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1.发明授权
公开(公告)号：US4831838A
公开(公告)日：1989-05-23
申请号：US124412
申请日：1987-11-17
CPC分类号： F02D41/2454 , F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors including an air-fuel ratio correction amount. Also, a learning correction amount is calculated so that a mean value of the air-fuel ratio correction amount is brought close to a reference value. The actual air-fuel ratio is further adjusted in accordance with the learning correction amount.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调整， 包括空燃比校正量的侧面空燃比传感器。 此外，计算学习校正量，使得空燃比校正量的平均值接近参考值。 根据学习校正量进一步调整实际的空燃比。
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2.发明授权
公开(公告)号：US4712373A
公开(公告)日：1987-12-15
申请号：US849839
申请日：1986-04-09
CPC分类号： F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, the actual air-fuel ratio is adjusted in accordance with the output of the upstream-side and downstream-side air-fuel ratio sensors. For a predetermined time period after the engine enters an air-fuel ratio feedback control for the downstream-side air-fuel ratio sensor, the control speed by the downstream-side air-fuel ratio sensor is increased.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调节， 侧空燃比传感器。 在发动机进入下游侧空燃比传感器的空燃比反馈控制之后的预定时间段内，下游侧空燃比传感器的控制速度增加。
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3.发明授权
公开(公告)号：US4707984A
公开(公告)日：1987-11-24
申请号：US850619
申请日：1986-04-11
IPC分类号： F02D41/14
CPC分类号： F02D41/1439 , F02D41/1441 , F02D41/1488
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side air-fuel ratio sensor and the downstream-side air-fuel ratio sensor. The adjustment of the actual air-fuel ratio by the downstream-side air-fuel ratio sensor is prohibited in accordance with a coolant temperature of the engine.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧空气燃料的输出 比传感器和下游侧空燃比传感器。 根据发动机的冷却剂温度，禁止由下游侧空燃比传感器调节实际空燃比。
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4.发明授权
公开(公告)号：US4761950A
公开(公告)日：1988-08-09
申请号：US903977
申请日：1986-09-04
CPC分类号： F02D41/1441 , F02D41/2441 , F02D41/2454
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors. A center value of an air-fuel ratio correction amount or an air-fuel ratio feedback control parameter calculated based upon the output of the downstream-side air-fuel ratio sensor is calculated by a learning control, and an air-fuel ratio feedback control is initiated by using the center value when the engine enters into an air-fuel ratio feedback control state.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调整， 侧空燃比传感器。 通过学习控制来计算基于下游侧空燃比传感器的输出计算出的空燃比校正量或空燃比反馈控制参数的中心值，空燃比反馈控制 通过在发动机进入空燃比反馈控制状态时使用中心值来启动。
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公开(公告)号：US4739614A
公开(公告)日：1988-04-26
申请号：US831566
申请日：1986-02-21
申请人： Toshiyasu Katsuno , Nobuaki Kayanuma , Yasushi Sato , Toshio Tanahashi , Yoshiki Chujo , Toshinari Nagai , Kohichi Hasegawa , Hironori Bessho , Takatoshi Masui
发明人： Toshiyasu Katsuno , Nobuaki Kayanuma , Yasushi Sato , Toshio Tanahashi , Yoshiki Chujo , Toshinari Nagai , Kohichi Hasegawa , Hironori Bessho , Takatoshi Masui
CPC分类号： F02D41/1488 , F01N11/007 , F02D41/1441 , F01N2550/02 , F01N2900/0422 , F02D41/1456 , Y02T10/47
摘要： In a double air-fuel ratio sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust passage, the actual air-fuel ratio is adjusted in accordance with an air-fuel ratio correction amount calculated by using the output of the upstream-side air-fuel ratio sensor and an air-fuel ratio feedback control parameter such as delay time periods, skip amounts, or integration amounts calculated by using the output of the downstream-side air-fuel ratio sensor, and the calculation of the air-fuel ratio feedback control parameter is prohibited when the downstream-side air-fuel ratio sensor is in an abnormal state.
