公开(公告)号：US4763265A

公开(公告)日：1988-08-09

申请号：US826467

申请日：1986-02-05

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Yasunari Seki ,  Takanori Shiina ,  Minoru Muroya

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Yasunari Seki ,  Takanori Shiina ,  Minoru Muroya

IPC分类号： F02D31/00 ,  F02D41/30 ,  F02B3/00

CPC分类号： F02D41/3005 ,  F02D31/005 ,  F02D2011/102 ,  F02D2041/2027 ,  F02D2200/0406

摘要： An air intake side secondary air supply system for an internal combustion engine having an air intake side secondary air supply system includes an oxygen concentration sensor, and controls a duty ratio of opening and closing of an open/close valve disposed in the air intake side secondary air supply passage by determining a valve open period within each duty cycle of control operation in accordance with a result of comparison between the level of the output signal of the oxygen concentration sensor and a level corresponding to a target air-fuel ratio. The duty ratio of opening and closing of the open/close valve is maintained within a predetermined duty ratio range so as to improve effectiveness of the control of the secondary air supply as well as to avoid the generation of over lean or over rich mixture.

摘要翻译： 具有进气侧二次空气供给系统的内燃机的进气侧二次空气供给系统具有氧浓度传感器，并且控制配置在吸气侧二次侧的开闭阀的开闭的占空比 通过根据氧浓度传感器的输出信号的电平与目标空燃比的电平之间的比较的结果来确定控制操作的每个占空比内的阀打开时段的空气供给通道。 打开/关闭阀的打开和关闭的占空比保持在预定的占空比范围内，以提高二次空气供应的控制的有效性，并避免产生过度的或超过浓的混合物。

公开(公告)号：US4870586A

公开(公告)日：1989-09-26

申请号：US202862

申请日：1988-06-06

申请人： Masahiko Asakura ,  Takanori Shiina ,  Masahiro Ueda ,  Shinichi Kubota ,  Tomohiko Kawanabe ,  Noritaka Kushida ,  Minoru Muroya

发明人： Masahiko Asakura ,  Takanori Shiina ,  Masahiro Ueda ,  Shinichi Kubota ,  Tomohiko Kawanabe ,  Noritaka Kushida ,  Minoru Muroya

IPC分类号： F02D35/00 ,  F02D41/14

CPC分类号： F02D35/003 ,  F02D41/1475 ,  F02D41/1456

摘要： An air-fuel ratio control system for an internal combustion engine mounted on a vehicle with a transmission, including an oxygen concentration sensor producing an output signal whose level is substantially proportional to an oxygen concentration of the exhaust gas, effects a feedback control of the air-fuel ratio of mixture to be supplied to the engine toward a target value determined on the basis of various parameters of the engine operation and corrected in response to a magnitude of atmospheric pressure, so that the higher a shift position of the transmission gear is, the leaner the target air-fuel ratio becomes. Thus, the fuel consumption in a light load operating condition of the engine is decreased and the driveability of the vehicle is improved.

摘要翻译： 一种用于安装在具有变速器的车辆上的内燃机的空燃比控制系统，包括氧浓度传感器，其产生与废气的氧浓度基本成比例的输出信号，其实现空气的反馈控制 - 将要向发动机提供的混合物的燃料比达到基于发动机运转的各种参数确定的目标值并且响应于大气压力的大小而被校正，使得变速齿轮的换档位置越高， 目标空燃比变得越来越细。 因此，发动机的轻负载运转状态下的燃料消耗减少，车辆的驾驶性提高。

公开(公告)号：US4705012A

公开(公告)日：1987-11-10

申请号：US807716

申请日：1985-12-11

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Takanori Shiina ,  Minoru Muroya

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Takanori Shiina ,  Minoru Muroya

IPC分类号： F02D35/00 ,  F02D41/14 ,  F02M23/04

CPC分类号： F02D35/003 ,  F02D41/1488 ,  F02D41/1456

摘要： An air intake side secondary air supply system for an internal combustion engine has an air intake system using a carburetor and an air intake side secondary air supply passage leading downstream of the carburetor. The passage includes an oxygen concentration sensor producing an output signal whose level is substantially proportional to an oxygen concentration of the exhaust gas. A control means for controlling a flow control valve is disposed in the air intake side secondary air supply passage and operates in accordance to the output signal of the oxygen concentration sensor. In a variation of the invention, the feedback control of air-fuel ratio using the output signal of the oxygen concentration sensor is effected only when the engine operational state is in a predetermined operational region.

