KNOCKING DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE
    2.
    发明公开
    KNOCKING DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE 有权
    爆震判定设备,用于内燃机

    公开(公告)号:EP1896815A1

    公开(公告)日:2008-03-12

    申请号:EP06767291.5

    申请日:2006-06-19

    IPC分类号: G01L23/22

    CPC分类号: G01L23/225

    摘要: An engine ECU 200 includes a bandpass filter (1) (410), a bandpass filter (2) (420), and a bandpass filter (3) (430). The bandpass filter (1) (410) extracts only vibrations at a first frequency band A from the vibrations detected by a knock sensor. The bandpass filter (2) (420) extracts only vibrations at a second frequency band B from the vibrations detected by the knock sensor. The bandpass filter (3) (430) extracts only vibrations at a third frequency band C from the vibrations detected by the knock sensor. The first to third frequency bands A-C are identical in bandwidth. The engine ECU (200) calculates a peak value in magnitude of vibrations in a synthesized waveform of these frequency bands, and determines whether knocking occurred or not based on the peak value.