HYDRAULIC BRAKING SYSTEM FOR A TRAILER

摘要

A tow vehicle-trailer braking system where a transducer in the brake line of the tow vehicle and a transducer in the brake line of the trailer are evaluated by a comparator to develop an operational signal to operate the wheel brakes of the trailer. The operational signal positions a solenoid valve to regulate the communication of fluid under pressure to the wheel brakes of the trailer. The fluid under pressure is developed by a pump. The pump is driven by a cam attached to the wheel of the trailer until the predetermined pressure level for the fluid is reached. Upon reaching this predetermined pressure, the pressurizing piston in the pump becomes disengaged from the cam.