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公开(公告)号：US5966930A
公开(公告)日：1999-10-19
申请号：US914823
申请日：1997-08-20
申请人： Gaku Hatano , Hideo Moriwaki , Yoshiaki Matsuzono , Sachito Fujimoto , Hisato Shimizu , Yuji Fujiki
发明人： Gaku Hatano , Hideo Moriwaki , Yoshiaki Matsuzono , Sachito Fujimoto , Hisato Shimizu , Yuji Fujiki
CPC分类号： F01N11/007 , F01N2900/0421 , Y02T10/47
摘要： A catalyst deterioration-determining system for an internal combustion engine has a catalyst arranged in the exhaust system, for purifying exhaust gases emitted from the engine, an oxygen concentration sensor arranged in the exhaust system at a location downstream of the catalyst, for detecting the concentration of oxygen present in the exhaust gases, and an ECU which controls the air-fuel ratio of an air-fuel mixture supplied to the engine in a feedback manner in response to the output from the oxygen concentration sensor. Determination of deterioration of the catalyst is carried out based on the output from the oxygen concentration sensor during execution of air-fuel ratio feedback control. An inversion period parameter representative of a repetition period of change in the output from the oxygen concentration sensor over a predetermined diagnosis period is measured, and a determination parameter is calculated by averaging values of the inversion period parameter measured over different diagnosis periods as the predetermined diagnosis period. The determination of deterioration of the catalyst is carried out based on the determination parameter.
摘要翻译： 一种用于内燃机的催化剂劣化判定系统，具有布置在排气系统中的用于净化从发动机排出的废气的催化剂，布置在该催化剂下游位置的排气系统中的氧浓度传感器，用于检测浓度 存在于排气中的氧气;以及ECU，响应于氧浓度传感器的输出，以反馈方式控制供给发动机的空气燃料混合物的空燃比。 基于在执行空燃比反馈控制期间来自氧浓度传感器的输出，进行催化剂劣化的测定。 测量代表氧浓度传感器在预定诊断期间的输出的重复变化周期的反转周期参数，并且通过将在不同诊断周期测量的反转周期参数的平均值作为预定诊断来计算确定参数 期。 基于确定参数进行催化剂劣化的测定。
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公开(公告)号：US5690076A
公开(公告)日：1997-11-25
申请号：US609748
申请日：1996-03-01
CPC分类号： F02M25/0809 , F02M25/08
摘要： An evaporative fuel-processing system for an internal combustion engine has an evaporative emission control system. An ECU carries out negative pressurization of the interior of the evaporative emission control system, by opening a purge control valve and closing a vent shut valve, and determines presence/absence of leakage from the evaporative emission control system, based on a rate of decrease in negative pressure within the system, by closing a purge control valve. Before the negative pressurization, the interior of the evaporative emission control system is opened to the atmosphere, and during the open-to-atmosphere, a pressure state within the fuel tank is estimated based on a rate of change in an output from a pressure sensor which senses pressure within the evaporative emission control system. The ECU determines whether the evaporative emission control system is normal, based on the estimated pressure state.
摘要翻译： 用于内燃机的蒸发燃料处理系统具有蒸发排放控制系统。 ECU通过打开吹扫控制阀并关闭排气关闭阀来执行蒸发排放控制系统内部的负压，并且基于蒸发排放控制系统的减少速率来确定来自蒸发排放控制系统的泄漏的存在/不存在 通过关闭清洗控制阀，系统内的负压。 在负压之前，蒸发排放控制系统的内部向大气开放，并且在开放到大气中，基于来自压力传感器的输出的变化率来估计燃料箱内的压力状态 其感测蒸发排放控制系统内的压力。 基于估计的压力状态，ECU确定蒸发排放控制系统是否正常。
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公开(公告)号：US5678523A
公开(公告)日：1997-10-21
申请号：US609744
申请日：1996-03-01
CPC分类号： F02M25/0809
摘要： An evaporative fuel-processing system for an internal combustion engine has an evaporative emission control system and a pressure sensor. An ECU carries out negative pressurization of the interior of the evaporative emission control system, by opening a purge control valve and closing a vent shut valve. The purge control valve is closed over a predetermined time period after the interior of the evaporative emission control system is brought into the predetermined negatively pressurized state, and a rate of decrease in negative pressure within the evaporative emission control system is detected. Then, it is determined whether or not there is leakage from the evaporative emission control system, based on the detected rate of decrease in the negative pressure, and at least one detected pressure value at at least one predetermined time point within the predetermined time period over which the purge control valve is closed.
