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31. 发明授权

US5245973A Failure detection device for evaporative fuel purge system 失效
标题翻译：蒸发燃料净化系统故障检测装置
公开(公告)号：US5245973A
公开(公告)日：1993-09-21
申请号：US867148
申请日：1992-04-10
申请人： Takayuki Otsuka , Nobuaki Kayanuma
发明人： Takayuki Otsuka , Nobuaki Kayanuma
IPC分类号： F02D41/00 , F02M25/08
CPC分类号： F02M25/0854 , F02M25/0809 , F02M25/08
摘要： A failure detection device that detects a failure occurring in an evaporative fuel purge system by detecting the pressure inside a vapor passage and a purge passage. The vapor passage and the purge passage are connected via a bypass passage. A pressure sensor is connected to either the vapor passage or the purge passage. An engine control unit is provided which judges that a failure has occurred in the evaporative fuel purge system when the pressure sensor detects a pressure equal to or higher than the predetermined pressure.
摘要翻译：一种故障检测装置，其通过检测蒸汽通道和净化通道内的压力来检测在蒸发燃料净化系统中发生的故障。蒸汽通道和净化通道经旁通通道连接。压力传感器连接到蒸气通道或净化通道。提供一种发动机控制单元，当压力传感器检测到等于或高于预定压力的压力时，判定在蒸发燃料净化系统中发生故障。

32. 发明授权

US5203870A Method and apparatus for detecting abnormal state of evaporative emission-control system 失效
标题翻译：用于检测蒸发排放控制系统的异常状态的方法和装置
公开(公告)号：US5203870A
公开(公告)日：1993-04-20
申请号：US721687
申请日：1991-06-26
申请人： Nobuaki Kayanuma , Kenichi Uchida , Takayuki Otsuka
发明人： Nobuaki Kayanuma , Kenichi Uchida , Takayuki Otsuka
IPC分类号： F02M25/08
CPC分类号： F02M25/0809 , F02M2025/0845
摘要： In an evaporative emission-control system having a canister for trapping a fuel-vapor evaporated from the fuel tank and a purge control valve for executing a purging, an amount of fuel-vapor trapped in the canister is measured while the engine is stopped or in an idle state. The trapped fuel-vapor is purged from the canister and mixed with an air-fuel mixture when the amount of fuel-vapor trapped in the canister is sufficient for diagnosis while the vehicle is running in a predetermined driving condition. In this purge operation, a concentration of a vapor-laden air from the canister is measured and the occurrence of an abnormal state of the evaporative emission-control system is determined when a change of the concentration of the vapor-laden air after the purging is less than a predetermined value.
摘要翻译：在具有用于捕集从燃料箱蒸发的燃料蒸汽的罐的蒸发排放控制系统和用于执行清洗的清除控制阀的情况下，在发动机停止时或者在发动机停止时测量捕集在罐中的燃料 - 蒸汽的量空闲状态。当车辆在预定的行驶状态下行驶时，捕集在罐中的燃料 - 蒸汽的量足以用于诊断时，将捕获的燃料蒸气从罐中吹扫并与空气 - 燃料混合物混合。在这种吹扫操作中，测量来自罐的蒸气的空气的浓度，并且当吹扫之后的蒸汽负载的空气的浓度的变化是蒸发排放控制系统的异常状态时，确定发生异常状态小于预定值。

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