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公开(公告)号：US5427075A
公开(公告)日：1995-06-27
申请号：US216970
申请日：1994-03-24
CPC分类号： F02M25/0809
摘要： An evaporative emission control system includes a valve arranged in a passage communicating between a fuel tank and a canister. The valve opens the passage when pressure within part of the evaporative emission control system upstream of the valve exceeds a predetermined value and, closes the passage when the pressure is below the predetermined value. It is determined that the evaporative emission control system is normal when a value of the pressure with the part of the system detected by a pressure sensor is lower than a predetermined reference value below atmospheric pressure.
摘要翻译： 蒸发排放控制系统包括设置在燃料箱和罐之间连通的通道中的阀。 当阀门上游的蒸发排放控制系统的一部分内的压力超过预定值时，阀门打开通道，当压力低于预定值时关闭通道。 当由压力传感器检测到的部分系统的压力值低于低于大气压的预定参考值时，确定蒸发排放控制系统是正常的。
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公开(公告)号：US5477842A
公开(公告)日：1995-12-26
申请号：US282788
申请日：1994-07-29
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system for an internal combustion engine includes a charging passage extending between the canister and the fuel tank of the engine, a purging passage extending between the canister and the intake system of the engine, an open-to-atmosphere passage for communicating the interior of the canister to the atmosphere, a first control valve for selectively opening and closing the purging passage, and a second control valve for selectively opening and closing the open-to-atmosphere passage. A tank internal pressure sensor detects pressure within the evaporative fuel-processing system, and an ECU determines abnormality of the evaporative fuel-processing system, based on a variation in the detected pressure after the interior of the evaporative fuel-processing system is negatively pressurized into a predetermined negative pressure state. An amount of evaporative fuel generated within the evaporative fuel-processing system is detected based on an the output from the exhaust gas concentration sensor obtained when the first control valve is opened. The abnormality detection is restricted when the detected amount of evaporative fuel is larger than a predetermined amount.
摘要翻译： 用于内燃机的蒸发燃料处理系统包括在罐和发动机的燃料箱之间延伸的充气通道，在罐和发动机的进气系统之间延伸的吹扫通道，用于 将罐的内部连通到大气，用于选择性地打开和关闭清洗通道的第一控制阀和用于选择性地打开和关闭大气开放通道的第二控制阀。 罐内压传感器检测蒸发燃料处理系统内的压力，并且ECU基于蒸发燃料处理系统的内部被负压地加压后的检测压力的变化来确定蒸发燃料处理系统的异常 预定的负压状态。 基于当第一控制阀打开时获得的废气浓度传感器的输出，检测蒸发燃料处理系统内产生的蒸发燃料量。 当检测到的蒸发燃料量大于预定量时，异常检测受到限制。
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公开(公告)号：US5396873A
公开(公告)日：1995-03-14
申请号：US168383
申请日：1993-12-17
申请人： Masayoshi Yamanaka , Hiroshi Maruyama , Masataka Chikamatsu , Yasunari Seki , Kenichi Maeda , Kazutomo Sawamura
发明人： Masayoshi Yamanaka , Hiroshi Maruyama , Masataka Chikamatsu , Yasunari Seki , Kenichi Maeda , Kazutomo Sawamura
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system includes a first control valve arranged in a charging passage connecting between a fuel tank and a canister for adsorbing evaporative fuel generated from the fuel tank, a second control valve arranged in a purging passage connecting between the canister and an intake passage of the engine, a third control valve arranged in an air inlet port of the canister, and a system internal pressure sensor for detecting pressure within the system. The system is checked for a leak by monitoring a value of the pressure detected by the sensor after the system is negatively pressurized by closing the third control valve and opening the second control valve. The sensor is provided at a location upstream of the first control valve, and the first control valve is closed to detect a value of the pressure or a change thereof. Abnormality determination is carried out based on the detected value of the pressure. Alternatively, all of the above valves are closed in the negatively-pressurized state of the system to detect a first amount of change in the pressure, and then the first control valve alone is opened to detect a second amount of change in the pressure. Abnormality determination can be carried out based on the first and second amounts of change in the pressure, or by comparing a value of the pressure detected when the first and second valves are closed after negative pressurization with a value of the pressure detected after the first control valve is opened.