摘要翻译： 用于内燃机的蒸发燃料处理系统具有蒸发排放控制系统和压力传感器。 ECU通过打开清洗控制阀并关闭排气关闭阀，对蒸发排放控制系统的内部进行负压。 在蒸发排放控制系统的内部进入预定的负压状态之后，在预定时间段内关闭净化控制阀，并且检测蒸发排放控制系统内的负压降低率。 然后，基于检测到的负压下降的速度来确定是否存在来自蒸发排放控制系统的泄漏，以及在预定时间段内的至少一个预定时间点的至少一个检测压力值 清洗控制阀关闭。
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公开(公告)号：US5732687A
公开(公告)日：1998-03-31
申请号：US742902
申请日：1996-11-01
CPC分类号： F02M25/0809 , F02M25/08
摘要： An evaporative fuel-processing system for an internal combustion engine includes a canister for adsorbing evaporative fuel generated in the fuel tank, a charging passage connecting between the canister and the fuel tank, a purging passage connecting between the canister and the intake system of the engine, an open-to-atmosphere passage for communicating the canister with atmosphere, a charge control valve for selectively opening and closing the charging passage, a purge control valve for selectively opening and closing the purging passage, and a vent shut valve for selectively opening and closing the open-to-atmosphere valve, and a pressure sensor inserted in the charging passage at a location on one side of the charge control valve closer to the fuel tank, for detecting internal pressure within the charging passage. When predetermined conditions are satisfied, the purge control valve is closed and the charge control valve and the vent shut valve are opened. It is determined that the vent shut valve is abnormal when the internal pressure detected by the pressure sensor is below a predetermined negative pressure value while the purge control valve, the charge control valve, and the vent shut valve are in the above respective states.
摘要翻译： 用于内燃机的蒸发燃料处理系统包括用于吸附在燃料箱中产生的蒸发燃料的罐，连接在罐和燃料箱之间的充电通道，连接在发动机的罐和进气系统之间的净化通道 ，用于使气罐与大气连通的开放通气通道，用于选择性地打开和关闭充气通道的充气控制阀，用于选择性地打开和关闭吹扫通道的吹扫控制阀，以及用于选择性地打开和关闭吹扫通道的排气关闭阀， 关闭大气开放阀，以及压力传感器，该压力传感器插入到充电控制阀的靠近燃料箱的一侧的位置处的充电通道中，用于检测充电通道内的内部压力。 当满足预定条件时，清除控制阀关闭，并且打开充气控制阀和排气关闭阀。 当清洗控制阀，充气控制阀和排气关闭阀处于上述各自状态时，当由压力传感器检测到的内部压力低于预定负压值时，确定排气关闭阀异常。
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5.发明授权Device for measuring concentration/flow rate of a mixture drawn into an internal combustion engine and air-fuel ratio control system of the engine incorporating the device 失效用于测量吸入内燃机的混合物的浓度/流量的测量装置以及装有该装置的发动机的空燃比控制系统
公开(公告)号：US5188085A
公开(公告)日：1993-02-23
申请号：US853289
申请日：1992-03-18
申请人： Masayuki Habaguchi , Toyohei Nakajima , Fumio Hosoda , Sachito Fujimoto , Masakazu Kitamoto , Hideo Moriwaki , Takefumi Nakamura
发明人： Masayuki Habaguchi , Toyohei Nakajima , Fumio Hosoda , Sachito Fujimoto , Masakazu Kitamoto , Hideo Moriwaki , Takefumi Nakamura
CPC分类号： F02D41/0045 , F02M25/08 , F02D41/0042
摘要： A device for measuring a flow rate of a mixture of evaporative fuel and air supplied to an internal combustion engine comprises a plurality of flowmeters arranged in a purging passage connecting between a canister and an intake passage of the engine for purging the mixture of evaporative fuel and air therethrough into the intake passage. The flowmeters have different output characteristics relative to concentration of the evaporative fuel in the mixture. At least one of the concentration of the evaporative fuel in the mixture and the volumetric flow rate of the mixture are detected based on outputs from the flowmeters. In an air-fuel ratio control system incorporating the above device, the weight per unit time of evaporative fuel supplied to the intake system is calculated from the detected concentration of the evaporative fuel and the detected volumetric flow rate of the mixture. The air-fuel ratio of a total air-fuel mixture supplied to the engine is corrected by the use of the ratio of the calculated weight per unit time of evaporative fuel supplied by purging to the intake system to weight per unit time of fuel supplied by injection to the engine.
