公开(公告)号：US4611562A

公开(公告)日：1986-09-16

申请号：US666470

申请日：1984-10-30

申请人： Jiro Nakano ,  Takao Ishibashi ,  Takao Akatsuka ,  Masao Kawaguchi

发明人： Jiro Nakano ,  Takao Ishibashi ,  Takao Akatsuka ,  Masao Kawaguchi

IPC分类号： F02D41/34 ,  F02D41/00 ,  F02D41/14 ,  G01N27/406 ,  G01N27/409 ,  F02M7/00 ,  G01N27/46

CPC分类号： F02D41/1494 ,  G01N27/4065 ,  G01N27/4067

摘要： An internal combustion engine has an exhaust system and an oxygen sensor fitted to the exhaust system including a sensor element and an electrically powered heater for heating the sensor element. A method is disclosed for controlling the power supplied to said heater by restricting it to be less than a predetermined value. This restriction may be done by controlling the value of a relatively steady current flowing through said heater, or alternatively may be done by supplying an intermittent voltage to said heater and by controlling the duty factor of said intermittent voltage. The power supplied to said heater may be determined by detecting the current flowing through said heater, or may be determined by detecting the voltage across said heater and the current flowing through said heater. Thereby, during engine heating up operation, the temperature of the heater element is raised as quickly as practicable, without any risk of over quick heating of the heater occurring, which might lead to damage thereto. Accordingly it is ensured that engine performance and the quality of exhaust gas emissions at the time of such engine warming up operation are good. A system is also described for implementing this method.

摘要翻译： 内燃机具有排气系统和安装在排气系统上的氧传感器，该排气系统包括用于加热传感器元件的传感器元件和电动加热器。 公开了一种通过将其限制为小于预定值来控制供应给所述加热器的功率的方法。 该限制可以通过控制流经所述加热器的相对稳定的电流的值来进行，或者可以通过向所述加热器提供间歇电压并且通过控制所述间歇电压的占空系数来完成。 提供给所述加热器的功率可以通过检测流过所述加热器的电流来确定，或者可以通过检测所述加热器两端的电压和流过所述加热器的电流来确定。 因此，在发动机加热运转时，加热器元件的温度尽可能快地上升，而不会发生加热器的过快加热的风险，这可能导致其损坏。 因此，能够确保在发动机升温运转时的发动机性能和排气质量良好。 还描述了用于实现该方法的系统。

公开(公告)号：US4561402A

公开(公告)日：1985-12-31

申请号：US670066

申请日：1984-11-09

申请人： Jiro Nakano ,  Takao Ishibashi ,  Takao Akatsuka ,  Mamoru Takata

发明人： Jiro Nakano ,  Takao Ishibashi ,  Takao Akatsuka ,  Mamoru Takata

IPC分类号： F02D41/34 ,  F02D41/00 ,  F02D41/14 ,  G01N27/409 ,  G01N27/26

CPC分类号： F02D41/1494

摘要： An internal combustion engine has an exhaust system and an oxygen sensor fitted to the exhaust system including a sensor element and an electrically powered heater for heating it. The power supplied to the heater is controlled by determining a target value for it according to operational parameters of the engine, and by controlling the mean power in a time interval as follows: the voltage applied to the heater and the current flowing through it are detected, an intermittent voltage is supplied to the heater, and the duty ratio of the intermittent voltage is controlled so that the product of the heater voltage and the heater current is substantially equal to the target power, with the detection of the voltage supplied to the heater synchronized with the energization of the heater. A system is also described for implementing this method.

摘要翻译： 内燃机具有排气系统和安装在排气系统上的氧传感器，该排气系统包括传感器元件和用于加热它的电动加热器。 通过根据发动机的运行参数确定其目标值，并通过如下控制在时间间隔内的平均功率来控制提供给加热器的功率：检测加到加热器上的电压和流过它的电流 将间歇电压提供给加热器，并且控制间歇电压的占空比，使得加热器电压和加热器电流的乘积基本上等于目标功率，同时检测提供给加热器的电压 与加热器通电同步。 还描述了用于实现该方法的系统。

