Brake system
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United States of America Patent
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Oct 1, 2013
Grant Date -
Sep 8, 2011
app pub date -
Mar 2, 2011
filing date -
Mar 3, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a brake system capable of preventing fuel efficiency of a vehicle from being lowered. After a brake pedal is released, a pump is driven under a state in which opening/closure of valves included in an ABS/VDC actuator are regulated so that pressure-reduction control for returning a brake fluid in wheel cylinders to a master cylinder is performed. Therefore, the brake fluid remaining in the wheel cylinders is returned to the master cylinder via the pump to increase a hydraulic pressure of the master cylinder. As a result, return characteristics of an electric actuation unit are improved. Therefore, for example, even if viscosity of grease applied onto a rotary-to-linear motion converting mechanism is increased at a low temperature or the like, pistons of the master cylinder can be appropriately returned to initial positions.
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