摘要翻译： 用于测量供应到内燃机的蒸发燃料和空气的混合物的流量的装置包括多个流量计，其布置在连接在发动机的罐和进气通道之间的清洗通道中，用于清除蒸发燃料和 空气通过其进入进气通道。 流量计相对于混合物中蒸发燃料的浓度具有不同的输出特性。 基于来自流量计的输出来检测混合物中蒸发燃料的浓度和混合物的体积流量中的至少一种。 在包含上述装置的空燃比控制系统中，从检测到的蒸发燃料的浓度和检测到的混合物的体积流量计算供给到进气系统的蒸发燃料的每单位时间的重量。 提供给发动机的总空气燃料混合物的空燃比通过使用通过净化供给的蒸发燃料的每单位时间计算的重量与进气系统的重量的比率来校正， 注射到发动机。
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公开(公告)号：US5176123A
公开(公告)日：1993-01-05
申请号：US876997
申请日：1992-05-01
申请人： Fumio Hosoda , Sachito Fujimoto , Masakazu Kitamoto , Hideo Moriwaki , Takashi Kiyomiya , Koichi Hidano
发明人： Fumio Hosoda , Sachito Fujimoto , Masakazu Kitamoto , Hideo Moriwaki , Takashi Kiyomiya , Koichi Hidano
IPC分类号： F02M25/08
CPC分类号： F02M25/08
摘要： An evaporative fuel-purging control system for an internal combustion engine, which controls purging of a mixture of evaporative fuel from a fuel tank and air comprises a purge control valve arranged across a purging passage for controlling the flow rate of evaporative fuel from the fuel tank to an intake passage. The flow rate of evaporative fuel is detected and compared with a desired flow rate commensurate with an operating condition of the engine. The valve opening of the purge control valve is controlled in response to results of the comparison. The change rate of the valve opening is varied according to the concentration of evaporative fuel in the mixture. Specifically, the change rate is decreased as the evaporative fuel concentration is higher.
