Patent ID: 6086515
Filing Date: 2000-07-11
Classification: B60T,B60W,Y10T

Abstract:
A method of retaining a vehicle on an inclined roadway and when starting uphill,the vehicle including a plurality of wheels arranged on at least two axles, a drive unit generating a drive torque, a brake system operated by a brake pedal, a parking brake operable independently from the brake system wherein,a brake force on at least one vehicle wheel is controlled according to sensed vehicle conditions, including at least one of vehicle speed, brake pedal application,a drive torque is determined,a current operating condition of the drive unit is determined,the method comprising the steps of,as long as a retaining system is switched on and the vehicle speed is below a limit value,maintaining the brake force when the brake pedal is applied and no drive torque is sensed;increasing the brake force when at least one of the following conditions occurs:the drive unit is switched off and neither the brake pedal nor the parking brake is activated,the driving engine is switched on and neither brake pedal application nor drive torque is sensed;reducing the brake force when at least one of the following conditions occurs:the parking brake is applied,the engine is switched off and the brake pedal is not applied,the engine is switched on and a drive torque is sensed;deactivating the retaining system when at least one of the following conditions occurs:the vehicle speed threshold is exceeded,movements of the vehicle are sensed,the retaining system is manually switched off.