| 摘要 |
<p>A hydraulic pressure source apparatus for a braking system, including a cylinder housing (20), a pressurizing piston (32) fluid-tightly and slidably received within the cylinder housing and cooperating with the cylinder housing to define a front pressurizing chamber (36, 38) and a rear assisting pressure chamber (50) on respective front and rear sides of the pressurizing piston, so that the pressurizing piston is advanced in response to an operation of a brake operating member (10), to pressurize a working fluid in the front pressurizing chamber, and an electrically controlled assisting pressure control device (64) for controlling an assisting hydraulic pressure in the rear assisting pressure chamber, such that a boosting ratio which is a ratio of an output to an input of the pressurizing piston is controlled to be a predetermined value.</p> |