摘要翻译： 一种用于控制从燃料箱和空气中抽取蒸发燃料的混合物的内燃机的蒸发式燃料清除控制系统包括一个排放在净化通道上的净化控制阀，用于控制来自燃料箱的蒸发燃料的流量 进入通道。 检测蒸发燃料的流量并将其与与发动机的运行状态相称的期望流量进行比较。 根据比较结果控制清洗控制阀的开阀。 阀门开度的变化率根据混合物中蒸发燃料的浓度而变化。 具体地说，随着蒸发燃料浓度的升高，变化率降低。
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7.发明授权Evaporative fuel-purging control system and air-fuel ratio control system associated therewith for internal combustion engines 失效用于内燃机的蒸发式燃料清除控制系统和与之相关的空燃比控制系统
公开(公告)号：US5216995A
公开(公告)日：1993-06-08
申请号：US876982
申请日：1992-05-01
申请人： Fumio Hosoda , Sachito Fujimoto , Masashi Uchiyama , Toshikazu Oketani , Yoshiharu Abe , Kazumi Yamazaki , Teruo Wakashiro , Hideo Moriwaki
发明人： Fumio Hosoda , Sachito Fujimoto , Masashi Uchiyama , Toshikazu Oketani , Yoshiharu Abe , Kazumi Yamazaki , Teruo Wakashiro , Hideo Moriwaki
CPC分类号： F02D41/0045 , F02D41/0032 , F02D41/0042
摘要： A mass flowmeter outputs an output value indicative of the flow rate of a gaseous mixture containing evaporative fuel and being purged into the intake system of an internal combustion engine. A calculated value of the flow rate of the mixture is obtained based on a plurality of operating parameters of the engine. The actual flow rate of the mixture and/or the actual flow rate of the evaporative fuel are/is calculated based on the output value from the mass flowmeter and the calculated value based on the engine operating parameters. The concentration of the evaporative fuel is calculated from the calculated actual flow rates of the evaporative fuel and the mixture. The calculated actual flow rate is compared with a desired flow rate value, and a purge control valve is controlled based on results of the comparison. A basic amount of fuel supplied to the engine is corrected based on the calculated actual flow rate of the evaporative fuel.
摘要翻译： 质量流量计输出表示含有蒸发燃料的气体混合物的流量并被清除到内燃机的进气系统中的输出值。 基于发动机的多个操作参数获得混合物的流量的计算值。 基于来自质量流量计的输出值和基于发动机运转参数的计算值计算混合物的实际流量和/或蒸发燃料的实际流量。 蒸发燃料的浓度由计算出的蒸发燃料和混合物的实际流量计算。 将计算出的实际流量与期望的流量值进行比较，并且基于比较的结果控制清洗控制阀。 基于计算出的蒸发燃料的实际流量来校正供给发动机的基本燃料量。
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公开(公告)号：US5224456A
公开(公告)日：1993-07-06
申请号：US876981
申请日：1992-05-01
申请人： Fumio Hosoda , Hideo Moriwaki , Masakazu Kitamoto , Sachito Fujimoto , Kazumi Yamazaki , Takashi Kiyomura
发明人： Fumio Hosoda , Hideo Moriwaki , Masakazu Kitamoto , Sachito Fujimoto , Kazumi Yamazaki , Takashi Kiyomura
CPC分类号： F02D41/064 , F02D41/0035 , F02D41/0042 , F02M25/08
摘要： A starting fuel supply control system for an internal combustion engine having a purging passage connecting between a canister and an intake passage for purging a mixture of evaporative fuel from a fuel tank and air therethrough into the intake passage, and a purge control valve arranged across the purging passage for controlling the flow rate of the evaporative fuel to be supplied to the intake passage. An ECU detects a flow rate of an evaporative fuel component in the mixture flowing in the purging passage, and sets an amount of fuel to be supplied to the engine at the start thereof, based upon the detected flow rate of the evaporative fuel component.
摘要翻译： 一种用于内燃机的启动燃料供应控制系统，其具有连接在罐和进气通道之间的清洗通道，用于从燃料箱和空气通过的蒸发燃料的混合物吹入进气通道中;以及净化控制阀， 吹扫通道，用于控制要供应到进气通道的蒸发燃料的流量。 ECU检测在清洗通道中流动的混合物中的蒸发燃料成分的流量，并且基于检测到的蒸发燃料成分的流量，设定在起动时向发动机供给的燃料量。
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公开(公告)号：US5195495A
公开(公告)日：1993-03-23
申请号：US921158
申请日：1992-07-29
CPC分类号： F02D41/0045 , F02M25/08 , F02D41/0032 , F02M2025/0845
摘要： An evaporative fuel-purging control system for an internal combustion engine having a canister in which evaporative fuel from a fuel tank is adsorbed. One or more purging control valves are arranged across a purging pipe extending between the canister and an intake system. An ECU integrates an estimated value of a flow rate of evaporative fuel supplied to the engine, which is estimated as a purging flow rate in the purging pipe, in accordance with engine operating conditions when a specific one of the purging control valves is opened to thereby obtain an integrated purging flow rate value, and subtracts a predetermined decremental value from the integrated purging flow rate value when the specific one purging control valve is closed. When the integrated purging flow rate value is equal to or smaller than a predetermined lower limit value, the ECU decreases the flow rate of the evaporative fuel supplied to the intake system, based on the integrated purging flow rate value obtained above. When an air-fuel ratio correction coefficient value is equal to or greater than a predetermined value and at the same time the integrated purging flow rate value is equal to or greater than a predetermined value, the ECU increases the flow rate, based upon the integrated purging flow rate value.
