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1. 发明授权

US5027774A Spark ignition engines 失效
标题翻译：火花点火发动机
公开(公告)号：US5027774A
公开(公告)日：1991-07-02
申请号：US477086
申请日：1990-02-08
申请人： Ryszard K. Dutkiewicz , Teodors Priede
发明人： Ryszard K. Dutkiewicz , Teodors Priede
IPC分类号： F02B1/04 , F02P5/152 , F02P11/00 , F02P11/06 , G01L23/22
CPC分类号： F02P5/152 , F02P11/00 , F02P11/06 , G01L23/225 , F02B1/04 , Y02T10/46
摘要： There is described a motor vehicle having a spark ignition engine in an engine compartment and having automatic advance and retard device to advance or retard the angle of the firing of the spark relative to the top dead center of the pistons in the cylinders of the spark ignition engine. The engine has a control device including a microphone carried on a vibration damping mounting on the vehicle close to the engine to detect sounds emitted during the running of the vehicle. A frequency filter is connected to the microphone connected to the detector to permit transmission of sound only in a narrow band of sound frequencies between 4,000 and 20,000 Hz which correspond to the sound range of sounds caused by knock. The output from the filter is compared with a datum and when this exceeds such datum, the automatic advance and retard is retarded to prevent knock continuing.
摘要翻译：描述了一种在发动机舱中具有火花点火发动机并具有自动提前和延迟装置的机动车辆，以推进或延迟相对于火花点火的气缸中的活塞的上止点的火花点火的角度发动机。发动机具有控制装置，该控制装置包括麦克风，该麦克风承载在靠近发动机的车辆上安装的减振器，以检测在车辆行驶期间发出的声音。频率滤波器连接到连接到检测器的麦克风，以允许声音传输在4,000至20,000Hz之间的声频的窄带中，其对应于由敲击引起的声音的声音范围。将过滤器的输出与基准进行比较，当超过此基准时，自动进给和延迟被延迟以防止爆震持续。

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