Method and apparatus to determine constant speed torque on an engine

Claim 3

An apparatus, according to claim 1, wherein said first means comprises: (a) a means for providing a signal having a value that is representative of the rotational speed of such vehicle engine's drive shaft; (b) a means for providing a signal having a value that is representative of the amount of fuel being supplied to such vehicle engine; (c) a means for storing a plurality of functions, each of said functions having a unique value representative of said momentary drive torque of such vehicle enging with respect to such rotational speed of such drive shaft of such vehicle's engine and such amount of fuel being supplied to such vehicle engine, said means for storing said plurality of functions electrically connected directly to said means for providing said signal value representative of such rotational speed of such drive shaft of such vehicle engine and directly to said means for providing said signal value representative of such amount of fuel being supplied to such vehicle engine; and (d) a signal generating means for providing said signal having a value that is representative of said momentary drive torque of such vehicle engine directly to said second means and directly to said fourth means, said signal generating means generating said signal value by comparing said functions with said signal value representative of such rotational speed of such drive shaft and said signal value representative of such amount of fuel being supplied to such vehicle engine.

Claim 4

An apparatus, according to claim 1, wherein such vehicle's engine is an internal combustion engine and the amount of fuel supplied to said engine is manually controllable by a driver of such vehicle.

Claim 7

An apparatus, according to claim 4, wherein said second means comprises: (a) a means for calculating said weight of such vehicle electrically connected to said first means to receive at least one signal value directly therefrom that is representative of said momentary drive torque of such vehicle's engine and electrically connected to said third means to receive directly therefrom at least two signal values that are representative of said acceleration of such vehicle at said preselected time and under said preselected driving conditions, said calculation of said weight of such vehicle is performed according to the relationship: ##EQU3## (b) a means for providing a signal directly to said calculation means that is representative of said preselected time and when said preselected driving conditions are present in such vehicle; and (c) a signal generating means for providing said signal value representative of said weight of such vehicle as determined by the solution to said relationship directly to said fourth means, said signal generating means being positioned within said calculating means.

Claim 8

An apparatus, according to claim 5, wherein said calculating means further comprises a means for establishing the formation of the ratio of said momentary drive torque of such drive shaft to the differential of said at least two signal values representative of said acceleration of such vehicle at said preselected time and under said preselected driving conditions.

Claim 9

An apparatus, according to claim 6, wherein said means for providing said signal to said calculating means representative of said preselected time and when said preselected driving conditions are present further comprises: (a) a clutch connected on one side thereof to such drive shaft of such vehicle engine and on the opposed side thereof to a shaft which is connected to such vehicle's transmission; (b) a control means for engaging and disengaging said clutch in response to a first control signal, said control means being connected to receive said first control signal directly from said fifth means; and (c) a means for supplying said first control signal directly from said fifth means to said calculating means so that at least one of said at least two signal values that are representative of said acceleration of such vehicle will be taken with said clutch in a disengaged condition and the other of said at least two signals will be taken at a time when said clutch is engaged.

Claim 10

An apparatus, according to claim 5, wherein said second means further comprises: (a) a means for forming an average value for said signal value representative of said weight of such vehicle from a plurality of previously determined different weight values; and (b) means for supplying said average value of said weight in said signal value that is representative of said weight of such vehicle.

Claim 11

An apparatus, according to claim 5; wherein said second means further comprises a means for analyzing weight values and utilizing only those weight values that do not exceed a specified deviation from a specified weight value.

Claim 12

An apparatus, according to claim 9, wherein said specified weight value is a previously determined weight value for said weight of such vehicle.

Claim 13

An apparatus, according to claim 9, wherein said second means further comprises a means for providing a signal value representative of a fixed specified weight value when said signal to said calculating means representative of said preselected time and said preselected driving conditions is outside a preselected range of values.

