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公开(公告)号：US5676119A
公开(公告)日：1997-10-14
申请号：US719565
申请日：1996-09-25
CPC分类号： F02D41/1495 , F02D41/123
摘要： An air-fuel ratio control system for an internal combustion engine has an exhaust gas component concentration sensor having a sensor element and arranged in the exhaust system of the engine, for detecting concentration of a predetermined component present in exhaust gases emitted from the engine. An ECU controls the air-fuel ratio of an air-fuel mixture supplied to the engine, based on results of comparison between an output value from the sensor and a predetermined reference value, and detects deterioration of the exhaust gas component concentration sensor, based on the output value from the sensor. Engine operating condition sensors detect operating conditions of the engine. It is determined whether or not the engine is in a predetermined engine operating condition in which the sensor element temperature of the exhaust gas component concentration sensor lowers, based on outputs from the engine operating condition sensors. Detection of deterioration of the sensor is inhibited over a predetermined time period after the engine leaves the predetermined operating condition.
摘要翻译： 用于内燃机的空燃比控制系统具有排气组分浓度传感器，该排气组分浓度传感器具有传感器元件并且布置在发动机的排气系统中，用于检测从发动机排出的废气中存在的预定组分的浓度。 ECU根据来自传感器的输出值与规定的基准值的比较结果，控制供给到发动机的空气燃料混合物的空燃比，并基于以下方式检测废气成分浓度传感器的劣化 传感器的输出值。 发动机工况条件传感器检测发动机的运行状况。 基于来自发动机工况条件传感器的输出，确定发动机是否处于排气组分浓度传感器的传感器元件温度降低的预定发动机工作状态。 在发动机离开预定操作状态之后的预定时间段内，抑制传感器劣化的检测。
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公开(公告)号：US4858581A
公开(公告)日：1989-08-22
申请号：US164796
申请日：1988-03-07
申请人： Shuichi Hosoi , Sachito Fujimoto
发明人： Shuichi Hosoi , Sachito Fujimoto
CPC分类号： F02D41/1474 , F02D41/1483 , F02D41/1456
摘要： A method of controlling the air-fuel ratio of a mixture being supplied to an internal combustion engine, in a feedback manner responsive to output from an O.sub.2 sensor arranged in the engine exhaust system for sensing the concentration of a component in exhaust gases from the engine to produce as the output a normally fluctuating output signal indicative of the concentration. The air-fuel ratio is controlled to a desired value by means of at least one of proportional control applying a first correction value to correct the air-fuel ratio when the output signal changes from a rich side to a lean side or vice versa with respect to a predetermined reference value, and integral control applying a second correction value to correct the air-fuel ratio whenever a predetermined period of time elapses so long as the output signal remains on the lean side or on the rich side with respect to the predetermined reference value. At least one of the first and second correction values is set to a smaller first value as load on the engine is higher, and the set at least one correction value is applied to correction of the air-fuel ratio in a direction of enriching the mixture.
摘要翻译： 一种响应于布置在发动机排气系统中的O2传感器的输出的反馈方式来控制供给内燃机的混合物的空燃比的方法，用于感测来自发动机的废气中的组分的浓度 以产生指示浓度的正常波动的输出信号作为输出。 利用第一校正值的比例控制中的至少一个将空燃比控制为期望值，以便当输出信号从富侧变为稀侧时反正空气燃料比，反之亦然，相对于 只要输出信号相对于预定的参考值保持在瘦侧或富侧，只要经过预定时间段，施加第二校正值来校正空燃比的积分控制; 值。 当发动机的负荷较高时，将第一和第二校正值中的至少一个设定为较小的第一值，并且将该至少一个校正值设定为在混合物的富集方向上校正空燃比 。
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公开(公告)号：US4913120A
公开(公告)日：1990-04-03
申请号：US321261
申请日：1989-03-09
申请人： Sachito Fujimoto , Shuichi Hosoi
发明人： Sachito Fujimoto , Shuichi Hosoi
CPC分类号： F02D41/1491
摘要： An air-fuel ratio feedback control method for an internal combustion engine, in which when the engine is operating in a feedback control region, the air-fuel ratio of an air-fuel mixture being supplied to the engine is controlled by the use of a correction coefficient varying in response to the output of an exhaust gas ingredient concentration sensor arranged in the exhaust system of the engine. When the engine has shifted to a predetermined high load region within the feedback control region, in which the rate of change in values of an engine operating parameter is larger than a predetermined value, the air-fuel ratio feedback control is effected by the use of a first average value of the correction coefficient, calculated when the engine is in the predetermined high load region. When the engine has shifted to a second predetermined region within the feedback control region other than the predetermined high load region, the feedback control is effected by the use of a second average value of the correction coefficient, calculated in the second predetermined region, in a manner different from that of calculating the first average value.
