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    • 2. 发明授权
    • Misfire detection method based on a change in crankshaft rotation
    • 基于曲轴旋转变化的失火检测方法
    • US5506778A
    • 1996-04-09
    • US157160
    • 1994-02-03
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeYasuhisa YoshidaMitsuhiko YanagisawaHiroyuki NakajimaKoichi Namiki
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeYasuhisa YoshidaMitsuhiko YanagisawaHiroyuki NakajimaKoichi Namiki
    • F02D41/14G01M15/11F01L25/00
    • G01M15/11F02D41/1498F02D2200/1015
    • A misfire detection method is provided, which method makes it possible to accurately detect the occurrence/absence of misfire by eliminating a detection error in misfire detection. This error is caused by a vibrational increase or decrease of the rotational changing rate of a crankshaft after a misfire state occurs. A processor, which receives pulse outputs from a crank angle sensor, calculates in sequence angular accelerations D.omega..sub.n-2, D.omega..sub.n-1, D.omega..sub.n, and D.omega..sub.n+1 in crank angle areas which correspond to a preceding cylinder, two cylinders checked for misfire, and a succeeding cylinder, respectively. If the values D.omega..sub.n-1 and D.omega..sub.n n significantly decrease in comparison with the values D.omega..sub.n-2 and D.omega..sub.n-1, respectively, then it is tentatively determined that misfire has occurred in both cylinders checked. Then If the value D.omega..sub.n+1 significantly increases compared to the value D.omega..sub.n, then the restoration to the normal combustion state is confirmed, and the occurrence of misfire in the two cylinders checked is definitely determined.
    • PCT No.PCT / JP93 / 00766 Sec。 371日期:1994年2月3日 102(e)1994年2月3日PCT PCT 1993年6月8日PCT公布。 出版物WO93 / 25811 PCT 日期:1993年12月23日。提供了一种失火检测方法,该方法使得能够通过消除失火检测中的检测误差来准确地检测失火的发生/不存在。 该误差是由发生失火状态后曲轴的旋转变化率的振动增加或减小引起的。 接收来自曲柄角传感器的脉冲输出的处理器根据先前的圆柱体的曲轴角度区域中的角加速度D omega n-2,D omega n-1,D omega n和D omega n + ,两个气瓶分别检查失火,和一个后续的气缸。 如果值D omega n-1和D omega n n分别与值Dωn-2和Dωn-1相比显着降低,则暂时确定在检查的两个气缸中都发生失火。 那么如果值D omega n + 1与值D omega n相比显着增加,则确认到正常燃烧状态的恢复,并且确定了检查的两个气缸中失火的发生。
    • 3. 发明授权
    • Fault diagnosis apparatus for a fuel evaporative emission supressing
system
    • 用于燃料蒸发排放抑制系统的故障诊断装置
    • US5651351A
    • 1997-07-29
    • US647966
    • 1996-08-01
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeHitoshi KamuraYasuhisa Yoshida
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeHitoshi KamuraYasuhisa Yoshida
    • F02M25/08
    • F02M25/0809
    • A fault diagnosis apparatus for detecting a fault in a fuel evaporative emission suppressing system, if it is concluded that an engine (1) is being operated in an operating state fulfilling fault diagnosis execution conditions, detects the current valve opening position of an idling speed control (ISC) valve (8) and then drives a purge control valve (46) to open the same. If a relatively high load is applied to the engine at this time, the threshold value determining the operating sensitivity of the ISC valve is so corrected as to be decreased. When a predetermined period of time has elapsed from the moment when the valve opening position of the ISC valve is detected, the valve opening position of the ISC valve is detected again. If the deviation between these valve opening positions is not larger than the threshold value, it is concluded that the purge air introduction by the drive of the purge control valve is not performed, that is, it is concluded that the valve is faulty. Since the operating sensitivity of the ISC valve increases as an engine load increases, erroneous diagnosis is prevented.
    • PCT No.PCT / JP95 / 01972 Sec。 371日期:1996年8月1日 102(e)日期1996年8月1日PCT 1995年9月28日PCT公布。 公开号WO96 / 10691 日期1996年4月11日用于检测燃料蒸发排放抑制系统中的故障的故障诊断装置,如果判断为在满足故障诊断执行条件的运行状态下运转发动机(1),则检测当前阀开度位置 的空转速度控制(ISC)阀(8),然后驱动清洗控制阀(46)打开它。 如果此时对发动机施加相当高的负荷,则确定ISC阀的操作灵敏度的阈值被校正为减少。 当从检测到ISC阀的开阀位置开始经过预定的时间段时,再次检测ISC阀的开阀位置。 如果这些阀打开位置之间的偏差不大于阈值,则得出结论,不执行通过清洗控制阀的驱动的吹扫空气引入,即判断为阀故障。 由于ISC阀的运行灵敏度随着发动机负荷的增加而增加,因此可以防止误诊。
    • 6. 发明授权
    • Apparatus and method for determining a failure of an EGR apparatus
    • 用于确定EGR装置的故障的装置和方法
    • US5542400A
    • 1996-08-06
    • US490010
    • 1995-06-13
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeHitoshi KamuraYasuhisa Yoshida
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeHitoshi KamuraYasuhisa Yoshida
    • F02M25/07G01M15/00
    • F02M26/49F02M26/57
    • An apparatus for determining a failure of an exhaust gas recirculation (EGR) apparatus includes an electronic control unit. When judging the fulfillment of the failure diagnosis executing condition, the electronic control unit stores the intake pressure detected by a pressure sensor, and then introduces part of the exhaust gas from an engine to an intake passage via an EGR passage to start the EGR for failure diagnosis. Thereafter, the intake pressure is detected again. If a significant change in intake pressure does not occur before and after the execution of the EGR for failure diagnosis, it is judged that the EGR apparatus is faulty. If the failure diagnosis executing condition becomes unfulfilled during the execution of failure diagnosis, the EGR for failure diagnosis is stopped, and the failure diagnosis entailing EGR is prohibited from the time when the EGR for failure diagnosis is stopped until a predetermined period of time has elapsed, by which the deterioration in riding quality and drivability of the vehicle is prevented.
