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    • 4. 发明申请
    • METHOD AND DEVICE FOR DETECTING LEAKS IN THE INTAKE TRACT OF AN INTERNAL COMBUSTION ENGINE
    • 用于检测内燃机内燃机泄漏的方法和装置
    • US20110282598A1
    • 2011-11-17
    • US13106055
    • 2011-05-12
    • Michael UNGERMANNAndreas BuseDieter Schwarzmann
    • Michael UNGERMANNAndreas BuseDieter Schwarzmann
    • G01M15/04G06F19/00
    • F02D41/18F02D41/0002F02D41/0007F02D41/22F02D2200/0402F02D2200/0406F02D2200/0414F02D2200/101Y02T10/42
    • A method for detecting a leak in an intake tract of an internal combustion engine including the following steps: operating the internal combustion engine at a first operating point having a rotational speed and a first pressure difference between the ambient pressure and the pressure in the intake tract of the internal combustion engine; computing a first expected mass flow into the intake tract; measuring a first mass flow into the intake tract and computing a difference between the measured first mass flow and the first expected mass flow; operating the internal combustion engine at a second operating point having the same rotational speed and a second pressure difference between the ambient pressure and the pressure in the intake tract of the internal combustion engine, the second pressure difference being different from the first pressure difference; computing a second expected mass flow into the intake tract; measuring a second mass flow into the intake tract and computing the difference between the measured second mass flow and the second expected mass flow; and comparing the mass flow differences ascertained at the first and at the second operating point.
    • 一种用于检测内燃机的进气道中的泄漏的方法,包括以下步骤:在具有旋转速度和环境压力与进气道中的压力之间的第一压力差的第一操作点处操作内燃机 的内燃机; 计算进入道中的第一预期质量流量; 测量进入进气道的第一质量流量并计算所测量的第一质量流量与第一预期质量流量之间的差值; 在具有相同旋转速度的第二操作点和环境压力与内燃机的进气道中的压力之间的第二压力差的第二操作点操作内燃机,第二压力差与第一压力差不同; 计算进入道中的第二预期质量流量; 测量进入进气道的第二质量流,并计算所测量的第二质量流和第二预期质量流之间的差; 并比较在第一和第二操作点确定的质量流量差。