摘要翻译： 用于内燃机的进气侧二次空气供应系统具有使用化油器的进气系统和引导在化油器下游的进气侧二次空气供给通道。 通道包括产生输出信号的氧浓度传感器，其输出信号的电平基本上与废气的氧浓度成比例。 用于控制流量控制阀的控制装置设置在进气侧二次空气供给通道中，并且根据氧浓度传感器的输出信号进行操作。 在本发明的变型中，仅当发动机工作状态处于预定操作区域时，才使用氧浓度传感器的输出信号进行空燃比的反馈控制。

公开(公告)号：US4721084A

公开(公告)日：1988-01-26

申请号：US908854

申请日：1986-09-18

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Minoru Muroya ,  Katsuhiko Kimura ,  Noritaka Kushida ,  Hiroshi Hasebe

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Minoru Muroya ,  Katsuhiko Kimura ,  Noritaka Kushida ,  Hiroshi Hasebe

IPC分类号： B01D53/86 ,  F01N9/00 ,  F02D41/14 ,  G01N27/406 ,  G01N27/417 ,  F02D5/00

CPC分类号： G01N27/417 ,  F02D41/1476 ,  F02D41/1494

摘要： Method for controlling an oxygen concentration sensor for sensing an oxygen concentration in an exhaust gas of an internal combustion engine, which sensor includes an oxygen pump element and a heater element, comprises steps for controlling a pump current and a heat current control in response to a result of a detection of engine load. When the engine is operating in a predetermined high load range, the supply of the pump current to the oxygen pump element is stopped, and the heat current to the heater element is reduced when the engine operation in the high load range has continued for more than a predetermined time period. The heater current to the heater element is stopped when the engine load is in a first predetermined load range, and when the engine operation in a second load range which is lighter than the first load range has continued for a predetermined time period.

摘要翻译： 用于控制用于感测内燃机的排气中的氧浓度的氧浓度传感器的方法，所述内燃机的传感器包括氧气泵元件和加热器元件，包括用于响应于一个或多个泵的电流控制泵电流和热电流控制的步骤 检测发动机负荷的结果。 当发动机在预定的高负载范围内运行时，停止向氧气泵元件供应泵电流，并且当高负载范围内的发动机运转持续超过 预定时间段。 当发动机负载处于第一预定负载范围时，并且当在比第一负载范围更轻的第二负载范围内的发动机运转持续预定时间段时，停止加热器元件的加热器电流。

公开(公告)号：US4665874A

公开(公告)日：1987-05-19

申请号：US909535

申请日：1986-09-22

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Minoru Muroya ,  Katsuhiko Kimura ,  Noritaka Kushida ,  Hiroshi Hasebe

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Minoru Muroya ,  Katsuhiko Kimura ,  Noritaka Kushida ,  Hiroshi Hasebe

IPC分类号： F02D41/14 ,  G01N27/406 ,  G01N27/407 ,  G01N27/417 ,  F02B3/00

CPC分类号： G01N27/407 ,  G01N27/4065 ,  G01N27/417

摘要： An oxygen concentration sensing device and an air/fuel ratio control system for an internal combustion engine which include a pair of solid electrolyte members having oxygen ion permeability which are arranged to face each other to form a restricted region between them. One of the solid electrolyte members is operative as an oxygen pump element when a pump current is supplied across the electrodes thereof. The sensing device is provided with a current supply part including a limit command circuit which generates a current stop command signal when the magnitude of the pump current exceeds a reference limit level. With the current stop command signal, the supply of the pump current is stopped so as to prevent an overcurrent to the oxygen pump element. The air/fuel ratio control system includes an air/fuel ratio detection part and an air/fuel ratio control part operated by an air/fuel ratio detection signal. The detection of the air/fuel ratio and the supply of the pump current are stopped under a predetermined operating condition of the engine.

