Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1999-01-06
2000-06-13
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
F16H 6106
Patent
active
060743255
ABSTRACT:
A shift control unit which improves the shift feeling of an automatic transmission includes an operation control device for placing a frictional engaging element in a slow drain state during a timing time decided by a timing time deciding device and in a quick drain state when the timing time has elapsed. The shift control unit is provided further with a computing device for computing the power-off engine speed necessary for outputting a small range upper limit value of a turbine torque from a number of revolutions of the turbine of the torque converter and from the performance characteristic of the torque converter, and an auxiliary operation control device for comparing the power-off engine speed and actual engine speed and for running the operation control device when the actual engine speed is equal to or greater than the power-off engine speed to place the frictional engaging element into the quick drain state immediately without running the operation control device when the actual engine speed is below the power-off engine speed.
REFERENCES:
patent: 5443595 (1995-08-01), Shimei et al.
patent: 5865708 (1999-02-01), Nishio et al.
patent: 5879268 (1999-03-01), Yasue et al.
patent: 5931885 (1999-08-01), Kubo et al.
Okumura Atuo
Onimaru Yoshiyuki
Sakai Takahiro
Shimei Masato
Shirai Yasuo
Aisin Seiki Kabushiki Kaisha
Wright Dirk
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