发明申请
- 专利标题： Brake system for engine-operated vehicle and controlling method thereof
- 专利标题（中）： 发动机操纵车辆制动系统及其控制方法
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申请号： US12382268申请日： 2009-03-12
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公开(公告)号： US20090230761A1公开(公告)日： 2009-09-17
- 发明人: Hideki Sekiguchi , Toshiya Oosawa , Satoru Watanabe , Tomoyuki Murakami , Akihiro Sato , Motohiro Higuma
- 申请人： Hideki Sekiguchi , Toshiya Oosawa , Satoru Watanabe , Tomoyuki Murakami , Akihiro Sato , Motohiro Higuma
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 优先权： JP2008-064021 20080313
- 主分类号： B60T13/60
- IPC分类号： B60T13/60
摘要：
A brake system provided with a brake booster using intake negative pressure of an engine for boosting a brake operating force for a vehicle. A requested braking force is detected base on an operating amount of a brake pedal, and when the requested braking force is less than a threshold value, a master cylinder pressure prevailing in the master cylinder using an operating force boosted by the brake booster is supplied to the wheel cylinder. On the other hand, when the requested braking force is greater than or equal to the threshold value, brake fluid pressure having been boosted by a pump is supplied to the wheel cylinder. The threshold value is set to a value that becomes greater the larger the negative pressure inside the brake booster.