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公开(公告)号：US09389142B2
公开(公告)日：2016-07-12
申请号：US14172209
申请日：2014-02-04
申请人： DENSO CORPORATION
发明人： Ryo Tamura , Yoshinori Maegawa
CPC分类号： G01M15/04 , F02M25/0809 , G01M3/26 , G01M15/042
摘要： A leakage diagnosis apparatus is applied to an evaporated-gas purge system including a negative-pressure sensor and a pressure detecting portion. The negative-pressure sensor introduces a negative pressure into an evaporation system. The pressure detecting portion detects the pressure in the evaporation system. The leakage diagnosis apparatus includes a leakage-diagnosis portion and a determining portion. The leakage-diagnosis portion executes a leakage diagnosis to determine whether a leakage of the evaporation system is generated. The determining portion determines whether an evaporated-gas amount in the evaporation system is in an excessive state while the internal combustion engine is stopped. The leakage-diagnosis portion prohibits or terminates the leakage diagnosis, when the determining portion determines that the evaporated-gas amount is in the excessive state.
摘要翻译： 将泄漏诊断装置应用于包括负压传感器和压力检测部的蒸发气体净化系统。 负压传感器将负压引入蒸发系统。 压力检测部分检测蒸发系统中的压力。 泄漏诊断装置包括泄漏诊断部和确定部。 泄漏诊断部分执行泄漏诊断以确定是否产生蒸发系统的泄漏。 确定部分确定在内燃机停止时蒸发系统中的蒸发气体量是否处于过度状态。 当确定部分确定蒸发气体量处于过度状态时，泄漏诊断部分禁止或终止泄漏诊断。
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公开(公告)号：US10151274B2
公开(公告)日：2018-12-11
申请号：US15752933
申请日：2016-10-25
申请人： DENSO CORPORATION
摘要： An abnormality detection device of an internal combustion engine includes an ECU that is an abnormality detection unit detecting a leakage occurrence of a second pure pipe. When the internal combustion engine is in a supercharging operation state that a supercharger operates and the second purge pipe is closed by a second purge valve, the ECU detects the leakage occurrence of the second purge pipe based on a differential pressure between a pressure in the second purge pipe and an atmospheric pressure. In this case, the valve pressure in the second purge pipe is a pressure in the second purge pipe between the second purge valve and the intake pipe.
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