Claim 14

An apparatus, according to claim 4, wherein said third means comprises: (a) a speed sensing means positioned on such vehicle for determining the rotational speed of at least one driven wheel of such vehicle and for generating a signal value representative of said rotational speed; and (b) a differentiating means connected to receive said signal value from said speed sensing means for determining an acceleration value derived from the time slope of said rotational speed of said driven wheel, said differentiating means connected to supply said differentiated signal value representative of such vehicle's acceleration directly to said second means, and directly to said fourth means, and directly to said fifth means.

Claim 15

An apparatus, according to claim 12, wherein said speed sensing means is a tachometer.

Claim 16

An apparatus, according to claim 4, wherein said fourth means further comprises a calculating means for said determining of said constant speed drive torque according to the relationship: M.sub.stat ∝M.sub.A -G·f (s) wherein, M stat =constant speed drive torque, M A =momentary drive force, s=vehicle acceleration, and G=vehicle weight.

Claim 17

An apparatus, according to claim 14, wherein said calculating means determines a value for said M stat continuously.

Claim 18

An apparatus, according to claim 14, wherein said calculating means further comprises a means for calculating additional values according to the relationship: M'.sub.stat =M.sub.stat ·i/i' wherein, M stat =constant speed drive torque of engine in the engaged gear position, M' stat =constant speed drive torque of engine in another gear position, i=gear ratio of said engaged gear position, and i'=gear ratio of said other gear position.

Claim 19

An apparatus, according to claim 4, wherein said fifth means controls gear changes in a transmission control system of such vehicle.

Claim 20

An apparatus, according to claim 4, wherein said fifth means further comprises a means for requesting said constant speed drive torque representative signal value directly connected to said fourth means.

Claim 21

An apparatus, according to claim 4, wherein said fifth means further comprises at least one comparator device therein for comparing said constant speed drive torque representative signal value with a predetermined value.

Claim 22

A control system which operates in conjunction with a motor vehicle transmission, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of the acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of a constant speed drive torque of such vehicle engine's drive shaft, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said acceleration representative signal value from the value of said momentary drive torque representative signal and generating said signal having a value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal initiating a gear change, said transmission control means equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means representative of said momentary drive torque; (f) a first comparator comparing said constant speed drive torque signal value with a plurality of values with respect to the engaged gear; (g) a second comparator comparing said constant speed drive torque signal value with a plurality of values with respect to other gears; and (h) output from said first comparator and said second comparator connected to said transmission control to determine an operating gear.

Claim 23

A control system which operates in conjunction with a motor vehicle transmission, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of the acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of a constant speed drive torque of such vehicle engine's drive shaft, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said acceleration representative signal value from the value of said momentary drive torque representative signal and generating said signal having a value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal initiating a gear change, said transmission control means equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means representative of said momentary drive torque; (f) a first comparator comparing said constant speed drive torque signal value with a plurality of values with respect to the engaged gear; (g) a second comparator comparing said constant speed drive torque signal value with a plurality of values with respect to other gears; and (h) output from said first comparator and said second comparator connected to said transmission control to determine an operating gear.

Claim 24

A control system, according to claim 20, wherein said fourth means further comprises a calculating means for said determining of said constant speed drive torque according to the relationship: M.sub.stat ∝M.sub.A -G·f (s) wherein, M stat =constant speed drive torque, M A =momentary drive force, s=vehicle acceleration, and G=vehicle weight.

Claim 25

A control system, according to claim 21, wherein said calculating means determines a value for said M stat continuously.

Claim 26

A control system, according to claim 21, wherein said calculating means further comprises a means for calculating additional values according to the relationship: M'.sub.stat =M.sub.stat ·i/i' wherein, M stat =constant speed drive torque of engine in the engaged gear position, M' stat =constant speed drive torque of engine in another gear position, i=gear ratio of said engaged gear position, and i'=gear ratio of said other gear position.

Claim 27

A control system, according to claim 23, wherein said transmission control means further comprises a blocking means for preventing the shifting into another gear if said second comparator indicates that said M' stat of such other gear is less than said M stat of such engaged gear.

