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    • 31. 发明授权
    • Air-fuel ratio sensor
    • 空燃比传感器
    • US5340462A
    • 1994-08-23
    • US74295
    • 1993-06-09
    • Hiroyoshi Suzuki
    • Hiroyoshi Suzuki
    • G01N27/419F02D41/14G01N27/406G01N27/417G01N27/26
    • G01N27/4065F02D41/1481F02D41/1494G01N27/417
    • An air-fuel ratio sensor comprises an oxygen concentration cell device, an oxygen pump device, a heater for heating the oxygen concentration cell device and the oxygen pump device, a pump current cut means for stopping the supply of the pump current, first and second timers for controlling the condition of stopping the pump current, and a controller for starting the heating of the heater under the condition of stopping the pump current, to the pump device and for removing the stopping of the pump current for a predetermined time at predetermined intervals from the starting of supplying power to the heater, by means of the first timer, wherein when the pump current shows a predetermined value or higher, the pump current is stopped and the second timer is started, and when the operation of the second timer is finished, the judgment of the activation of the sensor is made, and at the same time, the stopping of the pump current is removed.
    • 空燃比传感器包括氧浓度电池装置,氧气泵装置,用于加热氧浓缩电池装置的加热器和氧气泵装置,用于停止泵电流的供给的泵电流切断装置,第一和第二 用于控制停止泵电流的状态的定时器,以及用于在停止泵电流的情况下启动加热器的加热的控制器,并且以预定的间隔去除泵电流停止预定的时间 从开始通过第一定时器向加热器供电,其中当泵电流显示预定值或更高时,泵电流停止并且第二定时器启动,并且当第二定时器的操作是 完成了传感器的激活判断,同时消除了泵电流的停止。
    • 34. 发明授权
    • EGR control device for internal combustion engine
    • 内燃机EGR控制装置
    • US4790286A
    • 1988-12-13
    • US126059
    • 1987-11-27
    • Minoru NishidaNoriyuki InoueYoshiaki AsayamaHiroyoshi Suzuki
    • Minoru NishidaNoriyuki InoueYoshiaki AsayamaHiroyoshi Suzuki
    • F02D21/08F02M25/06
    • F02D41/0052F02D41/144Y02T10/47
    • An EGR device for an IC engine is disclosed which comprises an EGR control valve installed in an EGR passageway communicating with an exhaust system and an intake system of an internal combustion engine, an oxygen sensor for detecting the oxygen content of the intake air installed in the downstream of the opening of the EGR passageway in said intake system, a pressure sensor for detecting the atmospheric pressure in the oxygen sensor, and an EGR controller for computing a first quantity corresponding to a target exhaust gas reflux rate, correcting the output signal of the oxygen sensor using the output signal of the pressure sensor, and opening or shutting said EGR control valve in proportion to the deviation of the second quantity thus corrected from the first quantity in order to set the operating condition of the engine in conformity with a predetermined target EGR rate.
    • 公开了一种用于IC发动机的EGR装置,其包括安装在与排气系统连通的EGR通路中的EGR控制阀和内燃机的进气系统,用于检测安装在内燃机中的进气的氧含量的氧传感器 在所述进气系统中的EGR通道的开口的下游,用于检测氧传感器中的大气压的压力传感器和用于计算对应于目标废气回流速率的第一量的EGR控制器,校正所述氧气传感器的输出信号 氧传感器,其使用压力传感器的输出信号,并且与第一量的第二量的偏差成比例地打开或关闭所述EGR控制阀,以便将发动机的运行状态设定为与预定目标 EGR率。
    • 40. 发明授权
    • Device for determining activation of an air-fuel ratio sensor
    • 用于确定空气 - 燃料比传感器的激活的装置
    • US5172678A
    • 1992-12-22
    • US842624
    • 1992-02-27
    • Hiroyoshi Suzuki
    • Hiroyoshi Suzuki
    • G01N27/419F02D41/14G01N27/406
    • G01N27/4065F02D41/148F02D41/1494
    • A device for determining activation of an air-fuel ratio sensor which comprises an air-fuel ratio sensor comprising an air-fuel ratio sensor comprising an oxygen concentration cell element and an oxygen pump element arranged in an exhaust system of an engine provided with electrodes and an interposing diffusion chamber wherein exhaust gas is diffused and introduced, and a heater for heating the oxygen concentration cell element and the oxygen pump element; a pump current controlling means for controlling pump current which flows in the pump element so that the electromotive force of the concentration cell element becomes a predetermined reference voltage; a pump current detecting means; a pump current cutting means; a pump voltage detecting means; a heater power supplying means; a memorizing means for memorizing a previous pump voltage allowable range for the pump current or a target air-fuel ratio of the engine; and a timer means operated at every predetermined time interval for starting the heater supplying power means to the heater during a pump-current-cut state and for releasing the cutting supply of the pump current during the predetermined time interval. The air-fuel ratio controlling device detects a pump voltage which determines that the air-fuel ratio sensor is activated when the pump voltage falls from the previously memorized pump voltage allowable range, and then releases the pump-current-cut state.