US5166877A — Method of speed reduction ratio control in contin…

Claim 1

Independent Claim 182 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission comprising the steps of: determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 2

Independent Claim 182 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission comprising the steps of: determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 3

Independent Claim 184 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission comprising the steps of: determining a predicted acceleration dV o /dt calculated from a reserved power of an engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual engine speed N, and a transmission rate K CL of engine power through a clutch, calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.4 *(N/V.sup.2)*(dVo/dt)*K.sub.CL +C.sub.5 *(1/V)*(dN.sub.o /dt) where, C 4 and C 5 are constants, and controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 4

Independent Claim 184 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission comprising the steps of: determining a predicted acceleration dV o /dt calculated from a reserved power of an engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual engine speed N, and a transmission rate K CL of engine power through a clutch, calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.4 *(N/V.sup.2)*(dVo/dt)*K.sub.CL +C.sub.5 *(1/V)*(dN.sub.o /dt) where, C 4 and C 5 are constants, and controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 5

Independent Claim 123 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved engine power Pa, determining a predicted acceleration dV o /dt using the reserved engine power, determining a reference change rate of engine speed dN o /dt, determining a vehicle acceleration dV/dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 6

Independent Claim 123 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved engine power Pa, determining a predicted acceleration dV o /dt using the reserved engine power, determining a reference change rate of engine speed dN o /dt, determining a vehicle acceleration dV/dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 7

Dependent Claim 33 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 3, wherein the reserved engine power Pa is calculated using the output power of said engine.

Claim 8

Independent Claim 139 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle with an engine operatively connected to said transmission, said transmission having a clutch, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved power Pa of said engine, determining a predicted acceleration dV o /dt of said vehicle from said reserved power Pa of said engine, determining a transmission rate K CL of said clutch, determining a reference change rate dN o /dt of said engine speed, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.4 *(N/V.sup.2)*(dV.sub.o /dt)*K.sub.CL +C.sub.5 *(1/V)*dN.sub.o /dt where C 4 and C 5 are constants, and controlling an actuator coupled to said continuously variable transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 9

Independent Claim 139 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle with an engine operatively connected to said transmission, said transmission having a clutch, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved power Pa of said engine, determining a predicted acceleration dV o /dt of said vehicle from said reserved power Pa of said engine, determining a transmission rate K CL of said clutch, determining a reference change rate dN o /dt of said engine speed, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.4 *(N/V.sup.2)*(dV.sub.o /dt)*K.sub.CL +C.sub.5 *(1/V)*dN.sub.o /dt where C 4 and C 5 are constants, and controlling an actuator coupled to said continuously variable transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 10

Dependent Claim 35 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 5, wherein the reserved power Pa of said engine is calculated using the output power of said engine.

Claim 11

Dependent Claim 80 words

A method for controlling a speed reduction ratio of a continuously variable transmission according to claim 5, further comprising the steps of determining whether said clutch is substantially fully closed and if said clutch is substantially fully closed then setting said transmission rate K CL of said clutch to 1, but if said clutch is not substantially fully closed then determining said transmission rate K CL of said clutch according to an opening of said clutch and said engine speed.

Claim 12

Independent Claim 103 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of calculating a time rate of change of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, a second component corresponding to a reference change rate of speed of said engine, and a third component corresponding to the variations of a running resistance of said vehicle, and controlling an actuator coupled to said continuously variable transmission in response to said calculated change rate of speed reduction ratio.

Claim 13

Independent Claim 103 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of calculating a time rate of change of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, a second component corresponding to a reference change rate of speed of said engine, and a third component corresponding to the variations of a running resistance of said vehicle, and controlling an actuator coupled to said continuously variable transmission in response to said calculated change rate of speed reduction ratio.

Claim 14

Independent Claim 105 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of calculating a change rate of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, said first component being corrected for a transmission rate of a clutch of said continuously variable transmission, and a second component corresponding to a reference change rate of the speed of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate of speed ratio.

