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11.发明授权
公开(公告)号：US5819530A
公开(公告)日：1998-10-13
申请号：US978930
申请日：1992-11-18
IPC分类号： F01N3/20 , F01N3/22 , F01N3/28 , F01N11/00 , F02B77/08 , F02D41/14 , F02D45/00 , G01M15/04 , F01M3/00
CPC分类号： F02D41/1441 , F01N11/007 , F02B77/086 , F01N2550/02 , F01N2900/0422 , Y02T10/22 , Y02T10/47
摘要： A conversion efficiency of a catalyst is determined by a cross correlation function of a cross-correlation between an output of an oxygen sensor at the upstream of the catalyst and an output of an oxygen sensor at the downstream of the catalyst, to thereby monitor deterioration index of the catalyst. Then, an air and fuel ratio is obtained from at least one of the outputs of the two oxygen sensors, to thereby adjust a fuel supply quantity, so that the fuel supply quantity can be controlled even during a period when the catalyst is being analyzed, without deviating the air and fuel ratio from a target air and fuel ratio.
摘要翻译： 催化剂的转化效率由催化剂上游的氧传感器的输出与催化剂下游的氧传感器的输出之间的互相关函数的互相关函数确定，从而监测催化剂的劣化指数 的催化剂。 然后，从两个氧传感器的输出中的至少一个输出获得空气和燃料比，从而调节燃料供给量，从而即使在分析催化剂的期间也能够控制燃料供给量， 而不会使空气和燃料比率与目标空气和燃料比偏离。
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12.发明授权
公开(公告)号：US5400592A
公开(公告)日：1995-03-28
申请号：US194590
申请日：1994-02-10
申请人： Takashi Mukaihira , Toshio Ishii , Yutaka Takaku , Akihito Numata
发明人： Takashi Mukaihira , Toshio Ishii , Yutaka Takaku , Akihito Numata
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A catalytic diagnostic apparatus for determining whether a catalyst of an internal combustion engine has deteriorated as disclosed. Air-fuel ratio sensors are placed at the upstream and downstream sides of the catalytic converter, and the output signal from the upstream air-fuel sensor is used to control the air-fuel mixture provided to the engine via the fuel injectors, in a conventional closed loop operation. Diagnosis of the condition of the catalytic converter is performed only when selected engine operating parameters fall within a predetermined diagnostic range. When the engine is operated in the diagnostic range, the condition of the catalytic converter is analyzed by calculating a deterioration index based on a comparison of the variation of the output signals from the upstream and downstream air-fuel ratio sensors. In a preferred embodiment, a look-up table is provided to correct the deterioration index, based on the intake air flow rate to the engine, and on the cyclic frequency of the variation of the downstream air-fuel ratio sensor.
摘要翻译： 一种用于确定内燃机的催化剂是否已经劣化的催化诊断装置。 空燃比传感器被放置在催化转化器的上游侧和下游侧，并且来自上游空气 - 燃料传感器的输出信号用于通过燃料喷射器控制提供给发动机的空气 - 燃料混合物， 闭环操作。 催化转化器的状态的诊断仅在选定的发动机运转参数落在规定的诊断范围内的情况下进行。 当发动机在诊断范围内操作时，通过基于上游和下游空燃比传感器的输出信号的变化的比较来计算劣化指数来分析催化转化器的状态。 在优选实施例中，提供了一个查找表，用于根据对发动机的进气流量和下游空燃比传感器变化的循环频率来校正劣化指数。
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13.发明授权
公开(公告)号：US5396176A
公开(公告)日：1995-03-07
申请号：US955147
申请日：1992-09-29
申请人： Toshio Ishii , Takashi Mukaihira
发明人： Toshio Ishii , Takashi Mukaihira
CPC分类号： F02P17/12 , F02P2017/125 , F02P2017/128 , F02P5/152 , G01R19/0061
摘要： An apparatus for combustion condition diagnosis has an ionic current detecting circuit for measuring a voltage at the secondary side of the ignition coil of an engine during a plurality of time periods during one operation cycle including a period in which an internal pressure of a cylinder of the engine becomes maximum, under a normal combustion condition. A window generation circuit is provided for establishing the time periods, an integration circuit is provided for integration processing of the measured voltage during each time period, a ROM stores a list indicating combustion condition corresponding to the integrated value for the each time period, and a CPU diagnoses the combustion condition based on the integrated value for the each time period and the list of combustion conditions, in order to decrease erroneous judgement and perform more adequate combustion condition diagnosis.
摘要翻译： 一种用于燃烧条件诊断的装置具有离子电流检测电路，用于在一个操作循环期间的多个时间段内测量发动机的点火线圈的次级侧的电压，包括一个循环的气缸的内部压力 发动机在正常燃烧条件下变为最大。 提供了用于建立时间段的窗口生成电路，提供了用于在每个时间段期间对所测量的电压进行积分处理的积分电路，ROM存储指示对应于每个时间段的积分值的燃烧条件的列表，以及 CPU根据每个时间段的累积值和燃烧条件列表来诊断燃烧条件，以减少错误判断并执行更充分的燃烧条件诊断。
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14.发明授权Ignition current conduction time control apparatus for internal combustion engine 失效用于内燃机的点火电流导通时间控制装置
公开(公告)号：US5199405A
公开(公告)日：1993-04-06
申请号：US697599
申请日：1991-05-09
CPC分类号： F02P3/0552
摘要： An ignition current conduction time control apparatus, comprising power transistors for producing a spark for ignition at the ignition plugs, and a controller for applying ignition signals to the power transistors, wherein the saturated state of the power transistors is eliminated by controlling the start time of current conduction time of said ignition signals applied to the power transistors according to the internal resistance values of the ignition coils, thereby eliminating the heat generation of the ignition coils.
摘要翻译： 一种点火电流导通时间控制装置，包括用于在火花塞处产生用于点火的火花的功率晶体管，以及用于向功率晶体管施加点火信号的控制器，其中功率晶体管的饱和状态通过控制功率晶体管的开始时间 根据点火线圈的内部电阻值施加到功率晶体管的所述点火信号的电流导通时间，从而消除点火线圈的发热。
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公开(公告)号：US5143553A
公开(公告)日：1992-09-01
申请号：US669620
申请日：1991-03-14
CPC分类号： F02P3/0552
摘要： During an abnormal stop condition of an internal combustion engine, the semiconductor devices which control the supply of current to the ignition coils during a dwell time are subject to damage by a high transient current. To prevent this, at least one predetermined time interval is selected on the basis of detected engine temperatures and/or battery supply voltage level and this selected time interval is compared to a time period between reference pulses from a crank angle sensor. When the time period between reference pulses exceeds the selected time interval, a stop condition of the engine is indicated and the semiconductor devices which supply ignition current are controlled to shorten the dwell time or entirely stop the supply of current to the ignition coils.
摘要翻译： 在内燃机的异常停止状态期间，在停留时间期间控制向点火线圈供电的半导体装置受到高瞬态电流的损害。 为了防止这种情况，基于检测到的发动机温度和/或电池电源电压电平来选择至少一个预定时间间隔，并且将该所选择的时间间隔与来自曲柄角传感器的参考脉冲之间的时间段进行比较。 当参考脉冲之间的时间段超过所选择的时间间隔时，指示发动机的停止状态，并且控制提供点火电流的半导体装置以缩短停留时间或完全停止对点火线圈的电流供应。
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