Drive force controller for an automatic transmission

Details Drive force controller for an automatic transmission Drive force controller for an automatic transmission

1995-08-25

1997-09-30

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477121, 477902, F16H 5948

Patent

active

056721390

ABSTRACT:
The present invention provides for a rapid down-shift to meet an insufficient drive force due to an increase in running resistance such as when ascending a slope. Speed change control is carried out by selecting a speed change step based on the vehicle speed and throttle opening. When there is no speed change requirement, the current running resistance is computed, and the maximum drive force for the current speed change step computed. The maximum drive force is computed based on the down-shift throttle opening corresponding to the current vehicle speed on a down-shift line from the current speed change step to a speed change step on a lower speed side. The running resistance and maximum drive force are compared, and when the maximum drive force is less than the running resistance a forceful down-shift is made.

REFERENCES:
patent: 5231582 (1993-07-01), Takahashi et al.
patent: 5231897 (1993-08-01), Morita
patent: 5241476 (1993-08-01), Benford et al.
patent: 5272939 (1993-12-01), Markyvech et al.
patent: 5319555 (1994-06-01), Iwaki et al.
patent: 5425689 (1995-06-01), Genise

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