摘要翻译： 蒸发燃料处理系统包括：第一控制阀，其布置在连接在燃料箱和用于吸附从燃料箱产生的蒸发燃料的罐之间的充电通道中的第二控制阀;布置在连接在罐和进气口之间的清洗通道中的第二控制阀 发动机通过，布置在罐的进气口中的第三控制阀，以及用于检测系统内的压力的系统内部压力传感器。 通过关闭第三控制阀并打开第二控制阀，通过监视系统负压后由传感器检测到的压力值，来检查系统的泄漏。 传感器设置在第一控制阀的上游位置，第一控制阀关闭以检测压力值或其变化。 基于检测到的压力值进行异常判定。 或者，所有上述阀在系统的负压状态下关闭，以检测第一压力变化量，然后单独打开第一控制阀以检测第二压力变化量。 可以基于第一和第二压力变化量进行异常判定，或者通过将在第一和第二控制之后检测到的压力值与负压之后的第一和第二阀关闭时的压力值进行比较 阀打开。
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公开(公告)号：US5495842A
公开(公告)日：1996-03-05
申请号：US303681
申请日：1994-09-09
IPC分类号： F02M25/08
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system for an internal combustion engine includes an evaporative emission control system comprising charging passage extending between the canister and a fuel tank, a purging passage extending between the canister and an engine intake system, an open-to-atmosphere passage communicating the interior of the canister to the atmosphere, a purge control valve for opening and closing the purging passage, and an open-to-atmosphere valve for selectively opening and closing the open-to-atmosphere passage. A tank internal pressure sensor detects pressure within the evaporative emission control system. An ECU introduces negative pressure from the engine intake system into the evaporative emission control system and the fuel tank by opening the purge control valve and closing the open-to-atmosphere valve. The ECU compares a pressure value detected by the tank internal pressure sensor with a predetermined pressure value, and controls the valve opening amount of the purge control valve, based on the comparison results.
摘要翻译： 一种用于内燃机的蒸发燃料处理系统包括蒸发排放控制系统，其包括在罐和燃料箱之间延伸的充电通道，在罐和发动机进气系统之间延伸的净化通道，通向空气通道 罐到大气的内部，用于打开和关闭清洗通道的清洗控制阀，以及用于选择性地打开和关闭大气开放通道的开放到大气的阀。 油箱内部压力传感器检测蒸发排放控制系统内的压力。 ECU通过打开净化控制阀并关闭大气开放阀，将发动机进气系统的负压引入蒸发排放控制系统和燃油箱。 ECU将由箱内压传感器检测到的压力值与规定的压力值进行比较，并根据比较结果对排气控制阀的开阀量进行控制。
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5.发明授权
公开(公告)号：US5373823A
公开(公告)日：1994-12-20
申请号：US165411
申请日：1993-12-13
CPC分类号： F02M25/0809
摘要： A failure-detecting device detects failure of a tank internal pressure sensor for an internal combustion engine. The tank internal pressure sensor is provided in a fuel tank for detecting pressure within the fuel tank. The failure of the tank internal pressure sensor is detected by detecting an amount of variation in an output from the tank internal pressure sensor occurring within a predetermined time period elapses after the start of the engine and determining that the tank internal pressure sensor is abnormal when the amount of variation is below a predetermined value upon the lapse of the predetermined time period. A fail-safe device inhibits abnormality diagnosis of the evaporative emission control system when it is determined that the tank internal pressure sensor is abnormal. A fail-safe device performs a fail-safe action including at least opening a control valve arranged at an air inlet port of a canister for closing and opening the air inlet port, when it is determined that the tank internal pressure sensor is abnormal.
