发明申请
US20050034513A1 Method and control unit for functional diagnosis of a fuel tank ventilation valve in a fuel tank system, especially in a motor vehicle
失效
用于燃料箱系统中的燃料箱通风阀的功能诊断的方法和控制单元，特别是在机动车辆中
- 专利标题： Method and control unit for functional diagnosis of a fuel tank ventilation valve in a fuel tank system, especially in a motor vehicle
- 专利标题（中）： 用于燃料箱系统中的燃料箱通风阀的功能诊断的方法和控制单元，特别是在机动车辆中
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申请号： US10484974申请日： 2002-06-21
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公开(公告)号： US20050034513A1公开(公告)日： 2005-02-17
- 发明人: Martin Streib , Dieter Lederer , Karl-Bernhard Lederle
- 申请人： Martin Streib , Dieter Lederer , Karl-Bernhard Lederle
- 优先权： DE10136183.1 20010725
- 国际申请： PCT/DE02/02297 WO 20020621
- 主分类号： F02M25/08
- IPC分类号： F02M25/08 ; G01M19/00
摘要：
In a method for testing the functional reliability of a fuel-tank venting valve which is provided in a tank system of a motor vehicle in particular, is connected to an intake manifold and is triggerable by a control unit, a pressure source is provided for testing the tank system for leaks by using excess pressure or a vacuum, and the test of the functional reliability of the fuel-tank venting valve is performed on the basis of at least one performance quantity of the pressure source. In order to achieve a short diagnostic time and a high degree of diagnostic certainty, the fuel-tank venting valve is triggered to open or close, and a certain change in pressure is implemented. The at least one performance quantity of the pressure source is detected, and a properly opening and closing fuel-tank venting valve is determined from the performance quantity thus detected.
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