Patent ID: 9056602
Filing Date: 2015-06-16
Classification: B60T

Abstract:
1. A vehicle brake device for supplying brake fluid to a wheel cylinder of a friction brake provided for a wheel of a vehicle to generate a friction brake force on the wheel by the friction brake, the vehicle brake device comprising: a cylinder; a master piston arranged in the cylinder slidably in an axial direction and having a pressuring piston portion defining a master chamber that pressurizes brake fluid supplied to the wheel cylinder, together with an internal surface of the cylinder and a servo pressure receiving portion defining a servo pressure chamber together with the internal surface of the cylinder; an accumulating section that accumulates the brake fluid in a pressurized state; an electromagnetic valve that uses the brake fluid from the accumulating section to generate a pilot pressure; a regulator provided with a first piston that is slidably arranged in a housing and that partitions the interior of the housing into a first pilot chamber communicating with the electromagnetic valve and a servo pressure generating chamber communicating with the servo pressure chamber, and a valve mechanism that makes the servo pressure generating chamber communicate selectively with the accumulating section and a reservoir in dependence on the movement of the first piston; and a brake fluid absorbing section that communicates with the first pilot chamber and that absorbs the brake fluid of a quantity depending on the fluid pressure in the first pilot chamber.