发明申请
- 专利标题: ANOMALY DIAGNOSING APPARATUS AND ANOMALY DIAGNOSING METHOD FOR GAS SENSOR
- 专利标题(中): 气体传感器异常诊断装置和异常诊断方法
-
申请号: US12571928申请日: 2009-10-01
-
公开(公告)号: US20100084287A1公开(公告)日: 2010-04-08
- 发明人: Satoshi TERAMOTO , Shigeki Mori , Hiroki Inouchi
- 申请人: Satoshi TERAMOTO , Shigeki Mori , Hiroki Inouchi
- 申请人地址: JP Nagoya
- 专利权人: NGK SPARK PLUG CO., LTD.
- 当前专利权人: NGK SPARK PLUG CO., LTD.
- 当前专利权人地址: JP Nagoya
- 优先权: JP2008-257446 20081002
- 主分类号: G01N27/26
- IPC分类号: G01N27/26
摘要:
An anomaly diagnosing apparatus and method for a gas sensor which includes a heater control section; a measurement section which outputs a detection signal for detecting an internal resistance of the gas sensor through a solid electrolyte via connection terminals and the electrodes within the gas sensor and which measures the internal resistance of the gas sensor based on a response signal input via the connection terminals in response to the output of the detection signal; and a diagnosing section which heats the solid electrolyte by use of the heater control section, obtains, after the start of heating, a first time required to reach a first resistance and a second time required to reach a second resistance different from the first resistance, and determines whether or not the gas sensor is anomalous by comparing a predetermined threshold value and a ratio of the first to second times.