Claim 15

Independent Claim 105 words

A method for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of calculating a change rate of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, said first component being corrected for a transmission rate of a clutch of said continuously variable transmission, and a second component corresponding to a reference change rate of the speed of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate of speed ratio.

Claim 16

Independent Claim 117 words

A method of controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of determining a predicted acceleration of said vehicle based on a reserved power of said engine, determining a reference change rate of the speed of said engine, calculating a change rate of speed reduction ratio of said transmission as the sum of a first component corresponding to said predicted acceleration of said vehicle and a second component corresponding to said reference change rate of the speed of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate of speed ratio.

Claim 17

Independent Claim 117 words

A method of controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising the steps of determining a predicted acceleration of said vehicle based on a reserved power of said engine, determining a reference change rate of the speed of said engine, calculating a change rate of speed reduction ratio of said transmission as the sum of a first component corresponding to said predicted acceleration of said vehicle and a second component corresponding to said reference change rate of the speed of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate of speed ratio.

Claim 18

Independent Claim 71 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, adjusting a time rate of change of said speed reduction ratio according to said reserved power, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 19

Independent Claim 71 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, adjusting a time rate of change of said speed reduction ratio according to said reserved power, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 20

Independent Claim 90 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, determining a reference change rate of engine speed of said engine, adjusting the time rate of change of said speed reduction ratio according to said reserved power and said reference change rate of engine speed, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 21

Independent Claim 90 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, determining a reference change rate of engine speed of said engine, adjusting the time rate of change of said speed reduction ratio according to said reserved power and said reference change rate of engine speed, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 22

Independent Claim 112 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved engine power Pa, determining a predicted acceleration dV o /dt using the reserved engine power, determining a reference change rate of engine speed dN o /dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 23

Independent Claim 112 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining a reserved engine power Pa, determining a predicted acceleration dV o /dt using the reserved engine power, determining a reference change rate of engine speed dN o /dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 24

Dependent Claim 69 words

A method for controlling a speed reduction ratio of a continuously variable transmission according to claim 13, further comprising the step of determining a vacuum of intake air of said engine, and wherein said reserved engine power is calculated using an output power of said engine and said output power of said engine is determined according to said engine speed and said vacuum of intake air of said engine.

Claim 25

Independent Claim 115 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining an output power of said engine, determining a predicted acceleration dV o /dt using the output power of said engine, determining a reference change rate of engine speed dN o /dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 26

Independent Claim 115 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining an engine speed N, determining a vehicle speed V, determining an output power of said engine, determining a predicted acceleration dV o /dt using the output power of said engine, determining a reference change rate of engine speed dN o /dt, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to said calculated change rate di/dt of speed reduction ratio.

Claim 27

Independent Claim 82 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, determining an operating condition of said vehicle, adjusting the time rate of change of said speed reduction ratio according to said reserved power and said operating condition, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 28

Independent Claim 82 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising the steps of determining a reserved power of said engine, determining an operating condition of said vehicle, adjusting the time rate of change of said speed reduction ratio according to said reserved power and said operating condition, and controlling an actuator coupled to said continuously variable speed transmission in response to said time rate of change of said speed reduction ratio.

Claim 29

Dependent Claim 28 words

A method for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 16, wherein said operating condition is the speed of said engine.

Claim 30

Independent Claim 97 words

A method for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising the steps of determining the speed of said engine, determining the speed of said vehicle, determining a reference change rate of engine speed based on a driver's intention to accelerate or decelerate, determining a reserved power of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to of said transmission based on said reference change rate of engine speed and said reserved power of said engine to vary the speed of said engine.

Claim 31

Independent Claim 97 words

A method for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising the steps of determining the speed of said engine, determining the speed of said vehicle, determining a reference change rate of engine speed based on a driver's intention to accelerate or decelerate, determining a reserved power of said engine, and controlling an actuator coupled to said continuously variable speed transmission in response to of said transmission based on said reference change rate of engine speed and said reserved power of said engine to vary the speed of said engine.

