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    • 4. 发明申请
    • Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system
    • 在燃油箱通风系统中诊断燃油箱泄漏的程序
    • US20080034843A1
    • 2008-02-14
    • US11880538
    • 2007-07-23
    • Martin StreibKarl-Bernhard LederleMichael Pfeil
    • Martin StreibKarl-Bernhard LederleMichael Pfeil
    • G01M3/04
    • G01M3/3263
    • A method of diagnosing a fuel tank leak in a fuel tank ventilation system, comprising a fuel tank, an accumulator for fuel vapors and a fuel tank ventilation valve opening out into an intake manifold of an internal combustion engine, wherein the fuel tank, the accumulator and the fuel tank ventilation valve are connected by way of a system of lines and wherein the accumulator has an aeration line with a check valve, the method comprising: immediately before turning off the internal combustion engine, closing the check valve and opening the fuel tank ventilation valve to generate a vacuum in the fuel tank ventilation system; acquiring a vacuum degradation at specifiable points in time when the fuel tank ventilation valve is closed; opening of the check valve in order to bring about a pressure equilibrium with the ambient pressure; renewed closing of the check valve; acquiring a pressure increase emerging over at least a specifiable time interval and determination of a compensation variable; and inference about the presence of a leakage from behavior of the vacuum degradation over time, while taking into account behavior of the compensation variable over time.
    • 一种在燃料箱通风系统中诊断燃料箱泄漏的方法,包括燃料箱,用于燃料蒸汽的蓄能器和通向内燃机的进气歧管的燃料箱通风阀,其中燃料箱,蓄能器 并且所述燃料箱通风阀通过管线系统连接,并且其中所述蓄能器具有带止回阀的通气管,所述方法包括:在关闭所述内燃机之前,关闭所述止回阀并打开所述燃料箱 通风阀在燃油箱通风系统中产生真空; 在燃料箱通风阀关闭的可指定时间点获得真空退化; 打开止回阀以实现与环境压力的压力平衡; 更换关闭止回阀; 在至少可指定的时间间隔内获得压力增加并确定补偿变量; 并且在考虑到随时间推移的补偿变量的行为时,推断出随着时间的推移存在真空退化行为的泄漏。
    • 6. 发明授权
    • Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system
    • 在燃油箱通风系统中诊断燃油箱泄漏的程序
    • US07584651B2
    • 2009-09-08
    • US11880538
    • 2007-07-23
    • Martin StreibKarl-Bernhard LederleMichael Pfeil
    • Martin StreibKarl-Bernhard LederleMichael Pfeil
    • G01M3/26G01M3/32
    • G01M3/3263
    • A method of diagnosing a fuel tank leak in a fuel tank ventilation system, comprising a fuel tank, an accumulator for fuel vapors and a fuel tank ventilation valve opening out into an intake manifold of an internal combustion engine, wherein the fuel tank, the accumulator and the fuel tank ventilation valve are connected by way of a system of lines and wherein the accumulator has an aeration line with a check valve, the method comprising: immediately before turning off the internal combustion engine, closing the check valve and opening the fuel tank ventilation valve to generate a vacuum in the fuel tank ventilation system; acquiring a vacuum degradation at specifiable points in time when the fuel tank ventilation valve is closed; opening of the check valve in order to bring about a pressure equilibrium with the ambient pressure; renewed closing of the check valve; acquiring a pressure increase emerging over at least a specifiable time interval and determination of a compensation variable; and inference about the presence of a leakage from behavior of the vacuum degradation over time, while taking into account behavior of the compensation variable over time.
    • 一种在燃料箱通风系统中诊断燃料箱泄漏的方法,包括燃料箱,用于燃料蒸汽的蓄能器和通向内燃机的进气歧管的燃料箱通风阀,其中燃料箱,蓄能器 并且所述燃料箱通风阀通过管线系统连接,并且其中所述蓄能器具有带止回阀的通气管,所述方法包括:在关闭所述内燃机之前,关闭所述止回阀并打开所述燃料箱 通风阀在燃油箱通风系统中产生真空; 在燃料箱通风阀关闭的可指定时间点获得真空退化; 打开止回阀以实现与环境压力的压力平衡; 更换关闭止回阀; 在至少可指定的时间间隔内获得压力增加并确定补偿变量; 并且在考虑到随时间推移的补偿变量的行为时,推断出随着时间的推移存在真空退化行为的泄漏。
    • 8. 发明授权
    • Method and control unit for function diagnosis of a fuel-tank venting valve of a fuel tank system in a motor vehicle in particular
    • 特别是用于机动车辆中的燃料箱系统的燃料箱排放阀的功能诊断方法和控制单元
    • US07162914B2
    • 2007-01-16
    • US10484974
    • 2002-06-21
    • Martin StreibDieter LedererKarl-Bernhard Lederle
    • Martin StreibDieter LedererKarl-Bernhard Lederle
    • G01M3/04
    • F02M25/0818
    • 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.
    • 在一种用于测试设置在机动车辆的油箱系统中的燃油箱排放阀的功能可靠性的方法中,连接到进气歧管并且可由控制单元触发,提供用于测试的压力源 通过使用过量压力或真空来泄漏的罐系统,以及基于压力源的至少一个性能量来执行燃料箱排放阀的功能可靠性的测试。 为了实现较短的诊断时间和高度的诊断确定性,燃油箱通气阀被触发打开或关闭,并且实施了一定的压力变化。 检测压力源的至少一个性能量,根据这样检测出的性能量确定正确打开和关闭的燃料箱排放阀。