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Leak determining apparatus, leak determining method, and engine control unit for an evaporated fuel treatment system
Leak determining apparatus, leak determining method, and engine control unit for an evaporated fuel treatment system
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机译:用于蒸发燃料处理系统的泄漏确定装置,泄漏确定方法和发动机控制单元
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摘要
A leak determining apparatus for an evaporated fuel treatment system is provided for executing a leak determination for an evaporated fuel treatment system without suspending it even in such a condition that variations in fuel could occur, thereby accurately providing a leak determination result. The leak determining apparatus calculates a reference differential pressure difference DDPZ as a difference between differential pressures of an inner tank pressure PTANK detected at two times in a leak check mode, i.e., a differential pressure DPZ2 and a differential pressure DPZ1 detected a predetermined slosh determination time before, and compares the reference differential pressure difference DDPZ with a slosh determining threshold value DDPZG to determine the presence or absence of sloshing. When the sloshing occurs, the leak determining apparatus calculates a second differential pressure DP2 using an inner tank pressure PTANK corrected with a slosh correction value DDPZHOSEI, and executes a leak determination based on the second differential pressure.
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