Claim 28

A control system, according to claim 24, wherein said transmission control means shifts into a higher gear if said first comparator indicates that M stat of such higher gear is greater than the M stat of the engaged gear.

Claim 29

A motor vehicle transmission control system, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said acceleration representative signal value from the value of said momentary drive torque representative signal and generating said signal value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for effectuating a required gear change connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and to receive said signal value directly from said fourth means that is representative of said momentary drive torque; (f) new gear selection means in said transmission control means and connected to receive said signal value directly from said second means representative of said acceleration and connected to said means for generating a signal for effectuating said required gear change; (g) a test means for determining if said momentary drive torque of such vehicle engine is sufficient to maintain operation of such vehicle at substantially the same speed in said new gear, said test means connected to receive said signal value directly from said fourth means representative of said momentary drive torque and to said new gear selection means; and (h) a means for blocking said shifting into said new gear when said test means indicates said momentary drive torque of said vehicle engine, when transmitted through said new gear, is insufficient to maintain substantially the same speed, said blocking means connected to said test means and to said means for generating said signal for effectuating said required gear change.

Claim 30

A motor vehicle transmission control system, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said acceleration representative signal value from the value of said momentary drive torque representative signal and generating said signal value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for effectuating a required gear change connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and to receive said signal value directly from said fourth means that is representative of said momentary drive torque; (f) new gear selection means in said transmission control means and connected to receive said signal value directly from said second means representative of said acceleration and connected to said means for generating a signal for effectuating said required gear change; (g) a test means for determining if said momentary drive torque of such vehicle engine is sufficient to maintain operation of such vehicle at substantially the same speed in said new gear, said test means connected to receive said signal value directly from said fourth means representative of said momentary drive torque and to said new gear selection means; and (h) a means for blocking said shifting into said new gear when said test means indicates said momentary drive torque of said vehicle engine, when transmitted through said new gear, is insufficient to maintain substantially the same speed, said blocking means connected to said test means and to said means for generating said signal for effectuating said required gear change.

Claim 31

A motor vehicle transmission control system, according to claim 26, wherein said test means is a comparator.

Claim 32

A motor vehicle transmission control system, according to claim 26, wherein said fourth means further comprises a calculating means for said determining of said constant speed drive torque according to the relationship: M.sub.stat ∝M.sub.A -G·f (s) wherein, M stat =constant speed drive torque, M A =momentary drive force, s=vehicle acceleration, and G=vehicle weight.

Claim 33

A motor vehicle, according to claim 28, wherein said calculating means further comprises a means for calculating additional values according to the relationship: M'.sub.stat =M.sub.stat ·i/i' wherein, M stat =constant speed drive torque of engine in the engaged gear position, M' stat =constant speed drive torque of engine in another gear position, i=gear ratio of said engaged gear position, and i'=gear ratio of said other gear position.

Claim 34

A motor vehicle transmission control system, according to claim 26, wherein said transmission control means further comprises a means for storing a plurality of value ranges for said momentary drive torques for each of said gears in such vehicle's transmission, said means for storing said momentary drive torque value ranges is connected to said test means.

Claim 35

A motor vehicle transmission control system, according to claim 26, wherein said control system further includes a means for determining a maximum momentary drive torque from a rotational speed limit of the drive shaft of such vehicle's engine.

Claim 36

A motor vehicle transmission control system, according to claim 31, wherein said means for determining said maximum momentary drive torque further comprises integral therewith a storage means for a plurality of RPM value ranges at constant momentary drive torque values.

Claim 37

An energy efficient motor vehicle transmission control system, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a valve that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said accleration representative signal value from the value of said momentary drive torque representative signal and generating a signal having a value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for making a required gear change connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means that is representative of said constant speed drive torque; (f) means for comparing said constant speed drive torque signal value with a plurality of predetermined economical constant speed drive torque value limits for various gears; and (g) said comparing means including a means for generating a signal when a gear shift will be outside said predetermined economical constant speed drive torque value limits.

