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1.发明授权
公开(公告)号：US4454847A
公开(公告)日：1984-06-19
申请号：US283914
申请日：1981-07-16
CPC分类号： F02D41/263 , F02D41/047
摘要： A method and an apparatus for controlling the air-fuel ratio in an internal combustion engine in which the calculation of the presumed amount of fuel attached to the wall of the intake port of the engine is effected for correcting the amount of the fuel supplied to the engine in order to compensate for the variation of the air-fuel ratio of the air-fuel mixture used in the combustion of the engine.
摘要翻译： 一种用于控制内燃机中的空燃比的方法和装置，其中，对发动机的进气口壁附近的燃料推定量进行计算，以校正供应给发动机的燃料的量 发动机以补偿在发动机的燃烧中使用的空气燃料混合物的空燃比的变化。
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公开(公告)号：US4430976A
公开(公告)日：1984-02-14
申请号：US312076
申请日：1981-10-16
CPC分类号： F02D41/263 , F02D41/1474 , F02D41/2441 , F02D41/2454 , F02B2075/027
摘要： In a feedback control system for air/fuel ratio control of an internal combustion engine, an integration correcting amount is derived from the output signal of a gas sensor indicative of the concentration of an exhaust gas component, and an engine condition correcting amount is selected from a memory in which a plurality of engine condition correcting amounts are prestored in the form of a map. The engine condition correcting amount is renewed in accordance with the variation in the value of the integration correcting amount only within a given period of time or within an interval corresponding to a given number of rotations of the engine crankshaft from an instant of detection of the variation of the gas sensor output level. Thus, the engine condition correcting amount is renewed only when the output signal level of the gas sensor is reliable. In the case that the gas sensor output level does not change for a relatively long period of time, the integration correction amount is set to a standard value, while the engine condition correcting amount is not changed, using prestored data.
摘要翻译： 在用于内燃机的空气/燃料比控制的反馈控制系统中，从指示排气成分浓度的气体传感器的输出信号得出积分校正量，并且从发动机状态校正量选择 其中以地图的形式预先存储多个发动机状态校正量的存储器。 发动机状态校正量仅在给定的时间段内根据积分校正量的值的变化或在与变化的检测时刻相对应的发动机曲轴的给定转数的单位内更新 的气体传感器输出电平。 因此，仅当气体传感器的输出信号电平可靠时才更新发动机状态校正量。 在气体传感器输出电平在相当长的时间段内没有变化的情况下，使用预先存储的数据，在不改变发动机状态校正量的情况下将积分校正量设定为标准值。
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3.发明授权Closed loop mixture control using learning data resettable for fuel evaporation compensation 失效闭环混合控制采用学习数据可复位为燃料蒸发补偿
公开(公告)号：US4441473A
公开(公告)日：1984-04-10
申请号：US243514
申请日：1981-03-13
CPC分类号： F02D41/2493 , F02D41/2454 , F02D41/2441
摘要： A closed loop mixture control system for internal combustion engines is responsive to a signal derived from an exhaust gas sensor. The sensor signal is time-integrated in a direction depending on the level of the gas sensor output to derive a first mixture corrective setting of the control system. Second corrective settings or learning data are established for the control system in correspondence with the amount of air supplied to the engine. Each of the latter settings is varied as a function of time in a direction depending on the value of the time-varying first corrective setting relative to a reference so that the second settings are automatically updated to meet varying engine performance such as aging. One of the second corrective settings is selected in response to the detected quantity of the supplied air and multiplied by the first corrective setting to correct the basic mixture control setting of the system toward an optimum value. All of the second corrective settings are reset to appropriate values, for example, "1" at the instant the engine is started if an average value of the second settings is greater than a predetermined value to compensate for different fuel vaporizations.