Claim 32

Independent Claim 117 words

A method for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising the steps of determining the speed N of said engine, determining the speed V of said vehicle, determining a reference change rate dN o /dt of engine speed based on a driver's intention to accelerate or decelerate, determining a reserved power Pa of said engine, determining a predicted acceleration dV o /dt using the reserved power of said engine, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to.

Claim 33

Independent Claim 117 words

A method for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising the steps of determining the speed N of said engine, determining the speed V of said vehicle, determining a reference change rate dN o /dt of engine speed based on a driver's intention to accelerate or decelerate, determining a reserved power Pa of said engine, determining a predicted acceleration dV o /dt using the reserved power of said engine, calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and controlling an actuator coupled to said continuously variable speed transmission in response to.

Claim 34

Dependent Claim 185 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+ C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and means for controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 35

Dependent Claim 185 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+ C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and means for controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 36

Dependent Claim 186 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of an engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual engine speed N, and a transmission rate K CL of engine power through a clutch, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.4 *(N/V.sup.2)*(dVo/dt)*K.sub.CL +C.sub.5 *(1/V)*(dN.sub.o /dt) where, C 4 and C 5 are constants, and means for controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 37

Dependent Claim 186 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of an engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual engine speed N, and a transmission rate K CL of engine power through a clutch, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.4 *(N/V.sup.2)*(dVo/dt)*K.sub.CL +C.sub.5 *(1/V)*(dN.sub.o /dt) where, C 4 and C 5 are constants, and means for controlling the speed reduction ratio using said calculated change rate di/dt of speed reduction ratio as a control value, wherein said continuously variable speed transmission comprises a hydraulic pump driven by said engine and a hydraulic motor driven by hydraulic pressure from said hydraulic pump, and a displacement of at least one of said hydraulic pump and hydraulic motor is variable and is controlled based on said change rate di/dt of speed reduction ratio.

Claim 38

Dependent Claim 134 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved engine power Pa, means for determining a predicted acceleration dV o /dt using the reserved engine power, means for determining a reference change rate of engine speed dN o /dt, means for determining a vehicle acceleration dV/dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 39

Dependent Claim 134 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved engine power Pa, means for determining a predicted acceleration dV o /dt using the reserved engine power, means for determining a reference change rate of engine speed dN o /dt, means for determining a vehicle acceleration dV/dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt)+C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 40

Dependent Claim 32 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 22, wherein the reserved engine power Pa is calculated using the output power of said engine.

Claim 41

Dependent Claim 151 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle with an engine operatively connected to said transmission, said transmission having a clutch, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved power Pa of said engine, means for determining a predicted acceleration dV o /dt of said vehicle from said reserved power Pa of said engine, means for determining a transmission rate K CL of said clutch, means for determining a reference change rate dN o /dt of said engine speed, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.4 *(N/V.sup.2)*(dV.sub.o /dt)*K.sub.CL +C.sub.5 *(1/V)*dN.sub.o /dt where C 4 and C 5 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 42

Dependent Claim 151 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle with an engine operatively connected to said transmission, said transmission having a clutch, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved power Pa of said engine, means for determining a predicted acceleration dV o /dt of said vehicle from said reserved power Pa of said engine, means for determining a transmission rate K CL of said clutch, means for determining a reference change rate dN o /dt of said engine speed, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.4 *(N/V.sup.2)*(dV.sub.o /dt)*K.sub.CL +C.sub.5 *(1/V)*dN.sub.o /dt where C 4 and C 5 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 43

Dependent Claim 34 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 24, wherein the reserved power Pa of said engine is calculated using the output power of said engine.

