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1. 发明授权

US5535722A Knock detection system and control method for an internal combustion engine 失效
标题翻译：内燃机爆震检测系统及控制方法
公开(公告)号：US5535722A
公开(公告)日：1996-07-16
申请号：US265894
申请日：1994-06-27
申请人： William J. Graessley , James Zehnal , Kevin R. Carlstrom , Mitchell A. Deperno , Daniel P. Bartolucci , James W. Forbes
发明人： William J. Graessley , James Zehnal , Kevin R. Carlstrom , Mitchell A. Deperno , Daniel P. Bartolucci , James W. Forbes
IPC分类号： G01L23/22 , F02P5/14
CPC分类号： G01L23/225
摘要： A knock control system for internal combustion engines comprising a knock sensor and a knock detection circuit that uses an electronic engine controller. The knock sensor creates an electrical output signal indicating the presence of engine structure vibrations resulting from engine combustion characteristics. The circuit filters the knock sensor signal, time gated at independent crankshaft angles, and transfers it to a noise channel and to a knock channel. A comparator distinguishes between background vibration and vibrations during the combustion event that are due to knock. The knock detection function, along with the crankshaft angle position reference signal, develops time gated "snapshot" signals indicating the magnitudes for both the background noise and the vibrations created by denotation and distinguishes between them. These signals are processed by the knock detection system along with the engine controller's other system variables to influence engine control parameter changes to prevent further knock.
摘要翻译：一种用于内燃机的爆震控制系统，其包括使用电子发动机控制器的爆震传感器和爆震检测电路。爆震传感器产生一个电输出信号，指示是否存在由发动机燃烧特性引起的发动机结构振动。电路对爆震传感器信号进行滤波，时间以独立曲轴角度门控，并将其传送到噪声通道和爆震通道。比较器区分背景振动和由于敲击引起的燃烧事件期间的振动。敲击检测功能以及曲轴角位置参考信号，产生时间选通“快照”信号，指示背景噪声和由指示产生的振动的幅度，并区分它们。这些信号由爆震检测系统以及发动机控制器的其他系统变量进行处理，以影响发动机控制参数的变化，以防止进一步爆震。

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