    • 用于确定废气再循环(EGR)装置的故障的装置包括电子控制单元。 在判断故障诊断执行条件的实现时,电子控制单元存储由压力传感器检测的进气压力,然后经由EGR通路将来自发动机的排气的一部分引入到进气通路,以启动用于故障的EGR 诊断。 此后再次检测进气压力。 如果在用于故障诊断的EGR执行之前和之后没有发生进气压力的显着变化,则判断为EGR装置有故障。 如果在故障诊断执行期间故障诊断执行条件变得未满足,则停止用于故障诊断的EGR,并且在停止用于故障诊断的EGR直到经过预定时间段之后禁止引起EGR的故障诊断 能够防止车辆的乘坐质量和驾驶性能的恶化。
    • 9. 发明授权
    • Apparatus for deterioration diagnosis of an exhaust purifying catalyst
    • 废气净化催化剂劣化诊断装置
    • US5732552A
    • 1998-03-31
    • US599314
    • 1996-02-09
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeToshiro NomuraHidetsugu Kanao
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeToshiro NomuraHidetsugu Kanao
    • F01N11/00F01N3/20
    • F01N11/007F01N2550/02F01N2900/0422Y02T10/22Y02T10/47
    • A deterioration diagnostic apparatus for a three-way catalyst includes an electronic control unit, which obtains a frequency of reversals of the changing direction in which the output of an upstream-side O.sub.2 sensor changes, based on the number of times the output voltage of the O.sub.2 sensor crosses a threshold. Also, the control unit obtains a frequency of reversals of the changing direction in which the output of a downstream-side O.sub.2 sensor changes, based on the number of times the output voltage of the downstream-side O.sub.2 sensor crosses upper and lower reversal reference values which are obtained by adding and subtracting a hysteresis constant to and from an average value of input values of the downstream-side O.sub.2 sensor output voltage. The control unit further obtains the ratio of the reversal frequency of the downstream-side sensor output to the reversal frequency of the upstream-side sensor output, and diagnoses deterioration of the three-way catalyst when the reversal frequency ratio has become greater than a predetermined value.
    • 用于三元催化剂的劣化诊断装置包括电子控制单元,其基于上游侧O2传感器的输出改变的次数获得上游侧O2传感器的输出变化的变化方向的反转频率 O2传感器超过阈值。 此外,控制单元根据下游侧O2传感器的输出电压与上下反转基准值相交的次数,得到下游侧O2传感器的输出变化的变化方向的反转频率 其通过向下游侧O2传感器输出电压的输入值的平均值加减去滞后常数而得到。 控制单元还获得下游侧传感器输出的反转频率与上游侧传感器输出的反转频率的比,并且当反转频率比已经变得大于预定频率比时,诊断三元催化剂的劣化 值。
    • 10. 发明授权
    • Control apparatus for an internal combustion engine
    • 一种用于内燃机的控制装置
    • US6047679A
    • 2000-04-11
    • US61185
    • 1998-04-17
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeSeiichi Inoue
    • Takuya MatsumotoToru HashimotoMitsuhiro MiyakeSeiichi Inoue
    • F02D11/10F02D41/22F02D41/30F02D1/00
    • F02D41/22F02D11/107F02D41/3076F02D2041/227F02D2200/602F02D2400/08F02D41/3029
    • A control apparatus for an internal combustion engine is applied to vehicles equipped with a so-called drive by wire. When one of several control systems within the control apparatus fails, the drive is urged to obtain repairs. Also, even when all of the several control systems of the drive by wire fail and the failures of these control systems cannot be detected, unpredictable motion of the throttle valve can be prevented, thereby enhancing vehicle safety. The present invention includes a plurality of electronic throttle control systems for electrically driving a throttle valve of an internal combustion engine, a failure detecting mechanism for detecting failures of the electronic throttle control systems, intake air volume control mechanism for driving the throttle valve in a closing direction and also supplying a predetermined intake air volume to the internal combustion engine if it is judged that all electronic throttle control systems have failed, and output suppression mechanism for controlling the driving of the throttle valve by a normal electronic throttle control system and also suppressing output of the internal combustion engine corresponding to the operational quantity of the accelerator pedal if the failure determining mechanism determines that one electronic throttle control system among the several electronic throttle control systems has failed.
    • 用于内燃机的控制装置应用于配备有所谓的线驱动的车辆。 当控制装置内的多个控制系统之一失效时,驱动器被迫进行维修。 此外,即使由于电线的驱动的多个控制系统全部失败而不能检测到这些控制系统的故障,也可以防止节流阀的不可预测的运动,从而提高车辆的安全性。 本发明包括用于电驱动内燃机的节气门的多个电子节气门控制系统,用于检测电子节气门控制系统的故障的故障检测机构,关闭时驱动节气门的进气量控制机构 方向,并且如果判断所有电子节气门控制系统都已经发生故障,还向内燃机提供预定的进气量,以及通过普通电子节气门控制系统控制节气门的驱动的输出抑制机构,并且还抑制输出 如果所述故障确定机构确定所述几个电子节气门控制系统中的一个电子节气门控制系统已经失败,则所述内燃机对应于所述加速器踏板的操作量。