FAILURE DETECTION APPARATUS FOR GAS SENSOR AND FAILURE DETECTION METHOD FOR GAS SENSOR

    公开(公告)号:EP3650848A1

    公开(公告)日:2020-05-13

    申请号:EP19207122.3

    申请日:2019-11-05

    IPC分类号: G01N27/417

    摘要: A failure detection apparatus for a gas sensor includes an electronic control unit (12) configured to: perform control so that a predetermined voltage, which is a positive voltage and is a voltage lower than a limiting current range when the gas sensor (10) does not fail, is applied between a pair of electrodes (102, 103); acquire a determination current, which is a current flowing between the pair of electrodes when the predetermined voltage is applied between the pair of electrodes; and determine whether the gas sensor fails based on the acquired determination current.