Claim 44

Dependent Claim 79 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission according to claim 24, further comprising means for determining whether said clutch is substantially fully closed and means, if said clutch is substantially fully closed, for then setting said transmission rate K CL of said clutch to 1, but if said clutch is not substantially fully closed, then for determining said transmission rate of said clutch according to an opening of said clutch and said engine speed.

Claim 45

Dependent Claim 105 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for calculating a time rate of change of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, a second component corresponding to a reference change rate of the speed of said engine, and a third component corresponding to the variations of a running resistance of said vehicle, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 46

Dependent Claim 105 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for calculating a time rate of change of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, a second component corresponding to a reference change rate of the speed of said engine, and a third component corresponding to the variations of a running resistance of said vehicle, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 47

Dependent Claim 104 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for calculating a change rate of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, said first component being corrected for a transmission rate of a clutch of said continuously variable transmission, and a second component corresponding to a reference change rate of the speed of said engine, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate of speed ratio.

Claim 48

Dependent Claim 104 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for calculating a change rate of speed reduction ratio as the sum of a first component corresponding to a predicted acceleration of said vehicle, said first component being corrected for a transmission rate of a clutch of said continuously variable transmission, and a second component corresponding to a reference change rate of the speed of said engine, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate of speed ratio.

Claim 49

Dependent Claim 120 words

Apparatus of controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for determining a predicted acceleration of said vehicle based on a reserved power of said engine, means for determining a reference change rate of the speed of said engine, means for calculating a change rate of speed reduction ratio of said transmission as the sum of a first component corresponding to said predicted acceleration of said vehicle and a second component corresponding to said reference change rate of the speed of said engine, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate of speed ratio.

Claim 50

Dependent Claim 120 words

Apparatus of controlling a speed reduction ratio of a continuously variable transmission in a vehicle, said transmission being operatively connected to an engine, comprising means for determining a predicted acceleration of said vehicle based on a reserved power of said engine, means for determining a reference change rate of the speed of said engine, means for calculating a change rate of speed reduction ratio of said transmission as the sum of a first component corresponding to said predicted acceleration of said vehicle and a second component corresponding to said reference change rate of the speed of said engine, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate of speed ratio.

Claim 51

Dependent Claim 73 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for adjusting a time rate of change of said speed reduction ratio according to said reserved power, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 52

Dependent Claim 73 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for adjusting a time rate of change of said speed reduction ratio according to said reserved power, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 53

Dependent Claim 94 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for determining a reference change rate of engine speed of said engine, means for adjusting the time rate of change of said speed reduction ratio according to said reserved power and said reference change rate of engine speed, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 54

Dependent Claim 94 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for determining a reference change rate of engine speed of said engine, means for adjusting the time rate of change of said speed reduction ratio according to said reserved power and said reference change rate of engine speed, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 55

Dependent Claim 121 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved engine power Pa, means for determining a predicted acceleration dV o /dt using the reserved engine power, means for determining a reference change rate of engine speed dN o /dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 56

Dependent Claim 121 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining a reserved engine power Pa, means for determining a predicted acceleration dV o /dt using the reserved engine power, means for determining a reference change rate of engine speed dN o /dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 57

Dependent Claim 66 words

Apparatus for controlling a speed reduction ratio of a continuously variable transmission according to claim 36, further comprising means for determining a vacuum of intake air of said engine, wherein said reserved engine power is calculated using an output power of said engine and said output power of said engine is determined according to said engine speed and said vacuum of intake air of said engine.

Claim 58

Dependent Claim 124 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining an output power of said engine, means for determining a predicted acceleration dV o /dt using the output power of said engine, means for determining a reference change rate of engine speed dN o /dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 59

Dependent Claim 124 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining an engine speed N, means for determining a vehicle speed V, means for determining an output power of said engine, means for determining a predicted acceleration dV o /dt using the output power of said engine, means for determining a reference change rate of engine speed dN o /dt, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 60

Dependent Claim 86 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for determining an operating condition of said vehicle, means for adjusting the time rate of change of said speed reduction ratio according to said reserved power and said operating condition, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 61

Dependent Claim 86 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission in a vehicle with an engine, comprising means for determining a reserved power of said engine, means for determining an operating condition of said vehicle, means for adjusting the time rate of change of said speed reduction ratio according to said reserved power and said operating condition, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said time rate of change of said speed reduction ratio.