公开(公告)号：US4485772A

公开(公告)日：1984-12-04

申请号：US388991

申请日：1982-06-16

申请人： Shigekatsu Uchida ,  Takao Akatsuka ,  Takahide Kawamura

发明人： Shigekatsu Uchida ,  Takao Akatsuka ,  Takahide Kawamura

IPC分类号： F02B77/08 ,  F02D17/00 ,  F02D17/04 ,  F02D29/02 ,  F02N11/08

CPC分类号： F02D17/04 ,  F02B77/08 ,  F02N11/0814 ,  F02D2041/228 ,  Y02T10/48

摘要： An engine is automatically stopped under predetermined conditions, thereafter, automatically restarted under other predetermined conditions, and a primary check indicating device for indicating abnormal conditions in various components of a vehicle is forcedly turned OFF at least when the engine is automatically stopped. The primary check indicating device includes, for example, a charge warning lamp for indicating abnormality in the generating condition, an oil pressure lamp for indicating abnormality in the pressure of lubricating oil and an exhaust gas temperature lamp for indicating abnormality in the temperature of exhaust gas.

摘要翻译： 发动机在预定条件下自动停止，此后在其他预定条件下自动重启，并且至少在发动机自动停止时，强制关闭指示车辆各部件中的异常状况的主检查指示装置。 主检查指示装置包括例如用于指示发电状态异常的充电警告灯，用于指示润滑油压力异常的油压灯和用于指示废气温度异常的排气温度灯 。

公开(公告)号：US4323440A

公开(公告)日：1982-04-06

申请号：US201237

申请日：1980-10-27

申请人： Takao Akatsuka

发明人： Takao Akatsuka

IPC分类号： G01N27/409 ,  G01N27/403 ,  G01N27/407 ,  G01N27/413 ,  G01N27/58

CPC分类号： G01N27/407 ,  G01N27/4077

摘要： An oxygen sensor for measuring the existence of oxygen in gases in an exhaust system or the like. An electrolytic body is formed as a tube with an open end and a closed end. An internal electrode is coated on the interior surface of the electrolytic body, and an external electrode is coated on the exterior surface of the electrolytic body. The external electrode is exposed to the gases. A tubular housing is airtightly connected around the outer circumference of the open end of the tubular electrolytic body, thus defining within it an internal space to which the internal electrode is exposed. An electrically conducting tube, coaxial with the tubular housing, is electrically connected to the internal electrode by its end closest thereto. Atmospheric air can only pass into the space within the tubular housing through a side hole in the housing which opposes a side hole in the electrically conducting tube. Between these holes there is located a blocking member which includes a tube formed of an elastomeric material formed with a side hole with corresponds to the other side holes, and a tube formed of a water repellent porous material, the part of which opposes the side holes, and which is not formed with any holes, so that it acts as a filter. One of these tubes is fitted inside the other. A lead wire connects to the other end of the electrically conducting tube and leads out from the sensor to convey electrical output signals therefrom. A protective shield is mounted over the outside of the side hole in the housing, and does not interrupt communication between this hole and the atmosphere, while it shields this hole from direct exposure to the exterior.

摘要翻译： 用于测量排气系统等中的气体中氧的存在的氧传感器。 电解体形成为具有开口端和封闭端的管。 内电极被涂覆在电解体的内表面上，外电极被涂覆在电解体的外表面上。 外部电极暴露于气体。 管状壳体围绕管状电解体的开口端的外周气密连接，从而在其内限定内部电极露出的内部空间。 与管状壳体同轴的导电管通过其最靠近其端部与内部电极电连接。 大气中的空气只能通过壳体中与导电管中的侧孔相对的侧孔进入管状壳体内的空间。 在这些孔之间设有阻挡构件，该阻挡构件包括由弹性体材料形成的管，该弹性材料形成有具有对应于其它侧孔的侧孔，以及由防水多孔材料形成的管，其一部分与侧孔相对 ，并且不形成任何孔，从而其用作过滤器。 其中一根管装在另一根管内。 导线连接到导电管的另一端并从传感器引出，以从其传送电输出信号。 保护罩安装在外壳侧孔外侧，并且不会中断该孔与大气之间的连通，同时屏蔽该孔直接暴露于外部。