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    Sensor for measurement of air/fuel ratio
    3.
    发明公开
    Sensor for measurement of air/fuel ratio 失效
    用于测量空气/燃料比的传感器

    公开(公告)号：EP0310063A3

    公开(公告)日：1990-08-22

    申请号：EP88116064.2

    申请日：1988-09-29

    申请人： HITACHI, LTD.

    发明人： Harada, Takeshi ,  Kanamaru, Masatoshi ,  Ibaraki, Yoshiro ,  Terakado, Katsuyoshi ,  Ueno, Sadayasu ,  Ichikawa, Norio

    IPC分类号： G01N27/417

    CPC分类号： G01N27/4075

    摘要： An air/fuel ratio (A/F) sensor for detecting the A/F over a wide range covering a lean region and a rich region which are partitioned by the stoichiometric A/F comprises a solid electrolyte (1) made of an oxygen ion conductive metal oxide, first and second electrodes (2a, 2b) sandwiching the solid electrolyte and being operable by a predetermined voltage applied thereacross to ionize oxygen near the solid electrolyte (1) and diffuse oxygen ions into the solid electrolyte (1), and a gas diffusion layer (3; 3A) in the form of a porous sintered layer covering the second electrode (2b) and made of electrically insulating metal oxide fine particles having a mean particulate size of 1 µm or less so that oxygen or molecules of other gas components in the exhaust gas can move through pores of the gas diffusion layer (3; 3A).

    Oxygen sensor
    6.
    发明公开
    Oxygen sensor 失效
    氧传感器。

    公开(公告)号：EP0121905A1

    公开(公告)日：1984-10-17

    申请号：EP84103756.7

    申请日：1984-04-05

    申请人： HITACHI, LTD.

    发明人： Sasayama, Takao ,  Suzuki, Seikoh ,  Suzuki, Toshitaka ,  Miki, Masayuki ,  Ueno, Sadayasu

    IPC分类号： G01N27/56

    CPC分类号： G01N27/4071 ,  G01N27/4065

    摘要： An oxygen sensor is disclosed in which an airtight reference chamber (32) isolated from a surrounding space is formed on one main surface of a solid electrolyte (10), a current is supplied to the solid electrolyte to pump out oxygen from the reference chamber in such a manner that oxygen in the reference chamber is ionized and then passes through the solid electrolyte, means is provided for transferring oxygen from the surrounding space to the reference chamber in such a manner that oxygen in the surrounding space is ionized and then passes through the solid electrolyte, and the oxygen concentration in the surrounding space is detected on the basis of the current supplied to the solid electrolyte.

    Semiconductor acceleration sensor and vehicle control system using the same
    8.
    发明公开
    Semiconductor acceleration sensor and vehicle control system using the same 失效
    Halbleiterbeschleunigungsmesser und Kraftfahrzeugsteuerungssystemdafür。

    公开(公告)号：EP0459723A2

    公开(公告)日：1991-12-04

    申请号：EP91304732.0

    申请日：1991-05-24

    申请人： HITACHI, LTD. ,  HITACHI AUTOMOTIVE ENGINEERING CO., LTD.

    发明人： Tsuchitani, Shigeki ,  Suzuki, Seiko ,  Miki, Masayuki ,  Tanaka, Tomoyuki ,  Matsumoto, Masahiro ,  Ichikawa, Norio ,  Ebine, Hiromichi ,  Sugisawa, Yukiko ,  Sato, Kanemasa ,  Ueno, Sadayasu ,  Asano, Yasuhiro ,  Kubota, Masanori ,  Suzuki, Masayoshi

    IPC分类号： G01P15/125 ,  G01P1/00 ,  G01P15/13

    CPC分类号： G01P15/125 ,  G01P1/003 ,  G01P15/131 ,  G01P2015/0828

    摘要： A semiconductor acceleration sensor (1) is formed by a cantilever (4) having a conductive movable electrode (5) of predetermined mass at one end, at least one pair of fixed conductive electrodes (8, 9) which are stationary with respect to the movable electrode (5) located on opposing sides of the movable electrode, and gaps provided between the movable electrode and the fixed electrodes. To prevent the movable electrode becoming fused to the contacted fixed electrode, in a first aspect of this invention, an insulating layer (6) is provided between the movable electrode and fixed electrodes, the layer being either on the movable electrode or on the fixed electrodes and in a second aspect of this invention the movable electrode or, preferably, the fixed electrodes, are formed of a high melting point material. In such a second aspect, to improve adhesion between the high melting point material and a substrate (3a, 3b) to which the fixed electrodes (8′, 9′) are mounted, a lower melting point material is firstly coated on said substrates. In a feature of the invention, a detector unit processing circuit (Figure 20) is described in which the output characteristic of the circuit may be digitally adjusted by suitable switching of a plurality of resistors (Rs, Rf), and in a second feature, the sensor chip and the detector unit integrated circuit are located on a common base (303) and mounted in a hermetically sealed chamber to prevent adverse environmental effects affecting operation of the sensor and detector unit assembly. A gas having a dew point of -40°C or lower is, advantageously, charged into the hermetically sealed chamber.