Claim 62

Dependent Claim 27 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission according to claim 35, wherein said operating condition is the speed of said engine.

Claim 63

Dependent Claim 114 words

Apparatus for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising means for determining the speed of said engine, means for determining the speed of said vehicle, means for determining a reference change rate of engine speed based on a driver's intention to accelerate or decelerate, means for determining a reserved power of said engine, and means for controlling the speed reduction ratio of said transmission based on said reference change rate of engine speed and said reserved power of said engine to vary the speed of said engine, an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said speed reduction ratio.

Claim 64

Dependent Claim 114 words

Apparatus for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising means for determining the speed of said engine, means for determining the speed of said vehicle, means for determining a reference change rate of engine speed based on a driver's intention to accelerate or decelerate, means for determining a reserved power of said engine, and means for controlling the speed reduction ratio of said transmission based on said reference change rate of engine speed and said reserved power of said engine to vary the speed of said engine, an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said speed reduction ratio.

Claim 65

Dependent Claim 151 words

Apparatus for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising means for determining the speed N of said engine, means for determining the speed V of said vehicle, means for determining a reference change rate dN o /dt of engine speed based on a driver's intention to accelerate or decelerate, means for determining a reserved power Pa of said engine, means for determining a predicted acceleration dV o /dt using the reserved power of said engine, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission for controlling the speed of said engine by controlling the speed reduction ratio of said transmission using said calculated change rate di/dt of speed reduction ratio as a control value.

Claim 66

Dependent Claim 151 words

Apparatus for controlling a speed of an engine in a vehicle with a continuously variable transmission comprising means for determining the speed N of said engine, means for determining the speed V of said vehicle, means for determining a reference change rate dN o /dt of engine speed based on a driver's intention to accelerate or decelerate, means for determining a reserved power Pa of said engine, means for determining a predicted acceleration dV o /dt using the reserved power of said engine, means for calculating a change rate di/dt of speed reduction ratio according to the relationship di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) where C 1 and C 2 are constants, and an actuator coupled to said continuously variable speed transmission for controlling the speed of said engine by controlling the speed reduction ratio of said transmission using said calculated change rate di/dt of speed reduction ratio as a control value.

Claim 67

Dependent Claim 132 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) +C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 68

Dependent Claim 132 words

Apparatus for controlling a speed reduction ratio of a continuously variable speed transmission comprising means for determining a predicted acceleration dV o /dt calculated from a reserved power of engine, a reference change rate dN o /dt of an engine speed obtained based on a parameter representing a driver's intention to accelerate or decelerate, an actual vehicle speed V, an actual acceleration dV/dt, and an actual engine speed N, means for calculating a change rate di/dt of speed reduction ratio by the following equation using the above values di/dt=-C.sub.1 *(N/V.sup.2)*(dV.sub.o /dt)+C.sub.2 *(1/V)*(dN.sub.o /dt) +C.sub.3 *(N/V.sup.2)*(dV.sub.o /dt-dV/dt) where C 1 , C 2 , and C 3 are constants, and an actuator coupled to said continuously variable speed transmission, said actuator controlled in response to said change rate di/dt of speed reduction ratio.

Claim 69

Dependent Claim 12 words

Apparatus as in claim 39, wherein said actuator comprises a hydraulic pump.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-11-24	1996-05-25	1996-11-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-11-24	2000-05-25	2000-11-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-11-24	2004-05-25	2004-11-24	$7700.00	Window Closed / Lapsed

Method of speed reduction ratio control in continuously variable speed transmission

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