摘要翻译： 一种用于内燃机的空燃比反馈控制方法，其中当发动机在反馈控制区域中操作时，通过使用发动机来控制供给发动机的空气燃料混合物的空燃比 校正系数响应于布置在发动机的排气系统中的排气成分浓度传感器的输出而变化。 当发动机已经转移到反馈控制区域内的预定高负荷区域时，其中发动机运转参数值的变化率大于预定值时，空燃比反馈控制通过使用 当发动机处于预定的高负载区域时计算的校正系数的第一平均值。 当发动机已经转移到除了预定高负载区域之外的反馈控制区域内的第二预定区域时，通过使用在第二预定区域中计算的校正系数的第二平均值，在 方式与计算第一平均值的方式不同。
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公开(公告)号：US4926828A
公开(公告)日：1990-05-22
申请号：US310869
申请日：1989-02-14
申请人： Sachito Fujimoto , Shuichi Hosoi
发明人： Sachito Fujimoto , Shuichi Hosoi
CPC分类号： F02D41/1479
摘要： An air-fuel ratio feedback control method for an internal combustion engine in which when the engine is operating in a feedback control region, the concentration of an ingredient in exhaust gases from the engine is detected by an exhaust gas ingredient concentration sensor arranged in the exhaust system of the engine and compared with a reference value, and the air-fuel ratio of an air-fuel mixture to be supplied to the engine is controlled to a desired value in a feedback manner responsive to the result of the comparison. Atmospheric pressure is detected, and the reference value is set to a value depending on the detected value of atmospheric pressure. The reference value is set to a higher value as the detected value of atmospheric pressure is lower. The reference value is set to a lower value when the engine is operating in an idling region than when the engine is operating in a region other than the idling region.
摘要翻译： 一种用于内燃机的空燃比反馈控制方法，其中当发动机在反馈控制区域中操作时，来自发动机的废气中成分的浓度由布置在排气中的排气成分浓度传感器检测 发动机的系统与参考值进行比较，并且响应于比较的结果，将要供应到发动机的空气燃料混合物的空燃比以反馈方式控制到期望值。 检测大气压，根据大气压的检测值将基准值设定为值。 当检测到的大气压值较低时，基准值被设定为较高的值。 当发动机在空转区域中操作时，与在空转区域以外的区域中发动机运转时，基准值被设定为较低的值。
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5.发明授权
公开(公告)号：US4711217A
公开(公告)日：1987-12-08
申请号：US840460
申请日：1986-03-17
申请人： Hidekazu Kano , Takashi Shinchi , Shuichi Hosoi
发明人： Hidekazu Kano , Takashi Shinchi , Shuichi Hosoi
CPC分类号： F02D41/068 , F02D41/2432 , F02D41/2451
摘要： A fuel supply control method for an internal combustion engine in a cold state. A basic value of fuel supply quantity is corrected to an increased value by the use of a correction variable set based upon engine temperature and engine load. Intake air temperature is detected, and the correction variable is corrected by the detected intake air temperature. Preferably, the correction variable is corrected to a larger value as the detected intake air temperature is lower.
摘要翻译： 一种用于冷态的内燃机的燃料供给控制方法。 通过使用基于发动机温度和发动机负荷设定的校正变量将燃料供给量的基本值校正为增加的值。 检测进气温度，通过检测到的进气温度校正校正值。 优选地，随着检测到的进气温度较低，校正变量被校正为更大的值。
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