公开(公告)号：US5325664A

公开(公告)日：1994-07-05

申请号：US961794

申请日：1992-10-16

申请人： Yasunari Seki ,  Toshihiko Sato ,  Katuhiro Kumagai ,  Hiroshi Maruyama ,  Yoichi Iwata ,  Tsuyoshi Takizawa ,  Kenichi Maeda ,  Shigetaka Kuroda ,  Masataka Chikamatsu ,  Shukoh Terata ,  Kazutomo Sawamura ,  Hajime Uto ,  Takuya Aoki ,  Makoto Kobayashi

发明人： Yasunari Seki ,  Toshihiko Sato ,  Katuhiro Kumagai ,  Hiroshi Maruyama ,  Yoichi Iwata ,  Tsuyoshi Takizawa ,  Kenichi Maeda ,  Shigetaka Kuroda ,  Masataka Chikamatsu ,  Shukoh Terata ,  Kazutomo Sawamura ,  Hajime Uto ,  Takuya Aoki ,  Makoto Kobayashi

IPC分类号： F01N11/00 ,  F01N13/02 ,  F02F3/26

CPC分类号： F01N11/002 ,  F01N11/007 ,  F01N13/009 ,  F01N2550/02 ,  F01N2900/0422 ,  Y02T10/47

摘要： A catalyst deterioration-determining system determines deterioration of a catalyst arranged in the exhaust passage of an internal combustion engine. An ECU is responsive to an output from an O.sub.2 sensor arranged upstream of the catalyst or outputs from O.sub.2 sensors arranged upstream and downstream of the catalyst for controlling the air-fuel ratio of a mixture supplied to the engine by means of an air-fuel ratio correction value (first air-fuel ratio control). When the engine is in a predetermined operating condition, the system effects changeover from the first air-fuel ratio control to a second air-fuel ratio control which is responsive to the output from the downstream O.sub.2 sensor for controlling the air-fuel ratio of the mixture by means of the air-fuel ratio correction value. After the changeover has been effected, a time period is measured which elapses from the time the second air-fuel ratio control causes a change in the air-fuel ratio correction value from a richer side to a leaner side or vice versa with respect to a stoichiometric air-fuel ratio to the time the output from the downstream O.sub.2 sensor is inverted from the richer side to the leaner side or vice versa with respect to the stoichiometric air-fuel ratio. It is determined that the catalyst is deteriorated, when the measured time period is shorter than the predetermined time period.

摘要翻译： 催化剂劣化确定系统确定布置在内燃机的排气通道中的催化剂的劣化。 ECU响应于设置在催化剂上游的O 2传感器的输出或者从设置在催化剂上游和下游的O2传感器输出，用于通过空燃比控制供给发动机的混合物的空燃比 校正值（第一空燃比控制）。 当发动机处于预定的运行状态时，该系统实现从第一空燃比控制切换到第二空燃比控制，第二空燃比控制响应于来自下游O2传感器的输出，用于控制发动机的空燃比 通过空燃比校正值进行混合。 在切换已经实现之后，测量从第二空燃比控制引起空燃比校正值从更丰富侧到更瘦侧的变化时间经过的时间段，反之亦然 化学计量空燃比与下游O2传感器的输出相对于化学计量空燃比从更丰富的一侧反转到更稀的侧，反之亦然。 当测量的时间段短于预定时间段时，确定催化剂劣化。

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

IPC分类号： F02D41/00 ,  F02M25/08 ,  F02M33/02

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。

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

IPC分类号： F02M25/08 ,  F02M33/02

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。

公开(公告)号：US5241937A

公开(公告)日：1993-09-07

申请号：US986947

申请日：1992-12-08

申请人： Masaki Kanehiro ,  Yuichi Shimasaki ,  Takuji Ishioka ,  Shigeki Baba ,  Takashi Hisaki ,  Shigeru Maruyama ,  Masataka Chikamatsu ,  Shukoh Terata ,  Kazuhito Kakimoto ,  Kenichi Maeda ,  Kazutomo Sawamura ,  Eitetsu Akiyama

发明人： Masaki Kanehiro ,  Yuichi Shimasaki ,  Takuji Ishioka ,  Shigeki Baba ,  Takashi Hisaki ,  Shigeru Maruyama ,  Masataka Chikamatsu ,  Shukoh Terata ,  Kazuhito Kakimoto ,  Kenichi Maeda ,  Kazutomo Sawamura ,  Eitetsu Akiyama

IPC分类号： F02P17/12

CPC分类号： F02P17/12 ,  F02P2017/125 ,  F02P2017/128

摘要： A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. The detected value of the sparking voltage is compared with a first predetermined value. A degree to which the detected value of the sparking voltage exceeds the first predetermined value is measured. The measured degree is compared with a second predetermined value. It is determined based upon results of the latter comparison whether or not a misfire occurred in the engine. According to a first aspect of the invention, the second predetermined reference value is set based upon detected values of operating parameters of the engine. According to a second aspect of the invention, the determination of occurrence of a misfire is inhibited when the engine is in a predetermined operating condition.

