US5183128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the output of a vehicle equipped with an internal combustion engine
Assignee: Mitsubishi Motors Corp
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Filing: 1991-02-27
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Granted: 1993-02-02
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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 and an electronic control unit, 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
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
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: 13
Claim 1
Independent Claim
201 words
An apparatus for controlling an output of a vehicle equipped with an internal combustion engine, comprising: means for calculating a reference driving torque of the engine based upon a vehicle speed; means for detecting a slippage of driving wheels of the vehicle; setting means for obtaining correction torques for the reference driving torque, said setting means including a first means for setting an integral correction torque as one of said correction torques based upon an integral value of said detected slippage; limiter means for restricting said integral correction torque to a value of at least a negative lower limit when said integral correction torque has a negative value, said limiter means including means for reducing an absolute value of said negative lower limit in accordance with an increase of said vehicle speed; determination means for determining a target driving torque of the engine, said determination means including correction means for obtaining a corrected reference driving torque by subtracting said restricted integral conrrection torque from said reference driving torque, and means for calculating said target driving torque based upon the corrected reference driving torque; and controlling means for controlling an actual driving torque of the engine based upon said target driving torque.
Claim 2
Independent Claim
201 words
An apparatus for controlling an output of a vehicle equipped with an internal combustion engine, comprising: means for calculating a reference driving torque of the engine based upon a vehicle speed; means for detecting a slippage of driving wheels of the vehicle; setting means for obtaining correction torques for the reference driving torque, said setting means including a first means for setting an integral correction torque as one of said correction torques based upon an integral value of said detected slippage; limiter means for restricting said integral correction torque to a value of at least a negative lower limit when said integral correction torque has a negative value, said limiter means including means for reducing an absolute value of said negative lower limit in accordance with an increase of said vehicle speed; determination means for determining a target driving torque of the engine, said determination means including correction means for obtaining a corrected reference driving torque by subtracting said restricted integral conrrection torque from said reference driving torque, and means for calculating said target driving torque based upon the corrected reference driving torque; and controlling means for controlling an actual driving torque of the engine based upon said target driving torque.
Claim 3
Dependent Claim
64 words
an apparatus according to claim 1, wherein said slippage calculating means includes means for calculating a target peripheral speed of the driving wheels, means for detecting an actual peripheral speed of the driving wheels, and means for calculating the slippage of the driving wheels on the basis of a deviation between the target peripheral speed and the actual peripheral speed of the driving wheels.
Claim 4
Dependent Claim
41 words
An apparatus according to claim 2, wherein said reference driving torque calculating means includes means for calculating a longitudinal acceleration of the vehicle based upon the vehicle speed, and means for calculating the reference driving torque based upon the longitudinal acceleration.
Claim 5
Dependent Claim
44 words
A apparatus according to claim 1, wherein said reference driving torque calculating means includes means for calculating a target peripheral speed of the driving wheels based upon the vehicle speed, and means for calculating the reference driving torque based upon the target peripheral speed.
Claim 6
Dependent Claim
45 words
An apparatus according to claim 1 wherein said determination means includes means for deriving a running resistance acting on the vehicle from a road surface on which the vehicle is running, and means for correcting the target driving torque in accordance with the running resistance.
Claim 7
Dependent Claim
33 words
An apparatus according to claim 5, wherein said running resistance deriving means includes a map for determining a running resistance in accordance with a gradient of the road surface and the vehicle speed.
Claim 8
Dependent Claim
62 words
An apparatus according to claim 1, wherein said first means of said setting means includes means for repeatedly adding a predetermined positive value to said integral correction torque when said slippage is detected as having a positive value, and means for repeatedly adding a predetermined negative value to said integral correction torque when said slippage is detected as having a negative value.
Claim 9
Dependent Claim
51 words
An apparatus according to claim 1, wherein said limiter means has a limit range of said integral correction torque, said limit range being defined by said lower limit and an upper limit which is greater than said lower limit and has a value indicating magnitude of torque of at most zero.
Claim 10
Dependent Claim
63 words
An apparatus according to claim 1, wherein said setting means further includes second means for setting a proportional correction torque proportional to said detected slippage as one of said correction torques, and wherein said correcting means of said determining means obtains said corrected reference driving torque by subtracting said proportional correction torque and said restricted integral correction torque from said reference driving torque.
Claim 11
Dependent Claim
35 words
An apparatus according to claim 9, wherein said limiter means further includes means for reducing said proportional correction torque in accordance with a friction coefficient of a road surface on which the vehicle is running.
Claim 12
Dependent Claim
70 words
An apparatus according to claim 9, wherein said setting means further includes a third means for setting a differential correction torque corresponding to a differential value of said detected slippage as one of correction torques, and wherein said correction means of said determining means obtains said corrected reference torque by subtracting said differential correction torque, said proportional correction torque and said restricted integral correction torque from said reference driving torque.
Claim 13
Dependent Claim
41 words
An apparatus according to claim 11, wherein said limiter means further includes means for reducing at least one of said proportional and differential correction torques in accordance with the friction coefficient of a road surface on which said vehicle is running.
References Cited (Backward Citations)
US4637487A
Cited
EP0240174A1
Cited
US4884651A
Cited
US4768608A
Cited
US4953093A
Cited
US4999778A
Cited
JPH01271620A
Cited
US4970650A
Cited
US4985836A
Cited
US4985838A
Cited
EP0349993A2
Cited
US5070960A
Cited
US4985837A
Cited
US5022483A
Cited
US5025882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-02 | 1996-08-03 | 1997-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-02 | 2000-08-03 | 2001-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-02 | 2004-08-03 | 2005-02-02 | $7700.00 | Window Closed / Lapsed |