摘要翻译： 故障检测装置检测用于内燃机的罐内压传感器的故障。 油箱内部压力传感器设置在用于检测燃料箱内的压力的燃料箱中。 通过检测在发动机起动之后经过的预定时间段内发生的油箱内部压力传感器的输出的变化量来检测油箱内部压力传感器的故障，并且当油箱内部压力传感器异常时 在经过预定时间段后，变化量低于预定值。 当确定罐内压传感器异常时，故障安全装置禁止蒸发排放控制系统的异常诊断。 故障安全装置执行故障保护动作，其中，当确定油箱内部压力传感器异常时，至少打开布置在罐的空气入口处的控制阀，以关闭和打开进气口。
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6.发明授权
公开(公告)号：US5269277A
公开(公告)日：1993-12-14
申请号：US5803
申请日：1993-01-19
CPC分类号： F02M25/0809
摘要： A failure-detecting device detects failure of a tank internal pressure sensor for an internal combustion engine. The tank internal pressure sensor is provided in a fuel tank for detecting pressure within the fuel tank. The failure of the tank internal pressure sensor is detected by detecting an amount of variation in an output from the tank internal pressure sensor occurring within a predetermined time period elapses after the start of the engine and determining that the tank internal pressure sensor is abnormal when the amount of variation is below a predetermined value upon the lapse of the predetermined time period. A fail-safe device inhibits abnormality diagnosis of the evaporative emission control system when it is determined that the tank internal pressure sensor is abnormal. A fail-safe device performs a fail-safe action including at least opening a control valve arranged at an air inlet port of a canister for closing and opening the air inlet port, when it is determined that the tank internal pressure sensor is abnormal.
摘要翻译： 故障检测装置检测用于内燃机的罐内压传感器的故障。 油箱内部压力传感器设置在用于检测燃料箱内的压力的燃料箱中。 通过检测在发动机起动之后经过的预定时间段内发生的油箱内部压力传感器的输出的变化量来检测油箱内部压力传感器的故障，并且当油箱内部压力传感器异常时 在经过预定时间段后，变化量低于预定值。 当确定罐内压传感器异常时，故障安全装置禁止蒸发排放控制系统的异常诊断。 故障安全装置执行故障保护动作，其中，当确定油箱内部压力传感器异常时，至少打开布置在罐的空气入口处的控制阀，以关闭和打开进气口。
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公开(公告)号：USRE35054E
公开(公告)日：1995-10-10
申请号：US270778
申请日：1994-07-05
申请人： Masataka Chikamatsu , Masayoshi Yamanaka , Hiroshi Maruyama , Shigetaka Kuroda , Kazutomo Sawamura
发明人： Masataka Chikamatsu , Masayoshi Yamanaka , Hiroshi Maruyama , Shigetaka Kuroda , Kazutomo Sawamura
CPC分类号： F02M25/0809
摘要： A tank internal pressure-detecting device for an internal combustion engine having an evaporative emission control system for controlling purging of evaporative fuel generated in a fuel tank thereof into an intake system thereof. An ECU interrupts purging of evaporative fuel by the evaporative emission control system for a predetermined period of time after the engine is started. The ECU causes control valves of the evaporative emission control system to open the interior of the fuel tank to the atmosphere, and stores a value of pressure within the fuel tank detected by a tank internal pressure sensor as a reference value while the purging is being interrupted and at the same time the interior of the fuel tank is opened to the atmosphere. The ECU corrects an output value of the tank internal pressure sensor, based upon the reference value stored.
摘要翻译： 一种用于内燃机的罐内压检测装置，具有蒸发排放控制系统，用于控制在其燃料箱中产生的蒸发燃料的清洗进入其进气系统。 发动机启动后，ECU将通过蒸发排放控制系统中断预定时间段内的蒸发燃料的清除。 ECU使蒸发排放控制系统的控制阀将燃料箱的内部打开到大气中，并且在吹扫中断期间将由罐内压力传感器检测到的燃料箱内的压力值存储为参考值 并且同时燃料箱的内部向大气敞开。 ECU根据存储的参考值校正油箱内部压力传感器的输出值。
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公开(公告)号：US5357789A
公开(公告)日：1994-10-25
申请号：US149570
申请日：1993-11-09
CPC分类号： F02P15/006 , F02P17/12 , G01M15/042 , F02B1/04 , F02P2017/125 , F02P2017/128
摘要： Misfire detection system for an internal combustion engine. If misfire is found to occur due to vapor lock temporarily happening, it will erroneously be judged that the structure of the engine or the fuel supply system is out of order. However, vapor lock is an interruption of the flow of fuel in a gasoline engine caused by formation of vapor or gas bubbles, and does not mean the engine or the fuel supply system is degraded in its structure. On the contrary, if misfire is detected in such situation, the misfire detection degrades the reliability of the system. The misfire detection is therefore inactivated during conditions in which vapor lock is liable to occur, by discontinuing the detection, or by deliberately deeming no misfire to occurs even if it is so detected. Alternatively, the reference level for misfire detection is raised during such conditions.