摘要翻译： 一种用于内燃机的氧浓度检测装置和空/燃比控制系统，包括一对具有氧离子渗透性的固体电解质构件，它们彼此相对地设置以在它们之间形成限制区域。 当泵电流跨过其电极供应时，固体电解质构件中的一个作为氧气泵元件起作用。 感测装置设置有电流供应部分，其包括限制命令电路，当泵电流的大小超过参考极限电平时，产生电流停止命令信号。 利用当前的停止命令信号，停止泵电流的供给，以防止对氧气泵元件的过电流。 空气/燃料比控制系统包括由空/燃比检测信号操作的空/燃比检测部和空/燃比控制部。 在发动机的预定操作条件下停止空燃比的检测和泵电流的供给。

公开(公告)号：US4690121A

公开(公告)日：1987-09-01

申请号：US818630

申请日：1986-01-14

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Takanori Shiina ,  Yukihiro Matsumoto ,  Minoru Muroya

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Takanori Shiina ,  Yukihiro Matsumoto ,  Minoru Muroya

IPC分类号： F02D35/00 ,  F02M23/06 ,  F02M23/08 ,  F02M23/10

CPC分类号： F02D35/003

摘要： An air intake side secondary air supply system for an internal combustion engine having an air intake side secondary air supply passage and an O.sub.2 sensor controls a duty ratio of opening and closing of an open/close valve disposed in the air intake side secondary air supply passage in accordance with a detected air-fuel ratio of mixture by means of an output signal of the O.sub.2 sensor. The system sets a base valve open period of the open/close valve every predetermined period and decreases the base valve open period by a first predetermined correction amount when the detected air-fuel ratio is leaner than a target air-fuel ratio, and increases the base valve open period by a second predetermined correction amount when the detected air-fuel ratio is richer than the target air-fuel ratio.

摘要翻译： 具有进气侧二次空气供给通路和O2传感器的内燃机的进气侧二次空气供给系统控制配置在吸气侧二次空气供给通路内的开闭阀的开闭的占空比 根据O 2传感器的输出信号，根据检测出的混合气的比例。 该系统每隔规定时间设定开闭阀的基阀打开期间，当检测出的空燃比比目标空燃比稀的时，将基阀开启期间缩短第一规定的修正量， 当检测到的空燃比比目标空燃比更浓时，基阀开启期间达到第二预定修正量。

公开(公告)号：US4818362A

公开(公告)日：1989-04-04

申请号：US27893

申请日：1987-03-19

申请人： Masahiko Asakura ,  Tomohiko Kawanabe ,  Minoru Muroya ,  Shin'ichi Kubota ,  Katsuhiko Kimura ,  Yasunari Seki ,  Kouji Matsuura

发明人： Masahiko Asakura ,  Tomohiko Kawanabe ,  Minoru Muroya ,  Shin'ichi Kubota ,  Katsuhiko Kimura ,  Yasunari Seki ,  Kouji Matsuura

IPC分类号： G01N27/406 ,  G01N27/58

CPC分类号： G01N27/4065

摘要： An apparatus for sensing the concentration of oxygen in a gas such as engine exhaust gas includes an oxygen concentration sensor formed of an oxygen pump element and a sensor cell element, each based on a solid electrolytic member formed of a material such as ZrO.sub.2, and is provided with a limiter circuit which functions to reduce the level of current supplied to the oxygen pump element when a voltage produced by the sensor cell element indicates that this current level is such as to produce a "blackening" phenomenon whereby deterioration of the oxygen pump element will occur and oxygen concentration sensing reliability will be lowered. The apparatus also includes a delay circuit which functions such that a reduction of the oxygen pump element current level is delayed by a predetermined time interval, after an increase of the sensor cell element voltage to the "blanking" region is detected, thereby preventing fluctuations in the oxygen pump element current level due to transient increases in sensor cell element voltage and increasing the sensing reliability.

