公开(公告)号：US4494374A

公开(公告)日：1985-01-22

申请号：US461475

申请日：1983-01-27

申请人： Tsuyoshi Kitahara ,  Kohki Sone ,  Masaaki Uchida

发明人： Tsuyoshi Kitahara ,  Kohki Sone ,  Masaaki Uchida

IPC分类号： F02D35/00 ,  F02D41/14 ,  G01N27/406 ,  G01N27/407 ,  G01N27/416 ,  F01N3/20

CPC分类号： G01N27/4071 ,  F02D41/1476 ,  F02D41/1479 ,  G01N27/4065 ,  Y02T10/22

摘要： An air/fuel ratio monitoring system in an IC engine, using an oxygen sensor of the concentration cell type which has a laminate comprising an inner electrode layer, a microscopically porous layer of oxygen ion conductive solid electrolyte and an outer electrode layer exposable to exhaust gas and which exhibits a sharp change in output voltage level in response to a change in the air/fuel ratio in the engine across a stoichiometric ratio. To ensure accurate monitoring of the air/fuel ratio even when the engine is operated under conditions which cause a large rise or fall in an average level of the output of the oxygen sensor, the monitoring system has a signal treatment means for producing a variable reference voltage, with which the sensor output is compared, by first adding a definite voltage to or subtracting a definite voltage from the output of the oxygen sensor depending on the result of comparison between the sensor output and the reference voltage and then smoothing the voltage resulting from the addition or subtraction of the definite voltage.

摘要翻译： IC发动机中的空气/燃料比监测系统，使用具有包含内电极层，氧离子导电固体电解质的微孔多孔层和可暴露于排气的外电极层的层叠体的浓缩电池型氧传感器 并且其响应于发动机中的空气/燃料比在化学计量比上的变化而表现出输出电压水平的急剧变化。 为了确保即使当发动机在氧传感器的输出的平均输出量的上升或下降的情况下运行的情况下也能准确地监视空气/燃料比，则监视系统具有用于产生可变参考的信号处理装置 电压，通过与传感器输出与参考电压之间的比较结果，先从氧传感器的输出中加一定电压或减去一定电压，然后平滑电压 确定电压的加或减。

公开(公告)号：US4440621A

公开(公告)日：1984-04-03

申请号：US446315

申请日：1982-12-02

申请人： Tsuyoshi Kitahara ,  Masaaki Uchida ,  Kohki Sone

发明人： Tsuyoshi Kitahara ,  Masaaki Uchida ,  Kohki Sone

IPC分类号： F02D35/00 ,  F02D41/14 ,  G01F5/00 ,  G01N27/406 ,  G01N27/407 ,  G01N27/413 ,  G01N27/58

CPC分类号： G01N27/4071 ,  F02D41/1476 ,  F02D41/1479 ,  G01N27/4065

摘要： An air/fuel ratio detection system for an IC engine, using an oxygen sensor element of the concentration cell type which has a laminate of a measurement electrode layer exposed to the exhaust gas, a porous layer of oxygen ion conductive solid electrolyte and a reference electrode layer and requires the supply of a small DC current thereto to produce a reference oxygen partial pressure at the reference electrode by a balance between migration of oxygen ions to the reference electrode and diffusion of oxygen molecules therefrom. To prevent excessive rise in the reference oxygen partial pressure even when the engine continues to discharge exhaust gas high in the content of oxygen, the detection system has a control circuit which controls the intensity and flow direction of the current for the sensor element with reference to a voltage which is produced by adding a definite voltage to, or subtracting the definite voltage from, the sensor output voltage depending on the level of oxygen content in the exhaust gas indicated by the sensor output voltage and smoothing the voltage resulting from the addition or subtraction.