    摘要翻译： 半导体加速度传感器（1）由具有在一端具有预定质量的导电可移动电极（5）的悬臂（4）形成，至少一对固定导电电极（8,9）相对于 位于可动电极的相对侧的可动电极（5）以及设置在可动电极和固定电极之间的间隙。 为了防止可动电极与被接触的固定电极熔合，在本发明的第一方面中，在可动电极和固定电极之间设置绝缘层（6），该层位于可动电极上或固定电极上 在本发明的第二方面中，可动电极，优选地，固定电极由高熔点材料形成。 在这样的第二方面，为了提高高熔点材料与安装有固定电极（8分钟，9分钟）的基板（3a，3b）之间的粘附性，首先在所述基板上涂覆较低熔点的材料。 在本发明的特征中，描述了一种检测器单元处理电路（图20），其中电路的输出特性可以通过多个电阻器（Rs，Rf）的适当切换来数字地调节，并且在第二特征中， 传感器芯片和检测器单元集成电路位于公共基座（303）上并且安装在气密密封的室中，以防止影响传感器和检测器单元组件的操作的不利的环境影响。 将露点为-40℃以下的气体有利地装入密封室内。

    Piezoelectric physical quantity detector
    9.
    发明公开
    Piezoelectric physical quantity detector 失效
    Piezoelektrischer Messaufnehmerfüreine physikalischeGrösse。

    公开(公告)号：EP0350153A2

    公开(公告)日：1990-01-10

    申请号：EP89304525.2

    申请日：1989-05-05

    申请人： HITACHI, LTD.

    发明人： Ueno, Sadayasu

    IPC分类号： G01P15/09 ,  G01P15/125

    CPC分类号： G01P15/09 ,  G01L1/162

    摘要： A piezoelectric detector for detecting a physical quantity comprising, a piezoelectric device having a first electrode and a second electrode for modulating a carrier A.C., a excitation power source for supplying the carrier A.C. to the first electrode so as to excite the piezoelectric device, a weight mechanically coupled to the piezoelectric device so as to apply the physical quantity to the piezoelectric device, an A.C. amplifier for amplifying a modulated output from the second electrode, and a demodulator for demodulating an amplified output from the A.C. amplifier.
    The piezoelectric detector measures the physical quantity having the very low frequency range including D.C. component.

    摘要翻译： 一种用于检测物理量的压电检测器，包括：具有第一电极和用于调制载体AC的第二电极的压电装置，用于将载流子AC供应到第一电极以激励压电装置的激励电源， 机械耦合到压电装置，以将物理量施加到压电装置，用于放大来自第二电极的调制输出的AC放大器，以及用于解调来自AC放大器的放大输出的解调器。 压电检测器测量具有包括直流分量的非常低的频率范围的物理量。

    Gas sensor for measuring airfuel ratio and method of manufacturing the gas sensor
    10.
    发明公开
    Gas sensor for measuring airfuel ratio and method of manufacturing the gas sensor 失效
    Gassensorfürdie Messen des Luft / Treibstoff-Verhältnissesund Herstellungsverfahrenfürden Gassensor。

    公开(公告)号：EP0345770A1

    公开(公告)日：1989-12-13

    申请号：EP89110370.7

    申请日：1989-06-08

    申请人： HITACHI, LTD.

    发明人： Kanamaru, Masatoshi ,  Harada, Takeshi ,  Ibaraki, Yoshiro ,  Ueno, Sadayasu ,  Ichikawa, Norio

    IPC分类号： G01N27/416

    CPC分类号： G01N27/4075 ,  G01N27/4077

    摘要： The invention relates to a gas sensor for measuring an air-fuel ratio of an air-fuel mixture of an internal combustion engine and to a method of manu­facturing the gas sensor. The sensor of the invention comprises: a solid state electrolyte layer (1) made of an oxygen ion conductive metal oxide; a first electrode (2a) of a porous thin film having the catalyst function which was coated on one surface of the solid state electrolyte layer (1); a second electrode (2b) of a porous thin film having the catalyst function which was coated on the other surface of the solid state electrolyte layer (1); an electrode shielding layer (10) made of a sintered material of ultra fine particulates whose average grain diameter is 1 µm or less which covers the surface other than the region of a predetermined area of the second electrode (2b); and a gas diffused layer (3) made of a porous electric insulative metal oxide which covers the region of the predetermined area of at least the second electrode (2b).

    摘要翻译： 本发明涉及一种用于测量内燃机的空气燃料混合物的空燃比的气体传感器及其制造方法。 本发明的传感器包括：由氧离子导电金属氧化物制成的固态电解质层（1）; 具有涂覆在固态电解质层（1）的一个表面上的具有催化剂功能的多孔薄膜的第一电极（2a）; 具有催化剂功能的多孔薄膜的第二电极（2b），其涂覆在固态电解质层（1）的另一表面上; 电极屏蔽层（10），其由覆盖除了所述第二电极（2b）的预定区域的区域以外的表面的平均粒径为1μm以下的超微粒的烧结体构成; 以及覆盖至少第二电极（2b）的预定区域的区域的由多孔电绝缘金属氧化物制成的气体扩散层（3）。