Apparatus for controlling engine brake force during vehicle runn

Details Apparatus for controlling engine brake force during vehicle runn Apparatus for controlling engine brake force during vehicle runn

1993-01-28

1994-02-22

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74857, F16H 6102

Patent

active

052877736

ABSTRACT:
An apparatus for controlling the engine brake of a motor vehicle, adapted to control the intake air quantity of the engine so as to maintain the actual vehicle speed at a desired speed. The apparatus includes a device for avoiding acceleration of the vehicle during running on a downhill with the accelerator pedal released, and a device to permit deceleration of the vehicle during the subsequent running on an uphill road. The apparatus may include a device for increasing the engine brake force when the brake pedal is depressed, by fully closing the throttle valve and/or shifting down the transmission, to assure sufficient engine braking effect upon depression of the brake pedal on a downhill. The apparatus may include a device for updating the desired vehicle speed when the actual speed is lowered by depression of the brake pedal, to prevent acceleration of the vehicle after the brake pedal is released at the end of a downhill. The desired vehicle speed may be updated when the difference between the initially determined desired speed and the actual speed exceeds a given limit, or when the brake pedal is released.

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