Down-shift control system based on driver's intention for accele

Details Down-shift control system based on driver's intention for accele Down-shift control system based on driver's intention for accele

1998-08-26

2000-10-31

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

477 34, 477108, 123319, G06F 700

Patent

active

061416150

ABSTRACT:
A down-shift control system is provided, by which if sufficient torque cannot be obtained for an acceleration request or intention at a shift position, a down-shift operation is suitably performed so as to realize a reliable driving capability and no shift-busy phenomenon occurs. The system includes a section for calculating target driving force of a vehicle according to a degree of opening of an accelerator pedal and a speed of the vehicle; a section for detecting the present shift position of the vehicle; a section for calculating target engine torque based on the target driving force and the present shift position; a section for comparing the target engine torque with a set value determined according to torque characteristics of the engine; a section for performing an accumulating operation relating to the degree of opening if it is judged that the target engine torque equals or exceeds the set value; and a section for outputting a down-shift command if the accumulated value exceeds a threshold relating to the degree of opening.

REFERENCES:
patent: 4380048 (1983-04-01), Kishi et al.
patent: 5421791 (1995-06-01), Futawatari
patent: 5428531 (1995-06-01), Hayafune
Communication--Search Report (International) Jan. 11, 2000.

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