摘要翻译： 用于检测诸如发动机废气的气体中的氧浓度的装置包括由氧泵元件和传感器电池元件形成的氧浓度传感器，每个氧浓度传感器基于由诸如ZrO 2的材料形成的固体电解部件，并且是 设置有限制电路，其功能是当由传感器电池元件产生的电压指示该电流水平产生“变黑”现象时，降低供应给氧泵元件的电流电平，从而使氧泵元件的劣化 会发生氧浓度检测的可靠性降低。 该装置还包括延迟电路，其功能是使得在检测到“消隐”区域的传感器单元元件电压增加之后，将氧气泵元件电流水平的减小延迟预定时间间隔，从而防止波动 氧泵元件电流水平由于传感器单元电压的瞬态增加而增加了传感器的可靠性。

公开(公告)号：US4804454A

公开(公告)日：1989-02-14

申请号：US28138

申请日：1987-03-19

申请人： Masahiko Asakura ,  Yasunari Seki ,  Takanori Shiina ,  Minoru Muroya

发明人： Masahiko Asakura ,  Yasunari Seki ,  Takanori Shiina ,  Minoru Muroya

IPC分类号： G01N27/419 ,  G01N27/27 ,  G01N27/406 ,  G01N27/409 ,  G01N27/413 ,  G01N27/417 ,  G01N27/58

CPC分类号： G01N27/417 ,  G01N27/4065

摘要： An oxygen concentration sensing apparatus includes an oxygen pump element and a sensor cell element to be placed in a gas under measurement, and a device for generating a voltage value command indicating a voltage to be generated across electrodes of the sensor cell element. A current limit device is provided so that the supply of the voltage value command is stopped to decrease a pump current to the oxygen pump element gradually when the voltage generated across the electrodes of the sensor cell element exceeds a first predetermined voltage, and the pump current to the oxygen pump element is reduced immediately when the voltage generated across the electrodes of the sensor cell element exceeds a second predetermined voltage which is higher than the first predetermined voltage.

摘要翻译： 氧浓度检测装置包括氧气泵元件和放置在测量气体中的传感器电池元件，以及用于产生表示在传感器电池元件的电极之间产生的电压的电压值指令的装置。 提供电流限制装置，使得当传感器电池元件两端产生的电压超过第一预定电压时，电压值指令的供给被停止以逐渐减小到氧气泵元件的泵浦电流，并且泵电流 当在传感器单元元件的电极两端产生的电压超过比第一预定电压高的第二预定电压时，氧气泵元件立即被减小。

公开(公告)号：US4732127A

公开(公告)日：1988-03-22

申请号：US905434

申请日：1986-09-10

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Katsuhiko Kimura ,  Minoru Muroya

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Katsuhiko Kimura ,  Minoru Muroya

IPC分类号： F02B3/00 ,  F02D41/00 ,  F02D41/14 ,  G01N27/406 ,  G01N27/417

CPC分类号： G01N27/417 ,  F02D41/1476 ,  G01N27/4065 ,  F02D41/1456

摘要： An air/fuel ratio control system for an internal combustion engine having an air supply system for controlling the air/fuel ratio of mixture to be supplied to the engine, and an oxygen concentration sensing device for sensing the oxygen concentration in the exhaust gas of the internal combustion engine. The oxygen concentration sensing device includes a pair of solid electrolyte members operating as an oxygen pump element to which a pump current is supplied, and a sensor cell element. An open/close valve is provided in the air supply system and controlled by a duty ratio control circuit which causes the open/close valve to be opened for a calculated valve open time period in each of successive predetermined cycles in response to a result of detection of air/fuel ratio. When the calculated valve open time period exceeds a predetermined upper limit, the supply of the pump current is stopped so that the blackening phenomenon of the solid electrolyte members is avoided.

摘要翻译： 一种用于内燃机的空气/燃料比控制系统，具有用于控制供给发动机的混合物的空气/燃料比的空气供给系统，以及用于检测发动机的排气中的氧气浓度的氧浓度检测装置 内燃机。 氧浓度检测装置包括作为供给泵电流的氧气泵元件而工作的一对固体电解质部件和传感器电池元件。 在供气系统中设置一个开/关阀，并由占空比控制电路控制，该占空比控制回路响应于检测结果，在连续的每个预定循环中使打开/关闭阀打开计算的阀打开时间段 的空气/燃料比。 当所计算的阀打开时间段超过预定上限时，停止泵电流的供给，从而避免固体电解质部件的变黑现象。