Patent ID: 9164012
Filing Date: 2015-10-20
Classification: F02D,G01L,G01M

Abstract:
1. An internal combustion engine knock controlling apparatus comprising: a sensor configured to output a signal based on vibration of an internal combustion engine; a knock signal calculator configured to calculate, from an output of the sensor, a knock signal at every ignition timing; a knock signal standard statistic calculator configured to calculate a standard statistic of the knock signal by first filtering processing of the knock signal; a knock determination threshold calculator configured to calculate a knock determination threshold value for determining knock based on the standard statistic of the knock signal; a knock determiner configured to determine that the knock has occurred if the knock signal exceeds the knock determination threshold value; an operating state value detector configured to detect operating state values each indicating an operating condition of the internal combustion engine; an operating state value deviation normalizer configured to calculate post-normalization operating state value deviations by normalizing deviations between the detected operating state values and values obtained by second filtering processing of the detected operating state values, using a representative value of the operating state values; a transition correction factor calculator configured to calculate a transition correction factor based on the post-normalization operating state value deviations; a filter coefficient corrector configured to correct a filter coefficient used in the first filtering processing performed by the knock signal standard statistic calculator, based on the transition correction factor; and a filter characteristic adjuster configured to adjust a response characteristic of the second filtering processing performed by the operating state value deviation normalizer to be equal to a response characteristic of the first filtering processing performed by the knock signal standard statistic calculator.