公开(公告)号：US4002155A

公开(公告)日：1977-01-11

申请号：US648313

申请日：1976-01-12

申请人： John L. Harned ,  Donald F. Herrick

发明人： John L. Harned ,  Donald F. Herrick

IPC分类号： F02P5/152 ,  F02P5/153 ,  G01H17/00 ,  G01M15/00 ,  F02P11/02

CPC分类号： F02P5/152 ,  Y02T10/46

摘要： In a spark ignition internal combustion engine, an accelerometer is mounted on an engine component, preferably the intake manifold, and senses vibration including individual ringing vibrations due to engine knock or detonation. A reference signal is derived from the accelerometer signal during the portion of the engine cycle prior to possible knock-induced vibrations, which signal indicates the background accelerations due to noise. The number of individual ringing vibrations exceeding the reference signal during a predetermined amount of engine crankshaft rotation is counted. When the number of such counts exceeds a predetermined number during the predetermined crankshaft rotation, engine spark timing is retarded. If the number of such counts is less than a predetermined number during the predetermined crankshaft rotation, engine spark is advanced.

摘要翻译： 在火花点火式内燃机中，将加速度计安装在发动机部件上，优选地安装在进气歧管上，并且感测包括由于发动机爆震或引爆引起的各种振铃振动的振动。 在可能的撞击引起的振动之前的发动机循环的部分期间，来自加速度计信号的参考信号，该信号指示由噪声引起的背景加速度。 计算在预定量的发动机曲轴旋转期间超过参考信号的单个振动振动的数量。 当预定的曲轴旋转期间这样的计数的数量超过预定数量时，发动机火花正时被延迟。 如果在预定的曲轴旋转期间这样的计数的数量小于预定数量，则发动机火花提前。