Motor vehicles – With means for detecting wheel slip during vehicle...
Patent
1990-06-02
1991-05-28
Marmor, Charles A.
Motor vehicles
With means for detecting wheel slip during vehicle...
36442601, 123332, B60K 2816
Patent
active
050185950
ABSTRACT:
A traction control system controls the engine torque so as to prevent wheel slip during acceleration. The system has an electric control unit ECU which detects the state of wheel slip on the basis of the deviation of the drive wheel speed from a target drive wheel speed computed in accordance with signals from various sensors such as drive wheel speed sensors, trailing wheel speed sensors, shift position sensor for sensing the shift position in an electronic control transmission ECT, engine speed sensor and accelerator sensor for sensing the amount of operation of accelerator. The ECU computes, in accordance with the state of the slip, a limit drive torque which does not allow surplus wheel slip during acceleration. The ECU also updates the limit drive torque depending on whether the surplus slip takes place on drive wheels, and detects also the amount of operation of the accelerator so as to inhibit updating of the limit drive torque when the detected amount of operation of accelerator is below a value corresponding to a limit throttle opening, whereby the engine is controlled such that the drive torque applied to the drive wheels is maintained below the limit drive torque.
REFERENCES:
patent: 4773517 (1988-09-01), Watanabe
patent: 4779696 (1988-10-01), Harada et al.
patent: 4811808 (1989-03-01), Matsumoto et al.
patent: 4850446 (1989-07-01), Leiber et al.
patent: 4953654 (1990-09-01), Imaseki et al.
Abe Tomoaki
Hara Mitsuo
Kamio Shigeru
Sakita Katsuya
Takao Mitsunori
Kagen Alan M.
Marmor Charles A.
Nippondenso Co. Ltd.
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