摘要翻译： 用于内燃机的闭环混合控制系统响应于从废气传感器得到的信号。 传感器信号根据气体传感器输出的电平在一个方向上进行时间积分，以得出控制系统的第一个混合校正设置。 与控制系统建立对应于发动机供给的空气量的第二校正设置或学习数据。 后一种设置中的每一种根据时间变化的第一校正设置的值相对于参考值的方向随时间的变化而变化，使得第二设置被自动更新以满足诸如老化的变化的发动机性能。 响应于所检测到的供给空气量而选择第二校正设置中的一个，并乘以第一校正设置，以将系统的基本混合控制设置校正为最佳值。 如果第二设置的平均值大于预定值以补偿不同的燃料蒸发，则所有第二校正设置被重置为适当的值，例如在启动发动机的时刻为“1”。
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4.发明授权
公开(公告)号：US5279114A
公开(公告)日：1994-01-18
申请号：US996811
申请日：1992-12-23
CPC分类号： F01N11/007 , F02D41/1443 , F01N2470/14 , F01N2550/02 , Y02T10/47
摘要： Disclosed is an apparatus for detecting deterioration of a catalyst of an internal combustion engine having a plurality of cylinder banks in such a manner that the deterioration of the catalyst can be assuredly discriminated regardless of the presence of deviation of a control phase with respect to each cylinder bank. The influence of change of the air/fuel ratio can be eliminated considerably by reducing the air/fuel ratio correction coefficient for a right bank, or by also using the correction coefficient for the left bank as that for the right bank to cause the phases of them to be synchronized with each other, or by dither-controlling the right bank. Therefore, the change of the air/fuel ratio with respect to the left bank can be assuredly detected while necessitating one sub air/fuel ratio sensor. By discriminating the state of deterioration of the catalyst in accordance with results of detections made by the left air/fuel ratio sensor and the sub air/fuel ratio sensors, the deterioration of the catalyst can be assuredly discriminated regardless of the presence of deviation of control phase with respect to the two banks.
摘要翻译： 公开了一种用于检测具有多个气缸组的内燃机的催化剂的劣化的装置，使得可以可靠地区分催化剂的劣化，而不管控制阶段相对于每个气缸的偏差是否存在 银行。 空燃比变化的影响可以通过降低右岸的空燃比校正系数而得到很大的消除，也可以利用左岸的校正系数作为右岸的校正系数， 他们要彼此同步，或者通过抖动控制右边的银行。 因此，在需要一个副空气/燃料比传感器的同时，能够可靠地检测空气/燃料比相对于左岸的变化。 通过根据左空燃比传感器和副空气/燃料比传感器的检测结果来区分催化剂的劣化状态，可以可靠地区分催化剂的劣化，而不管控制的偏差是否存在 相对于两家银行。
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公开(公告)号：US4640257A
公开(公告)日：1987-02-03
申请号：US729145
申请日：1985-04-30
CPC分类号： F02D41/0072 , F02D41/1482 , F02D41/1483 , Y02T10/47
摘要： In engine control apparatus with exhaust gas recirculation control and air/fuel ratio feedback control, the amount of recirculated exhausted gasses is accurately detected so as to operate an internal combustion engine under an optimal operating condition all the time. To this end a correction factor derived from oxygen sensor output, which is used for air/fuel ratio control, is monitored to obtain a difference of a correction factor value resulted from engine operation with EGR and another correction factor value resulted from engine operation with EGR. This difference is obtained by forcibly interrupting EGR operation. Once the amount of recirculated exhaust is accurately estimated, the EGR control and/or air/fuel ratio control are performed with compensation for possible error due to secular change in EGR system.
摘要翻译： 在具有废气再循环控制和空燃比反馈控制的发动机控制装置中，精确地检测再循环排气的量，以便始终在最佳操作条件下操作内燃机。 为此，监测由用于空气/燃料比控制的氧传感器输出得到的校正因子，以获得由EGR发动机运转引起的校正系数值与由EGR发动机运转产生的另一校正系数值之差 。 该差异是通过强制中断EGR操作获得的。 一旦准确估计再循环废气的量，则EGR调节和/或空气/燃料比控制是通过补偿由于EGR系统的长期变化引起的可能误差来进行的。
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6.发明授权
公开(公告)号：US5964202A
公开(公告)日：1999-10-12
申请号：US33501
申请日：1998-03-02
申请人： Noboru Takagi , Katsuhiko Kodama
发明人： Noboru Takagi , Katsuhiko Kodama
CPC分类号： F02D31/003 , F02D11/10
摘要： It is an object of the present invention to provide a controlling apparatus for throttle valve that detects a throttle open degree enabling more appropriate controls by removing ill effects of multiplexing an idle control in controlling data. The idle control amount is canceled by subtracting the idle target open degree from the detected throttle open degree. Further, in order to correct differences of the detected data due to a response delay of the throttle valve, the previous measured value is regarded as the detected throttle open degree when the response delay occurs.
