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1.发明授权
公开(公告)号：US5575267A
公开(公告)日：1996-11-19
申请号：US537293
申请日：1995-09-29
申请人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Hitoshi Kamura , Yasuhisa Yoshida , Hidetsugu Kanao , Toshiro Nomura
发明人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Hitoshi Kamura , Yasuhisa Yoshida , Hidetsugu Kanao , Toshiro Nomura
CPC分类号： F02D41/221 , F02M25/0809 , Y02T10/40
摘要： A fault diagnosis apparatus for detecting a fault in a fuel evaporative emission suppressing system comprises an electronic control unit. When fault diagnosis execution conditions are fulfilled, the electronic control unit stores an average of integral term values for air-fuel ratio feedback control, operating position of an idling speed control valve, and engine speed, and then actuates a purge control valve of the suppressing system so that the valve opens. In a predetermined time period after the actuation of the purge control valve, the integral term average and the like are stored again. If any changes of the integral term average and other values caused by the actuation of the purge control valve are detected, the suppressing system is concluded to be normal. If no changes are detected, on the other hand, the suppressing system is concluded to be faulty.
摘要翻译： 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包括电子控制单元。 当满足故障诊断执行条件时，电子控制单元存储空燃比反馈控制的积分项值，空转速度控制阀的操作位置和发动机转速的平均值，然后启动抑制 系统使阀门打开。 在清除控制阀的致动之后的预定时间段内，再次存储积分项平均值等。 如果检测到由清除控制阀的致动引起的积分项平均值和其他值的任何变化，则抑制系统被认定为正常。 另一方面，如果没有检测到变化，则抑制系统被认定为有故障。
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公开(公告)号：US5542400A
公开(公告)日：1996-08-06
申请号：US490010
申请日：1995-06-13
摘要： 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.
摘要翻译： 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。
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3.发明授权
公开(公告)号：US5651351A
公开(公告)日：1997-07-29
申请号：US647966
申请日：1996-08-01
IPC分类号： F02M25/08
CPC分类号： F02M25/0809
摘要： 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.
摘要翻译： 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。
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4.发明授权Apparatus for detecting reduction of purifying capacity of catalyst for purifying exhaust gas from internal combustion engine and method thereof 失效用于检测来自内燃机的净化废气的催化剂的净化能力的降低的装置及其方法
公开(公告)号：US5743082A
公开(公告)日：1998-04-28
申请号：US535641
申请日：1995-09-28
CPC分类号： F01N11/007 , B01D53/8696 , B01D53/9495 , F01N2550/02 , F01N2900/0422 , Y02T10/22 , Y02T10/47
摘要： A detecting apparatus for a catalytic converter has a pair of O.sub.2 sensors, arranged individually on the up- and downstream sides of the converter, and an electronic control unit for discriminating reduction of the purifying capacity of a three-way catalyst in the converter. This unit discriminates the reduction of the purifying capacity in accordance with the comparison between a decision value and the ratio between the respective frequencies of outputs from the O.sub.2 sensors. In the case where the O.sub.2 sensor on the upstream side is subject to thermal degradation, its decision value is corrected, or the decision itself is interrupted.
摘要翻译： 用于催化转化器的检测装置具有分别设置在转换器的上游侧和下游侧的一对O 2传感器，以及用于区分转换器中三元催化剂的净化能力降低的电子控制单元。 该单元根据判定值和来自O2传感器的各个输出频率之间的比较来鉴别净化容量的降低。 在上游侧的O2传感器经受热降解的情况下，其判定值被校正，或判定本身被中断。
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公开(公告)号：US5808186A
公开(公告)日：1998-09-15
申请号：US142481
申请日：1994-02-02
申请人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Yasuhisa Yoshida , Mitsuhiko Yanagisawa , Hiroyuki Nakajima , Koichi Namiki , Satoshi Kasai
发明人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Yasuhisa Yoshida , Mitsuhiko Yanagisawa , Hiroyuki Nakajima , Koichi Namiki , Satoshi Kasai
CPC分类号： F02D41/22 , F02D41/1498 , F02D41/222 , G01M15/11 , F02D2200/1015 , F02D2200/702 , F02D41/0097
摘要： A method for detecting a misfire by fluctuation in crankshaft rotation in which the occurrence of a misfire can be detected exactly by eliminating the effect of detection error in detecting the fluctuation in crankshaft rotation, caused by the error in the construction of a crank angle sensor. By succeedingly receiving pulses from the crank angle sensor, a processor detects a time interval taken from the entering into a crankshaft rotation angle region, relating to a cylinder corresponding to both pulses, to the leaving therefrom (S2), calculates the crankshaft angular acceleration D.omega..sub.n by using the correction factor calculated on the basis of the above detected time interval, and the time interval determined by dividing the time taken for one rotation of the crankshaft by the number of cylinders (S3, S4), the latter interval being free from sensor error, and detects the occurrence of a misfire when the calculated value D.omega..sub.n is less than the decision value (S5 through S7).