摘要翻译： 一种用于IC发动机的空气/燃料比检测系统，使用具有暴露于废气的测量电极层的层压体，浓度单元型的氧传感器元件，氧离子导电固体电解质的多孔层和参比电极 并且需要向其供应小直流电流以通过氧离子迁移到参比电极之间的平衡和氧分子的扩散来平衡参考电极处的参考氧分压。 为了防止参考氧分压的过度上升，即使当发动机继续排出氧含量高的废气时，检测系统具有控制电路，其控制传感器元件的电流的强度和流向，参考 通过根据由传感器输出电压指示的排气中的氧含量的水平，从传感器输出电压中增加一定电压或减去确定的电压而产生的电压，并平滑由加法或减法产生的电压 。

公开(公告)号：US4507986A

公开(公告)日：1985-04-02

申请号：US351266

申请日：1982-02-22

申请人： Kenji Okamura ,  Hatsuo Nagaishi ,  Tsuyoshi Kitahara ,  Kohki Sone ,  Koyo Nakamura

发明人： Kenji Okamura ,  Hatsuo Nagaishi ,  Tsuyoshi Kitahara ,  Kohki Sone ,  Koyo Nakamura

IPC分类号： F02D29/00 ,  B60W10/06 ,  F02D31/00 ,  F02D35/00 ,  F02P5/15 ,  F16H61/02 ,  F16H61/21 ,  F16H61/66 ,  F16H63/06 ,  F16H63/40 ,  B60K41/18 ,  B60K41/12

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/101 ,  B60W10/18 ,  B60W30/1819 ,  B60W30/1882 ,  F02D31/002 ,  F02D35/00 ,  F02P5/1502 ,  F16H61/66 ,  B60W2710/0622 ,  B60W2710/0644 ,  Y02T10/46 ,  Y10T477/623 ,  Y10T477/62427

摘要： A control system for a motor vehicle is disclosed wherein the parameters for optimum operation for an engine are determined based upon an acceleration position and a vehicle speed, and a continuously variable transmission is operated to vary a drive ratio in such a manner as to cause the engine to operate according to those parameters.

摘要翻译： 公开了一种用于机动车辆的控制系统，其中基于加速位置和车速确定用于发动机的最佳操作的参数，并且操作无级变速器以改变驱动比，从而使得 发动机根据这些参数进行操作。

公开(公告)号：US4601273A

公开(公告)日：1986-07-22

申请号：US655225

申请日：1984-09-27

申请人： Tsuyoshi Kitahara ,  Kohki Sone

发明人： Tsuyoshi Kitahara ,  Kohki Sone

IPC分类号： G01N27/26 ,  F02D41/00 ,  F02D41/14 ,  G01N27/409 ,  F01N3/20

CPC分类号： F02D41/1479 ,  F02D41/1476

摘要： An air/fuel ratio monitoring system in an IC engine, using an oxygen sensor of the concentration cell type which has an inner electrode layer, a microscopically porous layer of oxygen ion conductive solid electrolyte, and an outer electrode layer to be exposed to the exhaust gas and exhibits a sharp change in the level of output voltage in response to a change in the air/fuel ratio in the engine across the stoichiometric ratio. To ensure accurate monitoring of the air/fuel ratio even though an average level of the sensor output changes for various reasons such as aging of the sensor, the monitoring system produces a variable reference voltage. The output of the oxygen sensor is compared with this reference voltage by first adding or subtracting a fixed voltage to the output voltage of the sensor, depending on the result of comparison between the sensor output. The resultant reference voltage and voltage is then smoothed in an RC circuit. To prevent misjudgement of the air/fuel ratio by unintentional intersection of the sensor output voltage attenuating after responding to a change in the air/fuel ratio across the stoichiometric ratio and the reference voltage, the system includes a control means for varying the time constant at the voltage-smoothing operation according to the manner of a change in the sensor output voltage.

摘要翻译： 使用具有内部电极层的浓度单元型的氧传感器，氧离子传导性固体电解质的显微多孔层和暴露于排气的外部电极层的IC发动机中的空气/燃料比监视系统 气体并且响应于发动机中的空气/燃料比在化学计量比上的变化而显示出输出电压水平的急剧变化。 即使传感器输出的平均水平由于传感器老化等各种原因而变化，为了确保空/燃比的准确监视，监控系统产生可变参考电压。 根据传感器输出的比较结果，将氧传感器的输出与该参考电压进行比较，首先对传感器的输出电压加上或减去固定电压。 然后在RC电路中平滑所得的参考电压和电压。 为了防止在响应于化学计量比与参考电压之间的空气/燃料比的变化之后衰减的传感器输出电压的非故意的相交，防止空气/燃料比的错误判断，该系统包括用于改变时间常数的控制装置 根据传感器输出电压变化的方式进行电压平滑运算。

