Patent ID: 6354672
Filing Date: 2002-03-12
Classification: B60T,Y10S

Abstract:
A braking system comprising:a brake cylinder; a first hydraulic pressure source including a first pump device operable to pressurize a working fluid; a second hydraulic pressure source operable in response to an operation of a brake operating member, to pressurize the fluid to a pressure higher than a value corresponding to an operating force acting on said brake operating member; a brake-cylinder-pressure control device operable when said brake cylinder is disconnected from said second hydraulic pressure source, to control the pressure of the fluid pressurized by said first hydraulic pressure source, such that a pressure of the fluid in said brake cylinder is controlled to a value determined on the basis of said operating force; and an emergency communication device operable when at least one of said brake-cylinder-pressure control device and said first pump device fails to normally function, to hold said brake cylinder in communication with said second hydraulic pressure source.