高速汽油机循环内转速波动实时测量系统研制  

Design of In-Cycle Speed Fluctuation Measurement System for High-Speed Gasoline Engines

作　　者：吴锋[1] 胡章其[1] 朱建新[1] 

机构地区：[1]浙江大学,杭州310027

出　　处：《内燃机工程》2001年第4期70-72,77,共4页Chinese Internal Combustion Engine Engineering

摘　　要：设计了一种高速汽油机循环内转速波动实时测量系统 ,采用专门设计的光电轴角编码器获取曲轴转角信号 ,辅助以点火脉冲感应信号来判定上止点位置。采用计算机DMA数据传输技术 ,配以 70MHz记数器实现任意转速下的循环内转速波动测量 ,并采用数字低通滤波器处理高频干扰信号。A real-time in-cycle speed fluctuation measurement system has been designed for high-speed gasoline engines by using a specially designed optic electric angle encoder to gain the crankshaft angular signal and an ignition induction signal to ensure the TDC plsition. By using the DMA method with a 70MHz counter and a data transfer, the in-cycle speed fluctuation at any engine speeds is measured, while the low-pass algorithms are used to eliminate the high frequency interference signal.

关 键 词：转速波动 汽油机 数字低通滤波器 实时测量系统 光栅 光电轴角编码器 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]