BRAKE HYDRAULIC PRESSURE CONTROL DEVICE

• Main Author: HIRONAKA HIDEHARU
• Format: Patent
• Language: English
• Published: 17.03.2011
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a brake hydraulic pressure control device reducing generation of actuation noise caused by the self-excited oscillation of a linear solenoid valve with a simple constitution. SOLUTION: In the brake hydraulic pressure control device, cut valves 41, 42 are provided between a master cylinder 12 and wheel cylinders WC1, WC2, the master cylinder 12 is blocked from the wheel cylinders WC1, WC2 by the cut valves during the normal operation, brake fluid in a master cylinder reservoir 11 is sucked by a hydraulic pump 32, and fed to the wheel cylinders WC1-WC4 via booster solenoid valves 43-46, and the brake hydraulic pressure in the wheel cylinders WC1-WC4 is returned to the reservoir 11 to control the brake hydraulic pressure in the wheel cylinders WC1-WC4. A pulsation propagation reducing means reducing the propagation of the pressure pulsation among pressure-reducing solenoid valves 47-50 is provided on relief passages 65-68 connecting the pressure-reducing solenoid valves 47-50 to the reservoir 11, or a circulating passage 69. COPYRIGHT: (C)2011,JPO&INPIT