Claim 38

An energy efficient motor vehicle transmission control system, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a valve that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal values directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representative signal value and said accleration representative signal value from the value of said momentary drive torque representative signal and generating a signal having a value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for making a required gear change connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means that is representative of said constant speed drive torque; (f) means for comparing said constant speed drive torque signal value with a plurality of predetermined economical constant speed drive torque value limits for various gears; and (g) said comparing means including a means for generating a signal when a gear shift will be outside said predetermined economical constant speed drive torque value limits.

Claim 39

An energy efficient transmission control system, according to claim 33, wherein said first means comprises: (a) a means for providing a signal having a value that is representative of the rotational speed of such vehicle engine's drive shaft; (b) a means for providing a signal having a value that is representative of the amount of fuel being supplied to such vehicle engine; (c) a means for storing a plurality of functions, each to said functions having a unique value representative of said momentary drive torque of such vehicle's engine with respect to such rotational speed of said drive shaft of such vehicle's engine and such amount of fuel being supplied to such vehicle's engine, said means for storing said plurality of functions electrically connected to said means for providing said signal value representative of such rotational speed of such drive shaft of such vehicle engine and to said means for providing said signal value representative of such amount of fuel being supplied to such vehicle engine; and (d) a signal generating means for providing said signal value that is representative of said momentary drive torque of such vehicle engine directly to said second means and directly to said fourth means, said signal generating means generating said signal value by comparing said functions with said signal value representative of such rotational speed of such drive shaft and said signal value representative of such amount of fuel being supplied to such vehicle engine.

Claim 40

An energy efficient transmission control system, according to claim 33, wherein said third means comprises: (a) a means for calculating said weight of such vehicle electrically connected to said first means to receive at least one signal value directly therefrom that is representative of said momentary drive torque of such vehicle's engine and electrically connected to said second means to receive directly therefrom at least two signal values that are representative of said acceleration of such vehicle at said preselected time and under said preselected driving conditions, said calculation of said weight of such vehicle is carried out according to the relationship: ##EQU4## (b) a means for providing a signal to said calculation means that is representative of said preselected time when said preselected driving conditions are present in such vehicle; and (c) a signal generating means for providing said signal value representative of said weight of such vehicle as determined by the solution to said relationship, said signal generating means supplying said weight signal value directly to said fourth means, said signal generating means being positioned within said calculating means.

Claim 41

An energy efficient transmission control system, according to claim 35, wherein said means for providing said signal to said calculating means that is representative of said preselected time and when said predetermined driving conditions are present in such vehicle further comprises: (a) a clutch connected on one side thereof to such drive shaft of such vehicle engine and on the opposed side thereof to a shaft which is connected to such vehicle's transmission; (b) a control means for engaging and disengaging said clutch in response to a first control signal, said control means being connected to receive said first control signal directly from said transmission control means; and (c) a means for supplying said first control signal from said transmission control means directly to said calculating means so that at least one of said at least two signal values that are representative of said acceleration of such vehicle will be taken when said clutch is in a disengaged condition and the other of said at least two signal values will be taken at a time when said clutch is engaged.

Claim 42

An energy efficient transmission control system, according to claim 33, wherein said fourth means further comprises a calculating means for said determining of said constant speed drive torque according to the relationship: M.sub.stat ∝M.sub.A -G·f (s) wherein, M stat =constant speed drive torque, M A =momentary drive force, s=vehicle acceleration, and G=vehicle weight.

Claim 43

An energy efficient transmission control system, according to claim 37, wherein said calculating means further comprises a means for calculating additional values according to the relationship: M'.sub.stat =M.sub.stat ·i/i' wherein, M stat =constant speed drive torque of engine in the engaged gear position, M' stat =constant speed drive torque of engine in another gear position, i=gear ratio of said engaged gear position, and i'=gear ratio of said other gear position.

Claim 44

An energy efficient transmission control system, according to claim 33, wherein said comparing means further comprises a means for storing and for determining the boundry of said plurality of predetermined economical constant speed drive torque value limits.

