发明授权
- 专利标题： VERFAHREN ZUM BEREITSTELLEN VON UNTERDRUCK IN EINER UNTERDRUCKKAMMER EINES PNEUMATISCHEN BREMSKRAFTVERSTÄRKERS
- 专利标题（英）： Method for providing a negative pressure in a vacuum chamber of a pneumatic brake booster
- 专利标题（中）： 法的真空在气动制动助力器的真空室中提供
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申请号： EP05761129.5申请日： 2005-06-17
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公开(公告)号： EP1758780B1公开(公告)日： 2009-09-23
- 发明人: SCHONLAU, Jürgen , RÜFFER, Manfred , GONZALEZ, Jose
- 申请人： Continental Teves AG & Co. oHG
- 申请人地址： Guerickestrasse 7 60488 Frankfurt DE
- 专利权人： Continental Teves AG & Co. oHG
- 当前专利权人： Continental Teves AG & Co. oHG
- 当前专利权人地址： Guerickestrasse 7 60488 Frankfurt DE
- 优先权： DE102004029115 20040617; DE102005027768 20050615
- 国际公布： WO2005123476 20051229
- 主分类号： B60T17/02
- IPC分类号： B60T17/02 ; B60T13/52
摘要：
The invention relates to a method for providing a negative pressure of a brake actuation device of an automotive braking system comprising a pneumatic brake booster (1), the interior of which is subdivided into a vacuum chamber and a working chamber. The brake booster comprises a master brake cylinder (2) and a pneumatic motor/pump unit (3) for providing the negative pressure in the vacuum chamber. Said unit comprises a vacuum pump (6) and a motor (7) driving said vacuum pump (6). A sensor (9) detects a negative pressure level in the vacuum chamber or a pressure difference between the vacuum chamber and the working chamber. The motor/pump unit (3) is switched on by an electronic control unit (12) when the pressure falls below a first defined lower negative pressure level (Pe) and is switched off when a second defined upper negative pressure level (Pa) is reached. The invention is characterized in that a speed (np) of the motor/pump unit (3) is controlled subject to driving states of the vehicle.
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