汽车专业英语读译教程 作者 宋进桂_ 8-U4TB.ppt

UNIT 4GASOLINE FUEL INJECTION  TEXT B Operation of the Motronic System   UNIT 4  GASOLINE FUEL INJECTION  TEXT B Operation of the Motronic System  ? Start Control ( Fuel, Ignition Timing, Air) ? Post-Start ? Warm-Up ? Closed-Loop Operation ? Part-Throttle Acceleration ? Full-Load Acceleration ? Knock Control ? RPM Limitation ? Coasting Cut-Off 本次课学习目标 掌握MOTRONIC系统的控制原理 掌握有关控制原理的专用术语 了解翻译技巧—句子成分转换 NEW WORDS recognition [rek?g‘ni∫(?)n]n.承认，赏识，赞誉 modify [‘m?difai]v.更改，修改 stratification [?str?tifi‘kei∫?n]n.成层，分层 cutback [‘k?tb?k]n.减少 scope [skoup]n.范围，领域，见识，示波器，指示器 simultaneous [sim?l‘teinj?s]a.同时的，同时发生的，同步的 coast [koust]v.滑行，滑翔，沿海岸航行；n.海岸，沿岸 cut-off [‘k?t?f]n.切断，关闭，停车 coastdown [‘koustdaun]n.降低，下降，滑行 blank [bl??k]ad.空白的，空着的，没有表情的；n.空白 stall [st?:l]v.失速，熄火，（速度不够）停车[停止转动] refinement [ri‘fainm?nt]n.精致，文雅，精巧 resume [rizju:m]v.恢复, 重新开始 To prevent flooding, fuel quantity will cut back after a measured number of revolutions, or after the engine has reached a cranking rpm that is temperature related, for example 200-300 rpm. Start Control, Ignition Timing With a cold engine at low cranking speeds, timing will be controlled near TDC. For normal cranking rpm, a large advance in timing might fire too early, damaging the starter. Further, starting would be difficult if not impossible. With a cold engine at higher cranking rpm, however, timing will be advanced for better starting. For hot starts, or high intake air temperatures, timing will be retarded because a hot cylinder can fire easier while the piston is rising at cranking rpm. Retarded timing prevents knocking that can occur in high-compression engines, and may be masked by the starter sound. Start Control, Air As in L-Jetronic, the idle-speed stabilizer is normally driven open more by increased dwell signals to provide extra bypass air for cold starting. Post-Start Post-start-the 5-30 seconds when you want the engine to keep running after you release