摘要翻译： 一种用于内燃机的蒸发燃料清除控制系统，其具有吸附来自燃料箱的蒸发燃料的罐。 一个或多个清洗控制阀布置在在罐和进气系统之间延伸的吹扫管上。 ECU根据发动机的运转条件，将特定的排气控制阀打开时的发动机运转状态，估计为排气管内的净化流量的估计值，推定为发动机供给的蒸发燃料的流量的估计值 获得积分净化流量值，并且当特定的一个净化控制阀关闭时从积分净化流量值减去预定的减量值。 当积分净化流量值等于或小于预定下限值时，ECU基于上面获得的积分净化流量值来降低供给到进气系统的蒸发燃料的流量。 当空燃比校正系数值等于或大于预定值，并且同时积分净化流量值等于或大于预定值时，ECU基于积分 净化流量值。
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公开(公告)号：US5304235A
公开(公告)日：1994-04-19
申请号：US862460
申请日：1992-04-02
申请人： Hideo Watanabe , Masatoshi Udagawa , Naritoshi Muramatsu , Hideki Hoshino , Kazumi Yamazaki , Hideo Moriwaki , Atsushi Suzuki , Tsutomu Mori , Takenori Suzuki
发明人： Hideo Watanabe , Masatoshi Udagawa , Naritoshi Muramatsu , Hideki Hoshino , Kazumi Yamazaki , Hideo Moriwaki , Atsushi Suzuki , Tsutomu Mori , Takenori Suzuki
CPC分类号： B01D53/0415 , F02M25/0854 , B01D2253/102 , B01D2256/24 , B01D2259/40086 , B01D2259/4516 , B01D2259/4566 , F02M2025/0863
摘要： A canister includes a casing, a fuel reserve well defined at the bottom of the casing, an adsorbent layer provided in the casing for adsorbing fuel vapor, the adsorbent layer communicating with the fuel reserve well at a region of its lower portion and communicating with an atmosphere at its upper portion, a first communication passage defined so that the fuel reserve well communicates with a fuel system of an engine, and a second communication passage defined so that the fuel reserve well communicates with an intake system o f the engine. The second communication passage includes a purge chamber communicating with a region of the adsorbent layer other than the region of the adsorbent layer with which the fuel reserve well communicates, a first fuel outflow passage having a liquid fuel suction port open to the bottom of the fuel reserve well at its lower portion and a nozzle opening positioned in the purge chamber at its upper portion, and a second fuel outflow passage defined over the nozzle opening of the first fuel outflow passage for providing a fuel flow passage extending from the purge chamber to the suction system of the engine.
摘要翻译： 罐包括壳体，在壳体底部限定的燃料储存器，设置在壳体中用于吸附燃料蒸气的吸附剂层，吸附剂层在其下部的区域与燃料备用井连通并与其连通 其上部具有第一连通通道，第一连通通道被限定为使得燃料储备良好地与发动机的燃料系统连通;以及第二连通通道，其被限定为使得燃料储备良好地与发动机的进气系统连通。 第二连通通道包括与吸附剂层的除了燃料储备良好连通的区域之外的吸附剂层的区域连通的净化室，具有通向燃料底部的液体燃料吸入口的第一燃料流出通道 在其下部保持良好并且在其上部处设置在净化室中的喷嘴开口和限定在第一燃料流出通道的喷嘴开口上方的第二燃料流出通道，用于提供从吹扫室延伸到燃料流通道的燃料流动通道 发动机抽吸系统。
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