摘要翻译： PCT No.PCT / JP93 / 00765 Sec。 371日期：1994年2月2日 102（e）日期1994年2月2日PCT提交1993年6月8日PCT公布。 出版物WO93 / 25810 日期：1993年12月23日一种用于通过消除检测误差对检测曲轴旋转的波动的影响，可以精确地检测发生失火的曲轴旋转发生的失火的方法， 曲柄角传感器 通过从曲轴转角传感器继续接收脉冲，处理器检测从进入到与两个脉冲对应的气缸的曲轴旋转角度区域进入曲轴旋转角度区域的时间间隔（S2），计算曲轴角加速度D 通过使用基于上述检测到的时间间隔计算的校正因子和通过将曲轴的一次旋转所花费的时间除以气缸数（S3，S4）确定的时间间隔，后一个间隔是空闲的 并且当计算值Dωn小于判定值时，检测发生失火（S5至S7）。
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公开(公告)号：US5506778A
公开(公告)日：1996-04-09
申请号：US157160
申请日：1994-02-03
申请人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Yasuhisa Yoshida , Mitsuhiko Yanagisawa , Hiroyuki Nakajima , Koichi Namiki
发明人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Yasuhisa Yoshida , Mitsuhiko Yanagisawa , Hiroyuki Nakajima , Koichi Namiki
CPC分类号： G01M15/11 , F02D41/1498 , F02D2200/1015
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US5513616A
公开(公告)日：1996-05-07
申请号：US202161
申请日：1994-02-25
CPC分类号： F02D41/0055 , F02M26/49 , F02B1/04 , F02D2200/0406 , F02M26/57 , Y02T10/47
摘要： A method for determining a failure of an exhaust gas recalculation (EGR) apparatus in which a failure of the EGR apparatus is determined by determining whether a difference between an intake manifold pressure developed when an EGR valve is open and that developed when the EGR valve is closed falls within a specified range, the EGR valve being temporarily opened and closed while failure determination is being implemented. The failure determination is aborted so as to prevent erroneous determination, if a variation of the engine speed exceeds a specified value during the failure determination, or if a variation of the opening degree of an idling speed control (ISC) valve, disposed in a bypass passage installed in an intake passage of an engine in a manner bypassing a throttle valve, exceeds a specified value during the failure determination, or if a fuel control mode changes during the failure determination. Alternatively, to prevent erroneous determination, an intake manifold pressure difference is corrected in accordance with a variation of the engine speed or a variation of the ISC valve opening degree during the failure determination, or the ISC valve opening degree is fixed during the failure determination.
摘要翻译： 一种用于确定废气再循环（EGR）装置的故障的方法，其中，通过确定在EGR阀打开时产生的进气歧管压力与EGR阀为开路时所形成的进气歧管压力之间的差异是否确定EGR装置的故障 关闭落在指定范围内，在执行故障确定的同时，EGR阀暂时打开和关闭。 故障确定中止，以防止在故障确定期间发动机转速的变化超过规定值，或者设置在旁路中的空转速度控制（ISC）阀的开度的变化时的错误判定 在故障判定期间，以旁路节气门的方式安装在发动机的进气通路中的通道超过规定值，或者在故障判定期间燃料控制模式发生变化。 或者，为了防止错误判定，根据发动机转速的变化或故障判定时的ISC阀开度的变化，或者在故障判定期间ISC阀开度固定，校正进气歧管压差。
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公开(公告)号：US5452604A
公开(公告)日：1995-09-26
申请号：US190541
申请日：1994-02-02
CPC分类号： G01M15/11
摘要： A misfire detection method based on fluctuation in crankshaft rotation, in which a time interval required for the crankshaft to rotate over an angle region associated with a cylinder checked for misfire is detected in response to pulses supplied from a crank angle sensor having vanes. Next, a deviation of the crankshaft angular acceleration D .omega..sub.n, calculated based on the thus detected time interval and corresponding to the cylinder checked for misfire, from the angular acceleration D .omega..sub.n-3, corresponding to a cylinder belonging to the cylinder group to which the cylinder checked for misfire belongs, is compared with a determination value, and an occurrence/absence of misfire is detected in accordance with a result of the comparison. By using the deviation between the angular acceleration values calculated based on the time intervals detected through the use of the same vane, the bad effect of structural errors of the vanes is canceled, to thereby prevent erroneous misfire detection caused by the vane errors.
