Cylinder device and hydraulic brake system
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United States of America Patent
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May 24, 2016
Grant Date -
Apr 30, 2015
app pub date -
Mar 27, 2013
filing date -
Mar 30, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
When a brake switch is switched from OFF to ON, current is applied to a brake ECU, and a command to switch a master cylinder from a second state to a first state is issued after a lapse of preparation time, so that switching-time change suppression control is performed. A reservoir shutoff valve is closed, and duty control is performed on a communication control valve. The duty ratio is set to 1 when a switching-time control duration expires, and the communication control valve is placed in an open position, to establish the first state. Thus, since the communication control valve is duty-controlled during switching from the second state to the first state, change in the hydraulic pressure of an input chamber is suppressed, and change of the operating feeling is suppressed.
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Cited Art Landscape
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