VEHICLE BRAKING SYSTEM

摘要

A vehicle braking system (110) comprising a brake actuator (112), a braking control valve assembly (114) and an emergency apply valve (122) having a control port (122d) which is connected to the supply line (116) by means of a further control line. According to the invention, the braking system (110) is also provided with a electrically operable brake apply valve (134) in the further control line for roll -over protection and/ or stability control, the brake apply valve (134) being movable between a first position in which fluid flow along further control line is permitted and a second position in which fluid flow along the further control line is substantially prevented and the control port (122d) of the emergency apply valve (122) is connected to a low pressure region.