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公开(公告)号：US5390537A
公开(公告)日：1995-02-21
申请号：US149913
申请日：1993-11-10
CPC分类号： G01M15/11
摘要： A combustion state-detecting system for internal combustion engines has a crank angle sensor which generates a crank angle signal with a predetermined period shorter than a firing period of the spark plug whenever the crankshaft rotates through a predetermined angle. A value of the rotational speed of the engine is detected whenever the crank angle signal is generated. A rate of variation in the detected value of the rotational speed of the engine is calculated over the firing period of the spark plug, and an average value thereof is then calculated. The calculated average value of the variation rate is compared with the calculated variation rate, and a cumulative value of a difference between the calculated variation rate average value and the calculated variation rate is calculated when the calculated variation rate is on the larger deceleration side of the engine rotational speed with respect to the calculated variation rate average value. The calculated difference cumulative value is compared with a predetermined value to determine whether or not the engine is in a degraded combustion state, based on the comparison result.
摘要翻译： 用于内燃机的燃烧状态检测系统具有曲柄角传感器，每当曲轴旋转预定角度时，其产生比火花塞的燃烧时间短的预定时段的曲柄角信号。 每当产生曲轴转角信号时，检测发动机转速的值。 在火花塞的点火期间计算发动机的转速的检测值的变化率，然后计算其平均值。 将所计算的变化率的平均值与计算出的变化率进行比较，计算出的变化率平均值与计算出的变化率之差的累计值，在计算出的变化率在 发动机转速相对于计算的变化率平均值。 将计算的差分累计值与预定值进行比较，以基于比较结果来确定发动机是否处于劣化燃烧状态。
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2.发明授权
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
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。
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公开(公告)号：US5415035A
公开(公告)日：1995-05-16
申请号：US118679
申请日：1993-09-10
CPC分类号： G01M15/11 , F02B2075/027
摘要： A combustion state-detecting system, for internal combustion engines, has a crank angle sensor. The crank angle sensor generates a crank angle signal with a predetermined period shorter than a firing period of the engine whenever the crankshaft rotates through a predetermined angle. A value of the rotational speed of the engine is detected whenever the crank angle signal is generated. A first average value of the detected engine rotational speed is calculated over a period of one rotation of the crankshaft, followed by calculating a second average value of the first average value over every firing period, to thereby calculate a rate of variation in the second average value over every firing period. The rate of variation is compared with a predetermined value, to determine whether or not the engine is in a degraded state of combustion.
摘要翻译： 用于内燃机的燃烧状态检测系统具有曲柄角传感器。 每当曲轴旋转预定角度时，曲轴转角传感器产生比发动机的燃起时间短的预定时间段的曲轴转角信号。 每当产生曲轴转角信号时，检测发动机转速的值。 在曲轴的一次旋转的周期内计算检测到的发动机转速的第一平均值，然后计算每个点火期间的第一平均值的第二平均值，从而计算第二平均值的变化率 每个发射期间的价值。 将变化率与预定值进行比较，以确定发动机是否处于劣化的燃烧状态。
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公开(公告)号：US5373732A
公开(公告)日：1994-12-20
申请号：US149921
申请日：1993-11-10
CPC分类号： G01M15/11
摘要： A combustion state-detecting system for an internal combustion engine calculates a first average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one stroke of a cylinder, and a second average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one cycle of all strokes of the cylinder. The system calculates a difference between the first average speed and the second average speed, and determines based on the difference whether or not the combustion state of the engine is abnormal.
摘要翻译： 用于内燃机的燃烧状态检测系统通过在对应于气缸的一个行程的持续时间的时间段内对发动机的转速进行平均来计算第一平均速度，并且通过对发动机的转速进行平均来平均第二平均速度 发动机在对应于气缸的所有冲程的一个循环的持续时间的时间段内。 系统计算第一平均速度和第二平均速度之差，并且基于发动机的燃烧状态是否异常的差来确定。
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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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6.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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7.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：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
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。
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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。
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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
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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