Control system for distributing drive torque between front and r

Details Control system for distributing drive torque between front and r Control system for distributing drive torque between front and r

1996-05-17

1998-05-12

Louis-Jacques, Jacques H.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Control of power distribution between vehicle axis or wheels

701 75, 701 88, 180197, 180248, 180233, G06F 770, G06G 776

Patent

active

057522111

ABSTRACT:
In a control system for distributing a driving force from an engine between the front and rear wheels of a vehicle, a controller is designed to decrease the driving force transmitted to the secondary drive wheels which may be the front wheels by modifying a driving force distribution control characteristic when the vehicle is in a predetermined constant speed steady state, in order to improve the fuel economy in the steady state operation while maintaining a vivid vehicle response to a driver's accelerator input. Preferably, the controller determines an offset quantity L which has at least a cubic term proportional to the third power of a vehicle speed when the predetermined steady state exists, and increases the driving force to the secondary wheels as an excess of the wheel speed difference over the offset quantity increases from zero.

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