公开(公告)号：US4471648A

公开(公告)日：1984-09-18

申请号：US386356

申请日：1982-06-08

申请人： Masaaki Uchida ,  Shigeo Isitani ,  Kohki Sone

发明人： Masaaki Uchida ,  Shigeo Isitani ,  Kohki Sone

IPC分类号： G01N27/12 ,  G01N27/409 ,  G05D23/24 ,  G01N27/26

CPC分类号： G01N27/12 ,  G05D23/2401

摘要： A temperature control system is disclosed wherein a heater of a gas sensor and a plurality of reference resistors cooperate to form a bridge circuit. The temperature control system comprises a comparator means for monitoring a balancing voltage of the bridge circuit and generating a control signal indicative of the balancing voltage and an electric power amplifier means responsive to the control signal for varying a voltage applied to the bridge circuit in such a manner to reduce the balancing voltage. The gas sensor has mounted therein at least one of the plurality of reference resistors, which reference resistor having a resistance resulting from multiplying the resistance of the heater with a constant.

摘要翻译： 公开了一种温度控制系统，其中气体传感器和多个参考电阻器的加热器协作以形成桥接电路。 温度控制系统包括比较器装置，用于监测桥接电路的平衡电压并产生指示平衡电压的控制信号;以及电功率放大器装置，响应控制信号改变施加在这种电路中的桥接电路的电压 降低平衡电压的方式。 气体传感器在其中安装有多个参考电阻器中的至少一个参考电阻器，其参考电阻器具有由加热器的电阻乘以常数而产生的电阻。

公开(公告)号：US4365604A

公开(公告)日：1982-12-28

申请号：US231234

申请日：1981-02-04

申请人： Kohki Sone

发明人： Kohki Sone

IPC分类号： F02D41/14 ,  G01N27/409 ,  G01N27/04 ,  F02B3/00 ,  F02B3/08 ,  G01N27/58

CPC分类号： F02D41/1476

摘要： A system for feedback control of air/fuel ratio in an IC engine, utilizing an oxygen-sensitive device which is provided with a heater and disposed in exhaust gas to provide a feedback signal. This device has a porous solid electrolyte layer with a measurement electrode layer on the outside and a reference electrode layer on the inside facing a substrate. The control system includes a sub-system to apply a voltage to the heater and force a DC current to flow through the solid electrolyte layer to cause migration of oxygen ions therethrough to thereby establish a reference oxygen partial pressure on the inner side of the solid electrolyte layer. To prevent great changes in the reference oxygen partial pressure by the influence of the exhaust gas temperature, the sub-system comprises sensors to detect the engine operating condition and control means for gradually varying both said voltage and said current according as the detected operating condition varies. For example, the voltage and current may be varied each by using a combination of a variable resistor and a stepping motor or a combination of fixed resistances and electrically controllable switches connected respectively in parallel with the resistances.

摘要翻译： 一种用于IC引擎中的空气/燃料比的反馈控制的系统，利用设置有加热器并设置在排气中以提供反馈信号的氧敏装置。 该装置具有在外部具有测量电极层的多孔固体电解质层和在衬底上的参考电极层。 控制系统包括用于向加热器施加电压并迫使直流电流流过固体电解质层的子系统以使氧离子通过其迁移，从而在固体电解质的内侧上建立参考氧分压 层。 为了通过排气温度的影响来防止参考氧分压的巨大变化，子系统包括用于检测发动机工作状况的传感器和根据检测到的操作条件变化而逐渐改变所述电压和所述电流的控制装置 。 例如，电压和电流可以通过使用可变电阻器和步进电机的组合或者分别与电阻并联连接的固定电阻和电可控开关的组合来改变。

公开(公告)号：US4359989A

公开(公告)日：1982-11-23

申请号：US161405

申请日：1980-06-20

申请人： Kenji Masaki ,  Kohki Sone ,  Sadao Takase

发明人： Kenji Masaki ,  Kohki Sone ,  Sadao Takase

IPC分类号： F02B1/04 ,  F02D3/02 ,  F02D33/00 ,  F02D35/00 ,  F02D41/14 ,  F02M7/00 ,  F02M7/24 ,  F02P5/15 ,  G01N27/406 ,  G01N27/417 ,  G05D11/13

