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    • 139. 发明授权
    • Control for determining a firing timing of an internal-combustion engine
    • 用于确定内燃机的点火正时的控制
    • US07909018B2
    • 2011-03-22
    • US12222782
    • 2008-08-15
    • Tetsuya IshiguroShusuke AkazakiYuji Yamamoto
    • Tetsuya IshiguroShusuke AkazakiYuji Yamamoto
    • F02P5/00
    • F02D35/024F02D35/023F02D35/028F02D41/2416F02D41/34F02P5/00F02P7/06
    • A control for determining a firing timing of an engine is provided. An in-cylinder pressure is detected at a predetermined time interval. An in-cylinder pressure for every predetermined crank angle is calculated based on the detected in-cylinder pressure. A motoring pressure in a case where combustion is not performed in the engine is estimated. It is detected that a pressure difference between the calculated in-cylinder pressure and the motoring pressure has exceeded a determination value. A time point is identified, as a firing timing, at which the pressure difference has exceeded a determination value with a finer resolution than the resolution of the predetermined crank angle interval through an interpolation calculation. The interpolation calculation uses a first crank angle when it is detected that the pressure difference has exceeded the determination value, the pressure difference corresponding to the first crank angle, a second crank angle previous to the first crank angle by the predetermined crank angle and a pressure difference corresponding to the second crank angle.
    • 提供了一种用于确定发动机的点火正时的控制。 以预定的时间间隔检测缸内压力。 基于检测到的缸内压力计算每个预定曲柄角的缸内压力。 估计在发动机不进行燃烧的情况下的驾驶压力。 检测出计算出的缸内压力和驾驶压力之间的压力差超过了确定值。 通过内插计算,将时间点识别为具有比通过预定的曲柄角间隔的分辨率更精细的分辨率的压力差超过确定值的点火时刻。 当检测到压力差已经超过确定值,对应于第一曲柄角的压力差,第一曲柄角之前的预定曲柄角的第二曲柄角和压力时,插值计算使用第一曲柄角 差异对应于第二曲柄角度。