Vehicle drive system controller and control method

Details Vehicle drive system controller and control method Vehicle drive system controller and control method

1998-12-23

1999-12-28

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 90, 701 51, 477118, 477 62, B60L 1114

Patent

active

06009365&

ABSTRACT:
An engine and generator/motor are connected to the input shaft of a continuously variable transmission, and the output shaft of the continuously variable transmission is connected to drive wheels. A target value of a coasting torque acting on the output shaft during coasting is set according to a vehicle speed. A real coasting torque is estimated from the output torque of the engine and frictional torque of the continuously variable transmission. By making the generator/motor function as a generator or a motor, fluctuation of the engine braking force due to a variation of drive ratio during coasting is suppressed so that the real coasting torque coincides with the target value.

REFERENCES:
patent: 4533011 (1985-08-01), Heidemeyer et al.
patent: 5255192 (1993-10-01), Ito et al.
patent: 5309362 (1994-05-01), Ito et al.
patent: 5667458 (1997-09-01), Narita et al.
patent: 5928301 (1999-07-01), Soga et al.

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