摘要翻译： 本发明的目的是提供一种用于节流阀的控制装置，该控制装置通过消除在控制数据中复用空闲控制的不良影响来检测节气门开度，从而实现更适当的控制。 通过从检测到的节气门开度减去空转目标开度来消除怠速控制量。 此外，为了校正由于节流阀的响应延迟引起的检测数据的差异，当发生响应延迟时，先前的测量值被认为是检测到的节气门开度。
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公开(公告)号：US5406927A
公开(公告)日：1995-04-18
申请号：US079807
申请日：1993-06-22
申请人： Tatsunori Kato , Katsuhiko Kodama , Koji Okawa , Mitsuru Takada
发明人： Tatsunori Kato , Katsuhiko Kodama , Koji Okawa , Mitsuru Takada
CPC分类号： F02D41/2448 , F02D41/0045 , F02D41/2454 , F02D41/0042
摘要： An air-fuel ratio control apparatus constructed, in an engine of a type storing evaporated fuel generated in a fuel tank in a canister and thereafter drawing off the evaporated fuel to an intake side of an engine through a bleedoff passage, so as to inhibit renewal of an air-fuel ratio learning value when the evaporated fuel concentration is at a predetermined value or higher in case of learning and renewal of an air-fuel ratio in order to make feedback control of the air-fuel ratio of an air-fuel mixture supplied to the engine. In an apparatus which adsorbs evaporated fuel generated in a fuel tank in a canister and purges the evaporated fuel adsorbed in the canister to an intake side of an internal combustion engine together with air through a purge valve, an air-fuel ratio learning value is renewed in accordance with a deviation between an air-fuel ratio feedback FAF value detected by an oxygen sensor and a FAFSM value obtained by smoothing the FAF value with a large smoothing constant. Further, renewal of the air-fuel ratio learning value is inhibited when the concentration of the evaporated fuel is high, and renewal of the air-fuel ratio learning value is executed even during purge execution by the purge valve when the concentration is low.
摘要翻译： 一种空燃比控制装置，其构造为在罐中的燃料箱中产生的蒸发燃料的发动机中，并且随后通过泄流通道将蒸发的燃料吸入发动机的进气侧，以便禁止更新 在空燃比学习和更新的情况下，当蒸发燃料浓度处于预定值或更高时的空燃比学习值，以便对空燃比混合物的空燃比进行反馈控制 提供给发动机。 在吸附在罐中的燃料箱中产生的蒸发燃料的装置中，通过净化阀与空气一起将吸附在罐中的蒸发燃料清除到内燃机的进气侧，空燃比学习值被更新 根据由氧传感器检测的空燃比反馈FAF值与通过以大的平滑常数对FAF值进行平滑而获得的FAFSM值之间的偏差。 此外，当蒸发燃料的浓度高时，空燃比学习值的更新被抑制，并且即使在浓度低时由排气阀进行清洗执行期间也执行空燃比学习值的更新。
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公开(公告)号：US5299546A
公开(公告)日：1994-04-05
申请号：US52926
申请日：1993-04-27
CPC分类号： F02M25/08 , F02D41/0045 , F02D41/2448 , F02D41/2454 , F02D41/0042
摘要： An air-fuel ratio control apparatus for an internal combustion engine for learning and controlling an air-fuel ratio accurately even during execution of purging of evaporated fuel. The evaporated fuel generated in a fuel tank is adsorbed to a canister, and the adsorbed fuel is evaporated and purged together with air to the intake side of the internal combustion engine through a purge valve. During normal purge rate control by the purge valve, air-fuel ratio feedback values detected by an oxygen sensor are averaged, and the concentration of the evaporated fuel taken into the internal combustion engine through the purge valve is detected by the deviation from a stoichiometric air-fuel ratio 1 of the averaged value and the purge rate. Further, after the lapse of a predetermined period of time after purging is started, air-fuel ratio learning values are renewed in accordance with the air-fuel ratio feedback value and stored in a RAM.
摘要翻译： 一种用于内燃机的空燃比控制装置，用于即使在执行蒸发燃料的吹扫期间也能够精确地学习和控制空燃比。 在燃料箱中产生的蒸发燃料被吸附到罐上，吸附的燃料通过净化阀与空气一起被蒸发并与内燃机的进气侧一起吹扫。 在通过吹扫阀的正常吹扫速率控制期间，由氧传感器检测的空燃比反馈值被平均化，并且通过吹扫阀吸入内燃机的蒸发燃料的浓度通过与化学计量空气的偏差来检测 - 平均值的燃料比1和吹扫速率。 此外，在清洗开始经过预定时间段之后，空燃比学习值根据空燃比反馈值更新并存储在RAM中。
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