摘要翻译： 在设置在排气通路中的催化剂转化器的上游和下游的两个空燃比传感器系统的双重空燃比传感器系统中，根据通过使用计算出的空燃比校正量来调整实际空燃比 上游侧空燃比传感器的输出和利用下游侧空燃比传感器的输出计算的延迟时间段，跳过量或积分量等空燃比反馈控制参数，以及 当下游侧空燃比传感器处于异常状态时，禁止计算空燃比反馈控制参数。
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6.发明授权Double air-fuel ratio sensor system having improved exhaust emission characteristics 失效具有改善的废气排放特性的双重空燃比传感器系统
公开(公告)号：US4747265A
公开(公告)日：1988-05-31
申请号：US943797
申请日：1986-12-19
CPC分类号： F02D41/1495 , F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors. Also, when the output of the upstream-side air-fuel ratio sensor is in an abnormal state, an alarm is generated.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调整， 侧空燃比传感器。 此外，当上游侧空燃比传感器的输出处于异常状态时，产生报警。
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7.发明授权
公开(公告)号：US4745741A
公开(公告)日：1988-05-24
申请号：US847304
申请日：1986-04-02
申请人： Takatoshi Masui , Toshinari Nagai , Toshiyasu Katsuno , Yoshiki Chujo , Nobuaki Kayanuma , Hironori Bessho , Yasushi Sato , Toshio Tanahashi
发明人： Takatoshi Masui , Toshinari Nagai , Toshiyasu Katsuno , Yoshiki Chujo , Nobuaki Kayanuma , Hironori Bessho , Yasushi Sato , Toshio Tanahashi
IPC分类号： F02D41/14
CPC分类号： F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side air-fuel ratio sensor and the downstream-side air-fuel ratio sensor. The adjustment of the air-fuel ratio by the downstream-side air-fuel ratio sensor is stopped when the engine is in a predetermined state.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧空气燃料的输出 比传感器和下游侧空燃比传感器。 当发动机处于预定状态时，下游侧空燃比传感器的空燃比的调节停止。
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8.发明授权Double air-fuel ratio sensor system having improved exhaust emission characteristics 失效具有改善的废气排放特性的双重空燃比传感器系统
公开(公告)号：US4819427A
公开(公告)日：1989-04-11
申请号：US166049
申请日：1988-03-09
CPC分类号： F02D41/1495 , F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors. Also, when the output of the upstream-side air-fuel ratio sensor is in an abnormal state, an alarm is generated.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调整， 侧空燃比传感器。 此外，当上游侧空燃比传感器的输出处于异常状态时，产生报警。
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9.发明授权
公开(公告)号：US4729219A
公开(公告)日：1988-03-08
申请号：US846153
申请日：1986-03-31
申请人： Nobuaki Kayanuma , Toshinari Nagai , Takatoshi Masui , Yoshiki Chujo , Hironori Bessho , Yasushi Sato , Toshiyasu Katsuno , Toshio Tanahashi
发明人： Nobuaki Kayanuma , Toshinari Nagai , Takatoshi Masui , Yoshiki Chujo , Hironori Bessho , Yasushi Sato , Toshiyasu Katsuno , Toshio Tanahashi
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F02D41/1481
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, a delay operation is performed upon the output of the downstream-side air-fuel ratio sensor, so that the actual air-fuel ratio is adjusted in accordance with the output of the upstream-side air-fuel ratio sensor and the delayed output of the downstream-side air-fuel ratio sensor.
摘要翻译： 在设置在排气通路中的催化剂转换器的上游和下游的两个空燃比传感器系统中，对下游侧空燃比传感器的输出进行延迟动作， 根据上游侧空燃比传感器的输出和下游侧空燃比传感器的延迟输出来调节实际的空燃比。
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10.发明授权
公开(公告)号：US4723408A
公开(公告)日：1988-02-09
申请号：US904042
申请日：1986-09-04
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F02D41/2454
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors including an air-fuel ratio correction amount. Accordingly, only when the change of the intake air density is large, is a learning correction amount calculated so that a means value of the air-fuel ratio correction amount is brought close to a reference value. The actual air-fuel ratio is further adjusted in accordance with the learning correction amount.
摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调节， 包括空燃比校正量的侧面空燃比传感器。 因此，只有当进气密度的变化大时，才算出以使空燃比校正量的均值接近基准值的学习修正量。 根据学习校正量进一步调整实际的空燃比。
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