Claim 45

An energy efficient transmission control system, according to claim 33, wherein said control system further comprises a second comparator having a second plurality of established economical constant speed drive torque value limits, said second comparator including a signal generating means.

Claim 46

An energy efficient transmission control system, according to claim 40, wherein upshifting of said transmission is controlled by said signal generating means in one of said two comparators and downshifting of said transmission is controlled by said signal generating means in the other of said two comparator means.

Claim 47

A transmission control system of a motor vehicle, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal value directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representation signal value and said acceleration representation signal value from the value of said momentary drive torque representative signal and generating said signal value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for effectuating a gear change is connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means representative of said constant speed drive torque; and (f) a comparator means for comparing said signal value representative of said constant speed drive torque with at least one optimum torque value and controlling gear shift changes in response to said comparison, said comparing means includes a signal generating means connected to said transmission control means for generating said signal for effectuating said gear change.

Claim 48

A transmission control system of a motor vehicle, said control system comprising: (a) a first means for determining a momentary drive torque of such vehicle's engine and for generating a signal having a value that is representative of said momentary drive torque; (b) a second means for determining the acceleration of such vehicle, said determination occurring at a preselected time and under preselected driving conditions, said second means generating a signal having a value that is representative of said acceleration of such vehicle; (c) a third means for determining the weight of such vehicle connected to receive at least one signal value directly from said first means and at least two signal value directly from said second means, said at least one signal value received from said first means and said at least two signal values received from said second means being transmitted to said third means for calculating said weight of such vehicle, said third means generating a signal having a value that is representative of said calculated weight; (d) a fourth means for generating a signal having a value that is representative of said constant speed drive torque, said signal generating fourth means being connected to receive said signal value directly from said first means and said signal value directly from said second means and said signal value directly from said third means, said signal generating fourth means determining said constant speed drive torque by subtracting the product of said weight representation signal value and said acceleration representation signal value from the value of said momentary drive torque representative signal and generating said signal value that is representative of said constant speed drive torque; (e) a transmission control means for generating a signal for effectuating a gear change is connected to such vehicle's transmission, said transmission control means is equipped to receive said signal value directly from said second means representative of said acceleration and said signal value directly from said fourth means representative of said constant speed drive torque; and (f) a comparator means for comparing said signal value representative of said constant speed drive torque with at least one optimum torque value and controlling gear shift changes in response to said comparison, said comparing means includes a signal generating means connected to said transmission control means for generating said signal for effectuating said gear change.

Claim 49

A transmission control system, according to claim 42, wherein said first means further comprises: (a) a means for providing a signal value that is representative of the rotational speed of such vehicle engine's drive shaft; (b) a means for providing a signal value that is representative of the amount of fuel being supplied to such vehicle's engine; (c) a means for storing a plurality of functions, each of said functions having a unique value representative of said momentary drive torque of such vehicle engine with respect to such rotational speed of such drive shaft of such vehicle's engine and such amount of fuel being supplied to such vehicle engine, said means for storing said plurality of functions electrically connected to said means for providing said signal value representative of such rotational speed of such drive shaft and to said means for providing said signal value representative of such amount of fuel being supplied; and (d) a signal generating means for providing said signal value that is representative of said momentary drive torque of such vehicle engine directly to said second means and directly to said fourth means, said signal generating means generating said signal value by comparing said functions with said signal value representative of such rotational speed of such drive shaft and said signal value representative of such amount of fuel being supplied.

Claim 50

A transmission control system, according to claim 42, wherein said third means further comprises: (a) a means for calculating said weight of such vehicle electrically connected to said first means to receive at least one signal value directly therefrom that is representative of said momentary drive torque of such vehicle's engine and electrically connected to said second means to receive directly therefrom at least two signal values that are representative of said acceleration of such vehicle at said preselected time and under said preselected driving conditions, said calculation of said weight of such vehicle is performed according to the relationship: ##EQU5## (b) a means for providing a signal directly to said calculation means that is representative of said preselected time and when such vehicle's engine is in a driving condition and when such vehicle's engine is in a nondriving condition; and (c) a signal generating means for providing said signal value representative of said weight of such vehicle as determined by the solution to said relationship, said signal generating means supplying said weight signal value directly to said fourth means.