CPC分类号： G01N27/417 ,  F02D41/144 ,  F02D41/1476 ,  G01N27/4065 ,  F02B1/04

摘要： A feedback control system using an oxygen-sensitive air/fuel ratio sensor which is disposed in induction passage for an IC engine downstream of a fuel supply device with the provision of an ignition means to burn a fractional portion of an air-fuel mixture in the induction passage such that the oxygen-sensitive sensor is exposed to a resultant combustion gas. The sensor is of the concentration cell type having a layer of solid electrolyte such as zirconia provided with two electrode layers, and constant DC current is supplied to this sensor to cause migration of oxygen ions through the solid electrolyte layer, whereby this sensor exhibits a slope output characteristic and can detect air/fuel ratios either above or below a stoichiometric ratio or exhibits an on-off characteristic and can detect the stoichiometric ratio depending on the intensity and flow direction of the current. Owing to reduced overall length of the closed-loop, this control system can accomplish correction of a deviated mixing ratio in a shortened period of time.

摘要翻译： 一种使用氧敏感空气/燃料比传感器的反馈控制系统，其设置在用于燃料供应装置下游的IC发动机的进气通道中，其具有点燃装置，以在燃料供给装置中燃烧空气 - 燃料混合物的一部分 感应通道使得氧敏感传感器暴露于所得到的燃烧气体。 传感器是具有固体电解质层的浓度电池类型，例如设置有两个电极层的氧化锆，并且向该传感器提供恒定的直流电流以使氧离子迁移通过固体电解质层，由此该传感器呈现斜率 输出特性，可以检测高于或低于化学计量比的空气/燃料比，或表现出开关特性，并且可以根据电流的强度和流向检测化学计量比。 由于闭环的总长度减小，该控制系统可以在缩短的时间内完成偏差混合比的校正。

公开(公告)号：US4430191A

公开(公告)日：1984-02-07

申请号：US389380

申请日：1982-06-17

申请人： Kohki Sone ,  Thuyoshi Kitahara

发明人： Kohki Sone ,  Thuyoshi Kitahara

IPC分类号： F02D41/12 ,  F02D41/14 ,  G01N27/46

CPC分类号： F02D41/1494

摘要： An air/fuel ratio control system including an oxygen sensor disposed in the exhaust gas to provide a feedback signal. The oxygen sensor is of the solid electrolyte concentration cell type having a heater and is operated with supply of a DC current to the concentration cell to maintain a reference oxygen partial pressure therein. A fuel feed control circuit in this system shifts its closed-loop control function to open-loop aiming at a lower air/fuel ratio if the output of the oxygen sensor continues to indicate that actual air/fuel ratio remains on one side of the intended air/fuel ratio due to breaking of the heater. To prevent the engine from stalling or operating unstably due to excessive increase in the air/fuel ratio before the shift to open-loop control, the system includes means for detecting breaking of the heater and immediately interrupting the current supply to the concentration cell in the oxygen sensor thereby forcing the sensor to put out an output which is indicative of a very high air/fuel ratio and, hence, causes the control circuit to lower the air/fuel ratio before the interruption of the closed-loop control.

摘要翻译： 一种空气/燃料比控制系统，包括设置在废气中的氧传感器，以提供反馈信号。 氧传感器是具有加热器的固体电解质浓度电池，并且通过向浓缩电池供应DC电流来操作以在其中维持参考氧分压。 如果氧气传感器的输出继续表明实际的空气/燃料比保持在预期的一侧，该系统中的燃料供给控制电路将其闭环控制功能转换为开环，以较低的空气/燃料比 由于加热器断裂引起的空气/燃料比。 为了防止发动机在转向开环控制之前由于空气/燃料比的过度增加而不稳定或不稳定地操作，该系统包括用于检测加热器的断裂并立即中断向在浓缩池中的浓缩池供应的装置 氧传感器，从而迫使传感器输出表示非常高的空气/燃料比的输出，因此使得控制电路在闭环控制中断之前降低空燃比。

公开(公告)号：US4479866A

公开(公告)日：1984-10-30

申请号：US537549

申请日：1983-10-03

申请人： Kohki Sone ,  Hatsuo Nagaishi ,  Hidehiro Minami ,  Kenji Okamura ,  Yoshitaka Kitagasaki