摘要翻译： 失火检测系统检测内燃机中发生的失火。 检测用于排放发动机的火花塞的火花电压的值。 将检测到的火花电压的值与第一预定值进行比较。 测量火花电压的检测值超过第一预定值的程度。 将测量度与第二预定值进行比较。 基于后一比较的结果确定发动机中是否发生失火。 根据本发明的第一方面，基于发动机的操作参数的检测值来设定第二预定参考值。 根据本发明的第二方面，当发动机处于预定操作状态时，禁止发生失火的确定。

公开(公告)号：US5375462A

公开(公告)日：1994-12-27

申请号：US61712

申请日：1993-05-17

申请人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Shukoh Terata ,  Masaki Kanehiro ,  Takuji Ishioka ,  Kenichi Maeda

发明人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Shukoh Terata ,  Masaki Kanehiro ,  Takuji Ishioka ,  Kenichi Maeda

IPC分类号： F02D45/00 ,  G01M15/11 ,  G01M15/00

CPC分类号： G01M15/11

摘要： A misfire detecting system for an internal combustion engine, including an intake pipe internal pressure detecting device for detecting an internal pressure of an intake pipe of the internal combustion engine, and a misfire detection inhibiting device for inhibiting the detection of misfire when the internal pressure of the intake pipe detected by the intake pipe internal pressure detecting device is lower than an intake pipe internal pressure in a no-load condition.

摘要翻译： 一种用于内燃机的失火检测系统，包括用于检测内燃机的进气管的内部压力的进气管内压检测装置和用于在内燃机的内部压力下禁止检测到失火的失火检测禁止装置 由进气管内压检测装置检测到的进气管在空载状态下低于进气管内压。

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

IPC分类号： F02M37/00 ,  F02M25/08 ,  F02M33/02

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。

公开(公告)号：USRE37895E1

公开(公告)日：2002-10-29

申请号：US08620299

申请日：1996-03-22

申请人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Masataka Chikamatsu ,  Shoichi Nemoto ,  Takeshi Suzuki

发明人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Masataka Chikamatsu ,  Shoichi Nemoto ,  Takeshi Suzuki

IPC分类号： F02M3302

CPC分类号： F02M25/0809 ,  F02D41/003 ,  F02D41/1454 ,  F02D2041/225 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0606 ,  F02D2200/703 ,  F02M2025/0845

摘要： An evaporative fuel processing system adapted to be capable of detecting abnormality of an evaporative emission control system for storing, in a canister, evaporative fuel from a fuel tank for holding fuel to be supplied to an internal combustion engine, and purging evaporative fuel into the intake system of the engine. A first control valve is arranged across a passage extending between the fuel tank and the canister. A second control valve is arranged across a passage extending between the canister and the intake system of the engine. A third control valve is provided for an air inlet part of the canister communicatable with the atmosphere. Through operating these control valves to open and close them, the evaporative emission control system is negatively pressurized, and abnormality of this system is detected based on the pressure detected in this negatively pressurized state thereof. Timing for carrying out abnormality determination is determined depending on conditions of the fuel tank. Before starting the whole process for abnormality diagnosis of the system evaporative fuel stored in the canister is allowed to be purged for a predetermined time period. When the temperature of fuel in the fuel tank exceeds a predetermined value, the abnormality determination is inhibited.

摘要翻译： 一种蒸发燃料处理系统，其适于能够检测蒸发排放控制系统的异常，所述蒸发排放控制系统用于将来自燃料箱的蒸发燃料储存在用于保持要供应到内燃机的燃料的蒸发排放控制系统中，并将蒸发燃料吹入进气口 发动机系统。 第一控制阀横跨在燃料箱和罐之间延伸的通道布置。 第二控制阀跨过在发动机的罐和进气系统之间延伸的通道布置。 第三控制阀设置用于可与大气通信的罐的空气入口部分。 通过操作这些控制阀来打开和关闭它们，蒸发排放控制系统被负压，并且基于在其负压状态下检测到的压力来检测该系统的异常。 用于进行异常判定的定时取决于燃料箱的状况。 在开始用于系统的异常诊断的整个过程之前，允许存储在罐中的蒸发燃料被清洗预定时间段。 当燃料箱中的燃料的温度超过预定值时，禁止异常判定。

公开(公告)号：US5267547A

公开(公告)日：1993-12-07

申请号：US5993

申请日：1993-01-19

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

IPC分类号： F02M37/00 ,  F02M25/08 ,  F02M33/02 ,  F02B77/00

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。

公开(公告)号：US5305724A

公开(公告)日：1994-04-26

申请号：US20404

申请日：1993-02-22

申请人： Masataka Chikamatsu ,  Shigetaka Kuroda ,  Kazutomo Sawamura ,  Toshihiko Sato ,  Takayoshi Nakayama