Claim 51

A transmission control system, according to claim 42, wherein said fourth means further comprises a calculating means for said determining of said constant speed drive torque according to the relationship: M.sub.stat ∝M.sub.A -G·f(s ) wherein, M stat =constant speed drive torque, M A =momentary drive force, s=vehicle acceleration, and G=vehicle weight.

Claim 52

A transmission control system, according to claim 45, wherein said calculating means further comprises a means for calculating additional values according to the relationship: M'.sub.stat =M.sub.stat ·i/i' wherein, M stat =constant speed drive torque of engine in the engaged gear position, M' stat =constant speed drive torque of engine in another gear position, i=gear ratio of said engaged gear position, and i'=gear ratio of said other gear position.

Claim 53

A transmission control system, according to claim 42, wherein said comparator means further comprises a plurality of optimum constant speed drive torque values corresponding to different gear positions available in said transmission stored in said comparator means.

Claim 54

A transmission control system, according to claim 42, wherein said transmission control means further comprises a blocking means for preventing the shifting of said gears into a new position when a differential is established by said comparator means between said constant speed drive torque value prevailing in the engaged gear position and said optimum constant speed drive torque value for said new gear position is outside a predetermined range of values.

Claim 57

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 49, wherein said determination of said momentary drive torque of such vehicle engine comprises the steps of: (a) determining the amount of fuel being supplied to such vehicle engine; (b) generating at least one signal that is representative of said amount of fuel being supplied as determined in step (a); (c) transmitting said signal value generated in step (b) to a memory storage and comparator device; (d) determining the rotational speed of the drive shaft of such vehicle engine; (e) generating at least one signal that is representative of rotational speed of said drive shaft determined in step (c); (f) transmitting said signal value generated in step (e) to said memory storage and comparator device; (g) maintaining a plurality of curves in said memory storage and comparator device which provides a unique momentary drive torque value in conjunction with a unique value for said amount of fuel being supplied to such vehicle's engine correlated with a unique value for said rotational speed of said drive shaft for that amount of fuel; and (h) determining said momentary drive torque on such vehicle's engine from said plurality of curves by comparing said signals transmitted in steps (c and f) with said plurality of curves.

Claim 58

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 49, wherein said determination of said weight comprises the steps of: (a) receiving at least one signal value that is representative of said momentary drive torque of such vehicle's engine in said apparatus for computing said weight; (b) receiving at least two signal values that are representative of said acceleration of such vehicle at preselected time periods and under preselected driving conditions in said apparatus for computing said weight; (c) establishing a functional relationship in said apparatus for computing said weight between said momentary drive torque and said acceleration, the solution of said functional relationship providing a weight value for such vehicle; and (d) determining said weight of such vehicle by calculating a solution to said functional relationship established in step (c) from said at least one signal value representative of said momentary drive torque received in step (a) and said at least two signal values representative of said acceleration received in step (b).

Claim 59

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 49, wherein said determination of said acceleration of such vehicle comprises the steps of: (a) generating a signal value representative of the rotational speed of a driven wheel on such vehicle; and (b) differentiating said signal value in step (a) to arrive at said acceleration value.

Claim 60

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 49, further comprising the steps of: (a) maintaining a plurality of curves in said transmission control system representing a range of operating limits for said constant speed drive torque; and (b) comparing said constant speed drive torque signal with said plurality of curves maintained in step (a) prior to effectuating a gear change.

Claim 61

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 53, further comprising the step of blocking said gear change when said comparison indicates said constant speed drive torque is outside said range of said operating limits.

Claim 62

A method of controlling a vehicle in response to a constant speed drive torque signal, according to claim 54, further comprising the step of maintaining said plurality of curves for said range of said operating limits for said constant speed drive torque in a range which provides a balance between fuel economy and engine performance.