Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1996-12-18
1998-06-23
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477149, 477905, B60K 4110
Patent
active
057697540
ABSTRACT:
A kickdown control method for automatic transmission wherein a transmission control unit TCU receives signals regarding three variables for a throttle opening rate just prior to an abrupt operation of the accelerator pedal, the vehicle speed and the throttle opening rate changes during the operation of the accelerator pedal; if the throttle opening rate is lower than 20%, the vehicle speed is lower than 20 Km/h and the throttle opening rate change is lower than 30%, the transmission control unit TCU applies to the pressure control solenoid valve a first duty control pattern in which duty rate is constant with respect to time changes from shift start point; and if any one of said variables equal to or higher than the above reference values, the transmission control unit TCU applies to the pressure control solenoid valve a second duty control pattern in which the applied duty rate changes in multi-steps with regard to time change from shift start point.(Fig. 5)
REFERENCES:
patent: 4833945 (1989-05-01), Kondo
patent: 5092199 (1992-03-01), Goto et al.
patent: 5319998 (1994-06-01), Iwatsuki et al.
patent: 5624351 (1997-04-01), Fujita et al.
patent: 5662548 (1997-09-01), Mori
Hyundai Motor Company
Wright Dirk
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