摘要翻译： 响应于从具有叶片的曲柄角传感器提供的脉冲，检测基于曲轴旋转波动的失火检测方法，其中曲轴在与检查失火的气缸相关联的角度区域中旋转所需的时间间隔。 接下来，将基于由此检测到的时间间隔计算出的曲轴角加速度D omega n与对应于检查失火的气缸相对应于属于气缸组的气缸的角加速度Dωn-3的偏差相对于 将检查失火的气缸所属的位置与确定值进行比较，并且根据比较结果检测是否发生失火。 通过使用基于通过使用同一叶片检测的时间间隔计算的角加速度值之间的偏差，叶片的结构误差的不良影响被消除，从而防止由叶片误差引起的错误失火检测。
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公开(公告)号：US5587909A
公开(公告)日：1996-12-24
申请号：US150063
申请日：1993-11-18
CPC分类号： G01M15/11 , G01L19/147 , F02D2200/702
摘要： A misfire detecting method is provided for preventing erroneous detection by prohibiting misfire detection when it is judged that an internal combustion engine is operating in a particular operating condition in which load on the engine can suddenly change, wherein a processor for repeatedly executing a misfire detection process immediately ends the present cycle of the misfire detection process when it is judged that the engine has just been started (S3), when it is judged that the igniton key has just been turned off (S4), or when it is judged that the engine is decelerating, that the transmission is performing a shift operation, or that the vehicle is running on a rough road (S5-7), to thereby avoid erroneous detection which is liable to occur during rough-road travel etc.
摘要翻译： PCT No.PCT / JP93 / 00764 Sec。 371日期：1993年11月18日 102（e）日期1994年1月18日PCT提交1993年6月8日PCT公布。 公开号WO93 / 25809 日期：1993年12月23日提供一种失火检测方法，用于当判断内燃机在发动机的负荷突然变化的特定运行状态下运行时，通过禁止失火检测来防止错误检测，其中，重复处理器 当判断出发动机刚刚起动时，执行失火检测处理立即结束当前的失火检测处理的周期（S3），当判断为点火钥匙刚刚被关闭（S4）时，或当 判断发动机正在减速，变速器正在进行变速操作，或车辆在粗糙的道路上行驶（S5-7），从而避免在粗车行驶期间容易发生的错误检测。
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公开(公告)号：US5423203A
公开(公告)日：1995-06-13
申请号：US92527
申请日：1993-07-16
IPC分类号： F02D41/14 , F02D45/00 , G01N27/26 , G01N27/409 , G01M19/00
CPC分类号： F02D41/1495 , F01N2550/00 , F01N2560/025
摘要： A failure determination method for an O.sub.2 sensor is provided wherein the air-fuel ratio of a mixture is maintained at a value which produces a leaner or richer air-fuel ratio than a stoichiometric ratio by a predetermined value, for a predetermined time after an engine starts operating in an idle region, to thereby make the oxygen concentration of exhaust gas surrounding the O.sub.2 sensor uniform. Subsequently, the air-fuel ratio is forcibly subjected to an oscillatory change with a predetermined amplitude of .+-.10 to 15% of the stoichiometric ratio with respect to the stoichiometric ratio at a predetermined frequency of several Hz, to determine abnormality of the O.sub.2 sensor based on the change of the output voltage of the O.sub.2 sensor.
摘要翻译： 提供了一种用于O2传感器的故障判定方法，其中混合物的空燃比在发动机之后的预定时间内保持在比化学计量比更精细或更丰富的空燃比产生预定值的值 开始工作在空闲区域，从而使O2传感器周围的排气的氧气浓度均匀。 随后，相对于以几Hz的预定频率的化学计量比，空燃比被强制地以相对于化学计量比的+/- 10至15％的预定振幅进行振荡变化，以确定O 2的异常 传感器基于O2传感器输出电压的变化。
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