Patent ID: 7309112
Filing Date: 2007-12-18
Classification: B60K,B60T,B60W,Y02T

Abstract:
1. A braking system comprising: a brake operating member manually operable by an operator of the braking system; a master cylinder operable upon an operation of said brake operating member and including a housing, and at least two pressurizing pistons which are fluid-tightly and slidably fitted in said housing and which cooperate with said housing to define at least two pressurizing chambers which are isolated from each other, and wherein a working fluid in each of said at least two pressurizing chambers is pressurized by an advancing movement of a corresponding one of said at least two pressurizing pistons; a hydraulically operable brake cylinder for activating a brake; and a valve device having a first state in which the pressurized fluid is delivered from two pressurizing chambers of said at least two pressurizing chambers to said brake cylinder, and a second state in which the pressurized fluid is delivered from only one of said two pressurizing chambers to said brake cylinder, wherein: