<p>An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; calculating knock intensity N based on a result of comparison between the detected waveform and a knock waveform model prepared in advance as a vibration waveform when knocking occurs; determining that knocking occurred when the knock intensity N is larger than a predetermined reference value; and determining that knocking has not occurred when the knock intensity N is not larger than the predetermined reference value.</p>
申请公布号
EP1880180(A1)
申请公布日期
2008.01.23
申请号
EP20060745984
申请日期
2006.04.25
申请人
TOYOTA JIDOSHA KABUSHIKI KAISHA;DENSO CORPORATION;NIPPON SOKEN, INC.