发明人： Masataka Chikamatsu ,  Shigetaka Kuroda ,  Kazutomo Sawamura ,  Toshihiko Sato ,  Takayoshi Nakayama

IPC分类号： F02D41/00 ,  F02M25/08 ,  F02M37/04

CPC分类号： F02M25/0809 ,  F02M25/08

摘要： Disclosed is an evaporative fuel purging apparatus used for an internal combustion engine. A canister having an absorbing agent for absorbing an evaporative fuel generated in a fuel tank of the internal combustion engine is provided. A drain control valve is provided on a drain port for opening the canister to the atmospheric air, and which is adapted to open and close the drain port. A purge control valve is provided on a purge passage communicating the canister to a part of an intake system, and which is adapted to purge the evaporative fuel absorbed into the canister through opening and closing the purge passage. A diagnostic device diagnoses the presence or absence of leakage in a purge system which is sealed up by closing the drain control valve and the purge control valve after pressure-reduction treatment. In the above apparatus, the drain control valve is opened after termination of the diagnosis by the diagnostic device, to open the canister to the atmospheric air through the drain port, and after an elapse of a specified time, the purge is started by opening the purge control valve. With this construction, it is possible to prevent the rapid change in the air-fuel ratio in re-starting the purge after termination of the diagnosis for the purge system, and hence to improve the stabilization of the emission and the drivability.

摘要翻译： 公开了一种用于内燃机的蒸发式燃料净化装置。 提供一种具有用于吸收在内燃机的燃料箱中产生的蒸发燃料的吸收剂的罐。 排水控制阀设置在排水口上，用于将罐打开到大气中，并适于打开和关闭排放口。 清洗控制阀设置在净化通道上，该净化通道将罐连通到进气系统的一部分，并且适于通过打开和关闭净化通道来吹扫吸收到罐中的蒸发燃料。 诊断装置诊断在清除系统中是否存在泄漏，其通过在减压处理之后关闭排水控制阀和清洗控制阀而被密封。 在上述装置中，通过诊断装置诊断结束之后，排水控制阀打开，通过排水口将罐排放到大气中，经过规定时间后，通过打开 清洗控制阀。 利用这种结构，可以防止清除系统的诊断结束之后重新启动吹扫的空燃比的快速变化，从而改善排放的稳定性和驾驶性能。

公开(公告)号：US5299545A

公开(公告)日：1994-04-05

申请号：US942875

申请日：1992-09-10

申请人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Masataka Chikamatsu ,  Shoichi Nemoto ,  Takeshi Suzuki

发明人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Masataka Chikamatsu ,  Shoichi Nemoto ,  Takeshi Suzuki

IPC分类号： F02D41/00 ,  F02D41/22 ,  F02M25/08 ,  F02M33/02

CPC分类号： F02M25/0809 ,  F02D41/003 ,  F02D2041/225 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0606 ,  F02D2200/703 ,  F02D41/1454 ,  F02M2025/0845

摘要： An evaporative fuel processing system adapted to be capable of detecting abnormality of an evaporative emission control system for storing, in a canister, evaporative fuel generated from a fuel tank for holding fuel to be supplied to an internal combustion engine, and purging evaporative fuel into the intake system of the engine. A first control valve is arranged across a passage extending between the fuel tank and the canister. A second control valve is arranged across a passage extending between the canister and the intake system of the engine. A third control valve is provided for an air inlet port of the canister communicatable with the atmosphere. Through operating these control valves to open and close them, the evaporative emission control system is negatively pressurized, and abnormality of this system is detected based on the pressure detected in this negatively pressurized state thereof. Timing for carrying out abnormality determination is determined depending on conditions of the fuel tank. Before starting the whole process for abnormality diagnosis of the system, evaporative fuel stored in the canister is allowed to be purged for a predetermined time period. When the temperature of fuel in the fuel tank exceeds a predetermined value, the abnormality determination is inhibited.

摘要翻译： 一种蒸发燃料处理系统，其适于能够检测蒸发排放控制系统的异常，所述蒸发排放控制系统用于将从燃料箱产生的蒸发燃料储存在用于保持要供应到内燃机的燃料中，并将蒸发燃料吹入 发动机进气系统。 第一控制阀横跨在燃料箱和罐之间延伸的通道布置。 第二控制阀跨过在发动机的罐和进气系统之间延伸的通道布置。 第三控制阀设置为可与大气通信的罐的进气口。 通过操作这些控制阀来打开和关闭它们，蒸发排放控制系统被负压，并且基于在其负压状态下检测到的压力来检测该系统的异常。 用于进行异常判定的定时取决于燃料箱的状况。 在开始系统的异常诊断的整个过程之前，允许储存在罐中的蒸发燃料被清洗预定的时间段。 当燃料箱中的燃料的温度超过预定值时，禁止异常判定。