Control system for hybrid vehicles

Details Control system for hybrid vehicles Control system for hybrid vehicles

1997-05-13

1999-08-24

Dougherty, Thomas M.

Electricity: single generator systems

Combined control of generator and driving means

Simultaneous control

290406, 180 652, 180 654, H02P 904, F02N 1106, B60K 100

Patent

active

059428791

ABSTRACT:
A control system for a hybrid vehicle including a traction motor which drives a drive shaft of the vehicle by electrical energy and has a regenerative function of converting kinetic energy of the drive shaft into electrical energy, a transmission arranged between driving wheels of the vehicle and an internal combustion engine of the vehicle and the traction motor, and a storage battery which supplies electrical energy to the traction motor and stores electrical energy output from the traction motor. A desired output from the traction motor is calculated according to decelerating conditions of the vehicle, and an optimal rotational speed of the traction motor at which the traction motor provides a maximum regeneration output is calculated according to the calculated desired output. The change gear ratio of the transmission is controlled such that the rotational speed of the traction motor is equal to the optimal rotational speed.

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