可控自燃光学发动机系统设计与开发

Design and Development of CAI Optical Engine System

设计开发了可实现火花点火和可控自燃的光学发动机系统。在1台金属发动机上设计了带有光学窗口的加长活塞、加长缸套,实现了缸内光信号的可视化;设计了缸盖和缸体之间的带有激光出入射窗口的环垫,实现了可用激光激发缸内工质的光学通路。基于Intel 80c196KC单片机设计了光学发动机电控系统硬件电路和软件程序,配合安装在进排气门上的无凸轮全可变配气机构,可以灵活地控制进排气门定时,从而可在光学发动机内实现不同废气再循环策略下的可控自燃。试验表明,光学发动机系统运转良好,为在光学发动机上进行的光学测量提供了基础。

An optical SI/CAI engine system was developed.The lengthened piston with an optical window and the lengthened liner were designed on a metal engine,which achieved the visualization of in-cylinder optical signal.A designed annular gasket with optical window was laid below the cylinder head,which formed the optical path that excited the working substance with the laser.Based on Intel 80c196KC SCM,the hardware circuit and software program of electronic control system for an optical engine were designed,the flexible control of intake and exhaust valve was further realized with the fully variable valve train,and the CAI combustion under different EGR strategies was achieved.The test results show that the engine system runs well,which brings the reference for the optical measurement in the optical engine.