EP0444910A2
Expired / Lapsed
EP
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Controlling the output of a vehicle engine
Assignee: Mitsubishi Motors Corp
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Filing: 1991-02-27
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Granted: —
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Expires: 2011-02-27
Abstract
Abstract A control apparatus for controlling the output of a vehicle equipped with an internal combustion engine. The control apparatus includes a torque control unit (142) and an electronic control unit (12), is electrically connected to various sensors for detecting the running conditions of the vehicle, and is capable of controlling, e.g., the operations of a throttle valve and an ignition plug, to thereby control the driving torque of the engine. The control apparatus calculates a reference driving torque of the engine on the basis of the vehicle speed, and also calculates a slippage of the driving wheels on the basis of a deviation of peripheral speed between the driving and driven wheels. A correction torque for the reference driving torque, which is calculated by the control apparatus on the basis of the detected slippage, is subjected to restriction in accordance with the vehicle running conditions, and the reference driving torque is corrected in accordance with the restricted correction torque, to obtain a target driving torque. Thus, the control apparatus controls the operations of the throttle valve and ignition plug such that the actual driving torque of the engine coincides with the target driving torque.
Inventors
- 👤 Masayoshi Ito
- 👤 Kiichi Yamada
- 👤 Katsunori Otake
- 👤 Yasunobu Miyata
- 👤 Tomohiro Narita
- 👤 Susumu Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 01:49
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16; F; F16; F16H; F16H63/00; F16H63/40; B60W; B60W2710/00; B60W2710/06; B60W2710/0605
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
154 words
An apparatus for controlling an output of a vehicle equipped with an internal combustion engine(2), the apparatus having arithmetic means for deriving a target driving torque of the engine(2) in accordance with a slippage of driving wheels(FW) of the vehicle, and control means for controlling an actual driving torque of the engine(2) in accordance with the target driving torque, characterised in that said arithmetic means(TCL) includes means for calculating a reference driving torque(TB) of the engine(2) on the basis of a vehicle speed(V); means for calculating a slippage(s) of the driving wheels(FW) of the vehicle(2); correction means for calculating a correction torque for the reference driving torque(TB), on the basis of the slippage(s); limiter means for restricting the correction torque in accordance with running conditions of the vehicle; and determination means for determining the target driving torque(TO) of the engine(2) in accordance with the correction torque which has been restricted by the limiter means.
Claim 2
Dependent Claim
60 words
An apparatus according to claim 1, characterized in that said correction means includes means for calculating an integral correction torque(TI), as said correction torque, in accordance with to an integral value of slippage(s), said limiter means including a limit range for restricting the integral correction torque(TI) and varying means for varying the limit range in accordance with the vehicle speed.
Claim 3
Dependent Claim
39 words
An apparatus according to claim 2, characterized in that said limit range is defined by a fixed upper limit restricting the integral correction torque(TI) to zero or less, and a lower limit(TIL) varied in accordance with the vehicle speed(V).
Claim 4
Dependent Claim
55 words
An apparatus according to claim 3, characterized in that said varying means sets the absolute value of the lower limit(TIL) of said limit range to a large value when the vehicle speed(V) is in a low-speed region, and reduces the absolute value of the lower limit(TIL) as the vehicle speed(V) rises from the low-speed region.
Claim 5
Independent Claim
60 words
An apparatus according to any one of claims 1 to 4 characterized in that said correction means includes means for calculating a proportional correction torque(TP) as a correction torque proportional to the slippage(s), and said limiter means includes a limit range for clipping the proportional correction torque(TP) such that the proportional correction torque(TP) is not smaller than a predetermined value.
Claim 6
Independent Claim
89 words
An apparatus according any one of claims 1 to 5, characterized in that said correction means includes means for calculating an integral correction torque(TI) corresponding to an integral value of slippage(s), means for calculating a proportional correction torque(TP) proportional to the slippage(s), and means for calculating a correction torque(TPI) by adding together the integral correction torque(TI) and the proportional correction torque(TP), said limiter means having a limit range for clipping the integral correction torque(TI), among the correction torques, such that the integral correction torque(TI) is not larger than zero.
Claim 7
Dependent Claim
50 words
An apparatus according to claim 6, characterized in that said integral correction torque calculating means calculates the integral correction torque(TI) through an addition of a predetermined positive value when the slippage(s) takes a positive value, and through a subtraction of the predetermined value when the slippage(s) takes a negative value.
Claim 8
Independent Claim
36 words
An apparatus according any one of claims 1 to 7, characterized in that said limiter means restricts the correction torque in accordance with a friction coefficient of a road surface on which the vehicle is running.
Claim 9
Dependent Claim
109 words
An apparatus according to claim 8, characterized in that said correction means includes means for calculating an integral correction torque(TI) corresponding to an integral value of slippage(s), means for calculating at leat one of a proportional correction torque(TP) proportional to the slippage and a derivative correction torque(TP) on the basis of a rate(GS) of change of the slippage, and means for calculating the correction torque by adding together the integral correction torque(TI) and at least one of the proportional correction torque(TP) and the derivative correction torque(TD), said limiter means restricting the correction torques, except for the integral correction torque(TI), in accordance with the friction coefficient of the road surface.
Claim 10
Independent Claim
40 words
An apparatus according to any one of claims 1 to 9, characterized in that said correction means includes means for calculating a derivative correction torque(TD) as a correction torque on the basis of a rate(GS) of change of the slippage(s).
Claim 11
Dependent Claim
27 words
An apparatus according to claim 10, characterized in that said limiter means has a limit range defining upper and lower limit values of the derivative correction torque.
Claim 12
Independent Claim
72 words
An apparatus according to any one of claims 1 to 11, characterized in that said slippage calculating means includes means for calculating a target peripheral speed(VFO) of the driving wheels(FW), means for detecting an actual peripheral speed(VF) of the driving wheels(FW), and means for calculating the slippage(s) of the driving wheels (FW) on the basis of a deviation between the target peripheral speed(VFO) and the actual peripheral speed(VF) of the driving wheels(FW).
Claim 13
Dependent Claim
49 words
An apparatus according to claim 12, characterized in that said reference driving torque calculating means includes means for calculating a longitudinal acceleration(GFO, GXF) of the vehicle on the basis of the vehicle speed(V), and means for calculating the reference driving torque(TB) on the basis of the longitudinal acceleration(GFO, GXF).
Claim 14
Independent Claim
55 words
An apparatus according to any one of claims 1 to 13, characterized in that said reference driving torque calculating means includes means for calculating a target peripheral speed(VFO) of the driving wheels(FW) on the basis of the vehicle speed(V), and means for calculating the reference driving torque(TB) on the basis of the target peripheral speed(VFO).
Claim 15
Independent Claim
52 words
An apparatus according to any one of claims 1 to 14, characterized in that said determination means includes means for deriving a running resistance(TR) acting on the vehicle from a road surface on which the vehicle is running, and means for correcting the target driving torque(TO) in accordance with the running resistance.
Claim 16
Dependent Claim
35 words
An apparatus according to claim 15, characterized in that said running resistance deriving means has a map for determining a running resistance(TR) in accordance with a gradient of the road surface and the vehicle speed(V).
References Cited (Backward Citations)
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