公开(公告)号：US4142482A

公开(公告)日：1979-03-06

申请号：US767133

申请日：1977-02-09

申请人： Masaharu Asano ,  Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Nobuzi Manaka ,  Mituhiko Ezoe

发明人： Masaharu Asano ,  Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Nobuzi Manaka ,  Mituhiko Ezoe

IPC分类号： F02D41/14 ,  F02B3/08 ,  F01N3/08 ,  F02M7/12

CPC分类号： F02D41/1479 ,  F02D41/1456

摘要： Emission control apparatus for internal combustion engines is provided with a sensor for detecting the concentration of a particular exhaust composition in the emissions from the engine. A signal indicating the deviation of the mixture ratio from a controlled point is generated by comparing the output from the sensor with a reference level, the signal being modified in amplitude according to a predetermined control characteristic and used to regulate the air-fuel mixture ratio at the desired control point. The varying magnitude of the sensed concentration is smoothed into a signal of slowly varying magnitude which is used to control the reference level so that error introduced into the deviation indicating signal due to the change with time in the output performance of the exhaust composition sensor is self-compensated. A level sensor is provided to detect when the reference level reaches an end of the control range to change the operating mode of the engine from closed-loop to open-loop mode.

摘要翻译： 用于内燃机的排放控制装置设置有用于检测来自发动机的排放物中的特定排气组合物的浓度的传感器。 通过将传感器的输出与基准电平进行比较，产生混合比与受控点的偏差的信号，该信号根据预定的控制特性在幅度上进行改变，并用于调节空气 - 燃料混合比在 所需的控制点。 感测浓度的变化幅度被平滑化成缓慢变化幅度的信号，其用于控制​​参考电平，使得由于排气组成传感器的输出性能随时间变化而引入到偏差指示信号中的误差是自身的 补偿。 提供了一个液位传感器来检测参考电平何时达到控制范围的结束，以将发动机的运行模式从闭环模式转换到开环模式。

公开(公告)号：US4131089A

公开(公告)日：1978-12-26

申请号：US767134

申请日：1977-02-09

申请人： Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Masaharu Asano ,  Nobuzi Manaka ,  Mituhiko Ezoe

发明人： Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Masaharu Asano ,  Nobuzi Manaka ,  Mituhiko Ezoe

IPC分类号： F02D41/14 ,  F02B3/08 ,  F01N3/08 ,  F02M7/12

CPC分类号： F02D41/1479

摘要： A reference voltage, which is compared with an output voltage of an exhaust gas sensor in a differential signal generator of an electronic closed loop air-fuel ratio control system, changes depending upon a mean value of an output of the exhaust gas sensor provided in an exhaust pipe extending from an internal combustion engine. Furthermore, the magnitude of the reference voltage is limited in such a manner as to be within a predetermined range, or in other words, the magnitude of the reference voltage is limited at at least one of an upper and a lower values thereof.

摘要翻译： 与电子闭环空燃比控制系统的差分信号发生器中的废气传感器的输出电压进行比较的参考电压根据设置在电子闭环空燃比控制系统中的排气传感器的输出的平均值而变化 从内燃机延伸的排气管。 此外，参考电压的大小以限制在预定范围内的方式被限制，或者换句话说，参考电压的大小被限制在其上限值和下限值中的至少一个。

公开(公告)号：US4215656A

公开(公告)日：1980-08-05

申请号：US767988

申请日：1977-02-11

申请人： Nobuzi Manaka ,  Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Masaharu Asano ,  Mituhiko Ezoe

发明人： Nobuzi Manaka ,  Takeshi Fujishiro ,  Shigeo Aono ,  Akio Hosaka ,  Masaharu Asano ,  Mituhiko Ezoe

IPC分类号： F02D41/14 ,  F02B3/08 ,  F02M7/12

CPC分类号： F02D41/1479

摘要： A circuit is provided in an electronic closed loop air-fuel ratio control system for starting and terminating the operation of the system at different voltages from an exhaust gas sensor.

摘要翻译： 电路设置在电子闭环空燃比控制系统中，用于在与废气传感器不同的电压下启动和终止系统的操作。