发明人： Kohki Sone ,  Hatsuo Nagaishi ,  Hidehiro Minami ,  Kenji Okamura ,  Yoshitaka Kitagasaki

IPC分类号： G03G5/06 ,  C09B35/34 ,  G01N27/407 ,  G03G5/05 ,  G01N27/58

CPC分类号： G01N27/4071 ,  G01N27/4077

摘要： A gas sensor, e.g. oxygen sensor of the solid electrolyte concentration cell type, having a gas-sensitive element comprising a plate-shaped substrate fixed to an end portion of the sensor body and a laminate of relatively thin layers. A hollow cylindrical protective hood is attached to the sensor body to enclose the sensitive element therein, and two or more openings are formed in the cylindrical wall of the hood to allow a gas subject to measurement to flow into the interior of the hood and flow out. To avoid direct exposure of the sensitive element, which exhibits directionality in its output characteristics with regard to the gas flow through said openings, each of said openings is located between the sensitive element and the free end of the hood such that a cross-sectional plane intersecting the openings does not intersect the sensitive element.

摘要翻译： 气体传感器，例如 固体电解质浓度单元型的氧传感器，具有固定在传感器主体的端部的板状基板和相对薄的层叠体的气敏元件。 中空的圆柱形保护罩附接到传感器主体以将敏感元件包围在其中，并且在罩的圆柱形壁中形成两个或更多个开口，以允许测量的气体流入罩的内部并流出 。 为了避免敏感元件的直接曝光，其在其通过所述开口的气流方面具有其输出特性的方向性，每个所述开口位于敏感元件和罩的自由端之间，使得横截面 与开口相交并不与敏感元件相交。

公开(公告)号：US4354468A

公开(公告)日：1982-10-19

申请号：US193716

申请日：1980-10-03

申请人： Kohki Sone ,  Okamura Kenji

发明人： Kohki Sone ,  Okamura Kenji

IPC分类号： F02D35/00 ,  F02D37/00 ,  F02D41/14 ,  F02P5/15 ,  G01D21/00 ,  G01N27/26 ,  G01N27/406 ,  G01N27/407 ,  G01N27/409 ,  G05D11/13 ,  F02D5/00

CPC分类号： G01N27/4071 ,  F02D41/1476 ,  F02D41/1494 ,  G01N27/4065

摘要： A system for feedback control of air/fuel ratio in an IC engine, utilizing a recently developed oxygen-sensitive device which is provided with a heater and disposed in exhaust gas to provide a feedback signal. This device has a porous solid electrolyte layer with a measurement electrode layer on one side and a reference electrode on the other side facing a substrate. There is a circuit to supply a heating current to the heater and force a DC current to flow in the solid electrolyte layer to cause migration of oxygen ions through the solid electrolyte toward the reference electrode to thereby establish a reference oxygen partial pressure on the reference side of the solid electrolyte layer. To prevent lowering of this oxygen partial pressure while the engine is operated under a high-load condition and the feedback control is discontinued to feed the engine with a fuel-enriched mixture, the control system includes operating condition sensor means and switching means to interrupt the supply of the current to the heater in response to a command signal from the sensor means and, optionally, current regulating means to increase the intensity of current flowing in the solid electrolyte also in response to the command signal.

摘要翻译： 一种用于IC引擎中的空气/燃料比的反馈控制的系统，利用最近开发的设置有加热器并设置在废气中以提供反馈信号的氧气敏感装置。 该装置具有在一侧具有测量电极层的多孔固体电解质层和面向衬底的另一侧的参考电极。 存在向加热器供给加热电流并迫使直流电流在固体电解质层中流动以使氧离子迁移通过固体电解质朝向参考电极从而在参考侧上建立参考氧分压的电路 的固体电解质层。 为了防止在发动机在高负载条件下运转时该氧分压降低，反馈控制停止，用富燃料混合物供给发动机，控制系统包括操作状态传感器装置和切换装置，以中断 响应于来自传感器装置的命令信号和任选的电流调节装置，还可以响应于命令信号增加在固体电解质中流动的电流强度，来向加热器供应电流。