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    • 1. 发明授权
    • Sensor control apparatus, sensor control system, and sensor control method
    • 传感器控制装置,传感器控制系统和传感器控制方法
    • US09297778B2
    • 2016-03-29
    • US13418903
    • 2012-03-13
    • Hirotaka OnogiKenji KatoSatoshi Teramoto
    • Hirotaka OnogiKenji KatoSatoshi Teramoto
    • G01N27/407
    • G01N27/4074
    • A sensor control apparatus is disclosed, including a preliminary control for supplying a constant current to a second oxygen pump cell of a gas sensor for a constant period of time so as to control to a constant level the amount of oxygen pumped out from a second measurement chamber (S40 to S50). At the beginning of drive control (S55 to S80), oxygen is pumped back into the second measurement chamber. During the pumping back operation, an NOX concentration correspondence value has a large time course change and is not stable. The NOX concentration correspondence value is corrected using correction data common among gas sensors, wherein the timing for applying the correction data is adjusted by making use of an application time determined in accordance with individual differences of each gas sensor.
    • 公开了一种传感器控制装置,其包括用于向恒定时间段的气体传感器的第二氧气泵室提供恒定电流的初步控制,以便将从第二测量泵出的氧气量控制在恒定水平 (S40〜S50)。 在驱动控制开始时(S55〜S80),氧被泵回第二测量室。 在抽吸操作期间,NOX浓度对应值具有大的时程变化并且不稳定。 使用在气体传感器中公知的校正数据来校正NO x浓度对应值,其中通过利用根据每个气体传感器的个体差异确定的施加时间来调整用于应用校正数据的定时。
    • 2. 发明授权
    • Gas sensor element and gas sensor
    • 气体传感器元件和气体传感器
    • US08992752B2
    • 2015-03-31
    • US13401221
    • 2012-02-21
    • Masaki OnkawaShigehiro OtsukaSeiji OyaSatoshi TeramotoKuniharu TanakaTakeshi Mitsuoka
    • Masaki OnkawaShigehiro OtsukaSeiji OyaSatoshi TeramotoKuniharu TanakaTakeshi Mitsuoka
    • G01N27/407
    • G01N27/4077
    • There is provided a gas sensor element for detecting the concentration of a specific gas component in gas under measurement, which includes a plate-shaped element body and a porous protection layer. The element body has, at one end portion thereof, a gas sensing portion formed with a solid electrolyte substrate and a pair of electrodes. The porous protection layer has a porous structure formed of ceramic particles and surrounds at least the circumference of the one end portion of the element body. In the present invention, the porous protection layer has an inner region, an intermediate region and an outer region laminated together in order of mention from the element body toward the outside. The intermediate region has a porosity lower than those of the inner and outer regions. There is also provided a gas sensor with such a gas sensor element.
    • 提供了一种气体传感器元件,用于检测测量气体中特定气体成分的浓度,包括板状元件体和多孔保护层。 元件体的一端具有形成有固体电解质基板和一对电极的气体检测部。 多孔保护层具有由陶瓷颗粒形成的多孔结构,并且至少包围元件主体的一个端部的周边。 在本发明中,多孔保护层具有从元件体朝向外侧依次层叠的内部区域,中间区域和外部区域。 中间区域的孔隙率低于内部和外部区域的孔隙率。 还提供了具有这种气体传感器元件的气体传感器。
    • 5. 发明授权
    • Air fuel ratio detection apparatus
    • 空燃比检测装置
    • US07964073B2
    • 2011-06-21
    • US11604218
    • 2006-11-27
    • Masamichi HiraiwaTakeshi KawaiSatoshi TeramotoShigeki MoriHiroshi Inagaki
    • Masamichi HiraiwaTakeshi KawaiSatoshi TeramotoShigeki MoriHiroshi Inagaki
    • G01N27/419
    • G01N27/419
    • Using a gas detection voltage Vs output from a terminal CU, a determination is made at to whether, after startup of an air-fuel ratio detection apparatus (1), a full-range air-fuel ratio sensor (10) has reached a semi-activated state in which a determination can be made as to whether the air-fuel ratio is on the rich or lean side based on a change in a gas detection signal Vic. After determining that the sensor has reached the semi-activated state, the signal Vic is compared with a threshold to determine whether the air-fuel ratio is on the rich or lean side. In the apparatus (1), the potential difference between an outer pump electrode of a pump cell (14) and a reference electrode of an oxygen concentration measurement cell (24) is obtained via a first differential amplification circuit (53) as the gas detection signal Vic, the signal Vic being highly responsive to a change in air-fuel ratio of exhaust gas.
    • 使用从端子CU输出的气体检测电压Vs,判定在空燃比检测装置(1)启动后,全范围空燃比传感器(10)到达半空 基于气体检测信号Vic的变化,能够进行空燃比是富气还是偏侧的判定。 在确定传感器已经达到半激活状态之后,将信号Vic与阈值进行比较,以确定空燃比是富有还是偏侧。 在装置(1)中,通过作为气体检测器的第一差分放大电路(53)获得泵电池(14)的外泵电极与氧浓度测定电池(24)的参比电极之间的电位差 信号Vic,信号Vic对废气的空燃比变化高度响应。