192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1984-11-26
1987-06-09
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 0076, 192 0092, 192 0096, B60K 4102, B60K 4128
Patent
active
046713972
ABSTRACT:
An automatic clutch control system and method for controlling a clutch for an automatic transmission when a clutch stroke sensor fails. The apparatus includes a clutch actuator for controlling a clutch stroke, a plurality of solenoid valves for controlling the clutch actuator, a clutch stroke sensor for measuring the clutch stroke, a control unit for feeding back a stroke signal detected by the clutch stroke sensor when requests for clutch engagement or disengagement are received and for controlling the solenoid valves so as to obtain a clutch moving speed defined by an engine rotational speed and other driving conditions. The control unit further includes a clutch engagement control section and a clutch disengagement control section for controlling solenoid valves for operating the clutch independently of the stroke signal when the stroke sensor fails. The control unit detects a failure of the stroke sensor by defining an upper limit value and a lower limit value for the stroke signal and when the stroke signal exceeds the upper limit value or is lower than the lower limit value it is determined that the stroke sensor has failed. The method includes the steps of setting the upper and lower limit values for the stroke signal, detecting a clutch stroke sensor failure by determining if the value of the stroke signal exceeds the upper limit or is less than the lower limit and operating the clutch at a predetermined speed if a stroke sensor failure is detected.
REFERENCES:
patent: 2983346 (1961-05-01), Weymann
patent: 4366889 (1983-01-01), Wang
patent: 4434879 (1984-03-01), Lutz et al.
patent: 4449620 (1984-05-01), Sakakiyama
patent: 4509625 (1985-04-01), Tellert
patent: 4527679 (1985-07-01), Hamada et al.
patent: 4532594 (1985-07-01), Hosaka et al.
Asagi Yasuyoshi
Hattori Toshihiro
Moride Shigeki
Ogawa Noriaki
Shishido Katsuya
Bonck Rodney H.
Fujitsu Limited
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