Vehicle brake actuator and braking system
AssigneeLucas Industries Limited
InventorHermann H. Hoenick
Life of this patent
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Abstract
A vehicle brake actuator has a piston (23) within a cylinder (22) for urging friction pad assemblies (19, 20) into braking engagement with a brake disc (21). The actuator incorporates a pressure accumulator (3) and an electrical valve (9) operable to supply pressure from the accumulator to the cylinder in response to the action of a brake pedal or other control device. The actuator may also incorporate a pump (1) for charging the accumulator, together with other equipment such as skid control device. A braking system incorporates one or more of the actuators and device for producing an electrical output in response to displacement of the brake control device for supply to the valve.
Claims18
A vehicle brake actuator for urging at least one friction element into braking engagement with a cooperating element fixed to a member to be braked comprising pressure-applying means including a pressure cylinder and a piston slidable within the cylinder and operably associated with at least one said friction element to urge at least one said friction element into braking engagement with said cooperating element, a pressure accumulator, a supply of pressure fluid, a pump positioned within said cylinder operably connected to said supply of pressure fluid and said accumulator to charge the accumulator with said pressure fluid, valve means operably connected to said supply of pressure fluid and said accumulator to control the supply of pressure fluid from said accumulator to said pressure-applying means, brake control means, and an electrically-operated solenoid operably connected to said valve means and said brake control means to operate said valve means to control said pressure fluid supply in response to the action of said brake control means.
Dependencies are inferred from the claim text.