BRAKE SYSTEM ALSO FUNCTIONING AS ANTI-LOCK CONTROL

摘要

PURPOSE: To reduce noise by providing a pressure limiting valve applied with the pressure of an auxiliary pressure pump and the pressure of a wheel brake, and feeding a hydraulic pressure to a no-pressure return line with the pressure limiting valve to control the pressure of the auxiliary pressure pump when a pressure of the prescribed pressure or above is applied to the pressure limiting valve. CONSTITUTION: A pressure limiting valve 3 is provided between a return line 13 connecting a wheel brake 1 to a storage reservoir 4 and the intake line of an auxiliary pump 2. The pressure limiting valve 3 is made to communicate with the auxiliary pressure pump 2 and the front axle wheel brake 1 by an auxiliary pressure line 12 connecting a main pressure line 5 and the auxiliary pressure pump 2 and a control line 15 branched from the main pressure line 5. A second wheel brake 1' is connected to the pressure limiting valve 3 to form an OR circuit. When the mutual relation between the pressure in the auxiliary pressure pump 2 and the pressure in the wheel brake 1 exceeds the prescribed pressure, a hydraulic pressure is fed to a no-pressure return line 13 to adjust the pressure in the wheel brake 1.