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    • 53. 发明授权
    • Power supply control system for heater used in gas sensor
    • 用于气体传感器的加热器电源控制系统
    • US06870142B2
    • 2005-03-22
    • US10157866
    • 2002-05-31
    • Satoshi HadaEiichi KurokawaMitsunobu Niwa
    • Satoshi HadaEiichi KurokawaMitsunobu Niwa
    • G01N27/41F02D41/14G01N27/406G01N27/416G01N27/419H05B1/02
    • H05B1/0236F02D41/1494G01N27/4067
    • A heater control system is provided for controlling the temperature of a heater used to heat a solid electrolyte-made sensor element of a gas concentration sensor up to a given temperature at which the sensor element is activated to provide a correct gas concentration output for controlling a preselected variable used in, for example, an automotive air-fuel ratio control system. The heater control system measures a resistance value of the sensor element and controls an electric power supplied to the heater as a function of the resistance value. The heater control system is designed to determine a controlled variable properly used to control the heater, thereby resulting in improved controllability of a power supply to the heater and also works to minimize an error in determining the resistance of the heater.
    • 提供一种加热器控制系统,用于控制用于加热气体浓度传感器的固体电解质制成的传感器元件的加热器的温度,直到传感器元件被激活的给定温度,以提供用于控制传感器元件的正确的气体浓度输出 用于例如汽车空燃比控制系统中的预选变量。 加热器控制系统测量传感器元件的电阻值,并根据电阻值控制供应给加热器的电力。 加热器控制系统被设计成确定适当地用于控制加热器的受控变量,由此导致对加热器的电源的可控性提高,并且还用于最小化确定加热器电阻的误差。
    • 55. 发明授权
    • Power supply control system for heater used in gas sensor
    • 用于气体传感器的加热器电源控制系统
    • US06720534B2
    • 2004-04-13
    • US10158110
    • 2002-05-31
    • Satoshi HadaEiichi KurokawaAkio Tanaka
    • Satoshi HadaEiichi KurokawaAkio Tanaka
    • H05B102
    • G01N27/4067
    • A heater control apparatus used for a gas concentration sensor heats a sensor element including a solid electrolyte body up to a desired activation temperature. The heater control apparatus determines an actual resistance value of the sensor element, controls a power supply to the heater as a function of a difference between the actual resistance value and a target one, determines a power supplied to the heater, and determines a reference resistance value of the sensor element based on a predetermined fundamental relation between a power used in the heater and a resistance value of the sensor element to correct the target resistance value as a function of a difference between the reference resistance value and the actual resistance value.
    • 用于气体浓度传感器的加热器控制装置将包括固体电解质体的传感器元件加热至所需的活化温度。 加热器控制装置确定传感器元件的实际电阻值,根据实际电阻值和目标电阻值之间的差来控制加热器的电源,确定供给加热器的功率,并确定参考电阻 基于加热器中使用的功率与传感器元件的电阻值之间的预定基本关系的传感器元件的值作为参考电阻值与实际电阻值之差的函数来校正目标电阻值。
    • 57. 发明授权
    • Gas concentration measuring apparatus compensating for error component of output signal
    • 补偿输出信号误差分量的气体浓度测量装置
    • US06336354B1
    • 2002-01-08
    • US09497179
    • 2000-02-03
    • Toshiyuki SuzukiEiichi KurokawaTomoo KawaseSatoshi Hada
    • Toshiyuki SuzukiEiichi KurokawaTomoo KawaseSatoshi Hada
    • G01N2712
    • G01N27/4067
    • A gas concentration measuring apparatus is provided which measures the concentration of a given gas using a gas sensor. The gas sensor includes a sensor element producing a gas concentration signal indicative of the concentration of the gas, a heater heating the sensor element, and an insulator disposed between the sensor element and the heater. The apparatus includes a heater control circuit which may provisionally supply electrical power to the heater by applying a Pulse-Width-Modulated signal. The heater control circuit performs a switching operation to supply power to the heater cyclically. The apparatus corrects an error contained in the gas concentration signal arising from a leakage current flowing into the sensor element through the insulator during the switching operation of the heater control circuit.
    • 提供一种气体浓度测量装置,其使用气体传感器测量给定气体的浓度。 气体传感器包括产生指示气体浓度的气体浓度信号的传感器元件,加热传感器元件的加热器和设置在传感器元件和加热器之间的绝缘体。 该装置包括加热器控制电路,该加热器控制电路可通过施加脉冲宽度调制信号临时向加热器供电。 加热器控制电路执行切换操作以循环地向加热器供电。 该装置在加热器控制电路的切换操作期间,通过绝缘体校正由流入传感器元件的漏电流引起的气体浓度信号中包含的误差。
    • 58. 发明授权
    • Gas sensing element and a method for measuring a specific gas concentration
    • 气体传感元件和测定特定气体浓度的方法
    • US06205843B1
    • 2001-03-27
    • US09440859
    • 1999-11-16
    • Akio TanakaTomio SugiyamaShinichiro ImamuraSatoshi HadaKeigo Mizutani
    • Akio TanakaTomio SugiyamaShinichiro ImamuraSatoshi HadaKeigo Mizutani
    • G01N27407
    • G01N27/419
    • A gas sensing element having a sample gas chamber into which a sample gas is introduced, and a reference gas chamber into which a reference gas is introduced. A sensor cell detects a specific gas concentration in the sample gas chamber. An oxygen pump cell pump cell pumps oxygen gas from or to the sample gas chamber. An introducing passage includes at least one pinhole provided on a surface of the oxygen pump cell for introducing the measuring gas into the sample gas chamber. The surface of the oxygen pump cell faces an outside of the gas sensing element. And, a porous diffusion resistive layer is provided on the surface of the oxygen pump cell so as to cover a portion corresponding to the introducing passage, thus serving to reduce or eliminate the effects of temperature dependency upon gas sensor output for properly sized and machine pinholes.
    • 具有被引入样本气体的样本气体室的气体传感元件和引入参考气体的参考气体室。 传感器单元检测样品气体室中的特定气体浓度。 氧气泵电池泵电池将氧气从或来自样品气室泵送。 引入通道包括设置在氧泵单元的表面上的至少一个针孔,用于将测量气体引入样气室。 氧气泵单元的表面面向气体感测元件的外部。 并且,在氧泵电池的表面上设置多孔扩散电阻层,以覆盖对应于引入通道的部分,从而用于减小或消除对气体传感器输出的温度依赖性对适当尺寸和机针孔的影响 。