Method and apparatus for controlling the speed of a motor vehicle
AssigneeSaab-Scania Aktiebolag
InventorLars-Gunnar Hedstrom
Life of this patent
Estimating the term…
Abstract
A method and apparatus for controlling the speed of a motor vehicle in which a target speed is established and lowered upon each actuation of a driver-actuated brake. If the actual vehicle's speed exceeds the target speed, an auxiliary braking system is actuated to lower the actual vehicle speed to the target speed. If the vehicle's accelerator is thereafter actuated, the auxiliary braking system is disabled until the driver-actuated brake is again actuated.
Claims10
A method of controlling the speed of a motor vehicle, the vehicle having a driver-actuated brake and an auxiliary braking system, which method comprises the steps of:
- (a) actuating the driver-actuated brake to brake the vehicle and establish a target speed;
- (b) reactuating the driver-actuated brake each time it is desired to lower the target speed;
- (c) measuring the vehicle speed;
- (d) comparing the speed of the vehicle with the target speed;
- and
- (e) braking the vehicle by actuation of the auxiliary braking system if the measured vehicle speed is greater than the target speed.
Apparatus for controlling the speed of a motor vehicle having a driver-actuated brake, which comprises:
- (a) means reponsive to actuation of the driver-actuated brake for establishing a target speed for the vehicle;
- (b) means for measuring the actual vehicle speed;
- (c) means for comparing the measured speed to the target speed;
- (d) an auxiliary braking system for braking the vehicle;
- and
- (e) means reponsive to the comparing means for actuating the auxiliary braking system if the measured speed is greater than the target speed.
Dependencies are inferred from the claim text.