摘要翻译： 内燃机失火检测系统。 如果由于蒸气锁暂时发生发生失火，将错误地判断发动机或燃料供应系统的结构是否有故障。 然而，蒸气锁是汽油发动机由蒸气或气泡形成引起的燃料流的中断，并不意味着发动机或燃料供应系统的结构降低。 相反，如果在这种情况下检测到失火，则失火检测会降低系统的可靠性。 因此，在容易发生蒸汽锁的情况下，通过中止检测，或者故意认为即使检测到不发生失火也会使失火检测失效。 或者，在这种情况下提高了失火检测的参考水平。
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公开(公告)号：US5355864A
公开(公告)日：1994-10-18
申请号：US173055
申请日：1993-12-27
申请人： Shigetaka Kuroda , Kazutomo Sawamura , Hiroshi Maruyama , Masayoshi Yamanaka , Yoichi Iwata , Tsuyoshi Takizawa
发明人： Shigetaka Kuroda , Kazutomo Sawamura , Hiroshi Maruyama , Masayoshi Yamanaka , Yoichi Iwata , Tsuyoshi Takizawa
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system for an internal combustion engine, in which a first control valve is arranged across an evaporative fuel-guiding passage extending from a fuel tank to a canister, a second control valve across a purging passage extending from the canister to the intake system of the engine, and a third control valve at an air inlet port of the canister, respectively. An ECU generates operation command signals to the first to third control valves for closing or opening the same. The ECU is responsive to an output from a tank internal pressure sensor which detects pressure within the fuel tank and the operation command signals, for detecting an abnormality in operation of a predetermined one of the first to third control valves.
摘要翻译： 一种用于内燃机的蒸发燃料处理系统，其中第一控制阀布置在从燃料箱延伸到罐的蒸发燃料引导通道的两侧，跨过从罐延伸到吹扫通道的清洗通道的第二控制阀 发动机的进气系统，以及位于罐的进气口的第三控制阀。 ECU向第一至第三控制阀产生操作命令信号以关闭或打开该控制阀。 ECU响应于检测燃料箱内的压力的油箱内部压力传感器和操作指令信号的输出，用于检测第一至第三控制阀中的预定的一个操作中的异常。
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公开(公告)号：US5355863A
公开(公告)日：1994-10-18
申请号：US159548
申请日：1993-12-01
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system for an internal combustion engine includes an evaporative emission control system having a canister, a first passage connecting between the canister and a fuel tank, a second passage connecting between the canister and the intake system of the engine, and a purge control valve arranged across the second passage, a drain shut valve for opening and closing an inlet port of the canister, and pressure sensors for detecting pressure within the evaporative emission control system. The evaporative emission control system is negatively pressurized by introducing negative pressure from the intake system into the evaporative emission control system by opening the purge control valve and closing the drain shut valve, to thereby bring the evaporative emission control system into a predetermined negatively pressurized state, and then closing the purge control valve to complete the negative pressurization. Presence/absence of a leak from the system is detected based on a rate of decrease in negative pressure within the evaporative emission control system after the closing of the purge control valve. The leak detection is started when the pressure within the evaporative emission control system becomes substantially equal throughout the system after the completion of the negative pressurization.
摘要翻译： 用于内燃机的蒸发燃料处理系统包括具有罐的蒸发排放控制系统，连接在罐和燃料箱之间的第一通道，连接在发动机的罐和进气系统之间的第二通道，以及 布置在第二通道上的清洗控制阀，用于打开和关闭罐的入口的排水关闭阀以及用于检测蒸发排放控制系统内的压力的压力传感器。 通过打开净化控制阀并关闭排水关闭阀，通过将进气系统的负压引入蒸发排放控制系统来对蒸发排放控制系统进行负压，从而使蒸发排放控制系统进入预定的负压状态， 然后关闭清洗控制阀以完成负压。 基于在清除控制阀关闭之后蒸发排放控制系统内的负压降低的速率来检测来自系统的泄漏的存在/不存在。 当负压力完成之后，蒸发排放控制系统内的压力在整个系统中变得基本相等时开始泄漏检测。
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