BACK-UP BRAKING SYSTEM AND METHOD FOR DRIVE-BY-WIRE VEHICLE

摘要

Back-up braking system (10) and method for reducing the velocity of a vehicle provided with an electronically controlled braking system (8, 13), and with a drive system comprising an engine (5) having a throttle control (11) for controlling the speed of the engine (5). The back-up braking system (10) is arranged to reduce the velocity of the vehicle using the throttle control (11) for a predetermined braking action. This may be accomplished by reducing the speed of the engine (5) after failure of the electronicallycontrolled braking system (8, 13) or by clutching and shifting toa lower gear at reduced speed of the engine. The vehicle may bestopped by halting the combustion of the engine (5) at the lowestgear of the drive train (6) and at a predetermined engine speed.