Control apparatus for gas sensor
    21.
    发明授权
    Control apparatus for gas sensor 有权
    气体传感器控制装置

    公开(公告)号:US07084379B2

    公开(公告)日:2006-08-01

    申请号:US11082902

    申请日:2005-03-18

    IPC分类号: H05B1/02

    CPC分类号: F02D41/1494 G01N33/007

    摘要: A control apparatus for a gas sensor, wherein a microcomputer 44, which is connected to an oxygen sensor 30 including a detection element 12 and a heater 14, detects the cooling water temperature Tw of the engine. The control apparatus determines that condensation water within the exhaust pipe is being generated when the cooling water temperature Tw is equal to or lower than 0° C. When equal to or lower than 0° C., the microcomputer 44 supplies to the heater 14 electrical power for maintaining the temperature of the detection element 12 within the range of 100° C. to a splash-water-cracking generation temperature (e.g., about 300° C.) at or above which cracking can occur in a laminated-type oxygen sensor element 10 due to splash of condensation water. Electrical power is supplied to the heater 14 such that a pulse signal Sh is output from the microcomputer 44, and the heater 14 is pulse-driven by use of a heater electrification control circuit 34.

    摘要翻译: 一种用于气体传感器的控制装置,其中连接到包括检测元件12和加热器14的氧传感器30的微计算机44检测发动机的冷却水温度Tw。 当冷却水温度Tw等于或低于0℃时,控制装置确定排气管内的冷凝水正在产生。当等于或低于0℃时,微计算机44向加热器14供应电 用于将检测元件12的温度保持在100℃的范围内的功率达到或高于其中的飞溅水裂解发生温度(例如,约300℃),其中层压型氧传感器 元素10由于冷凝水溅出。 向加热器14提供电力,使得从微计算机44输出脉冲信号Sh,并且通过使用加热器通电控制电路34对加热器14进行脉冲驱动。