| 摘要 |
<p>An electronic control system controls pilot fuel injection quantity and timing to optimize primary fuel charge ignition. The system includes sensors (76, 80, 84, 86, 88, 90, 92) monitoring engine operating conditions such as engine speed, power demand, intake air temperature, intake manifold pressure, knock, exhaust EGO concentration levels, fuel quality, etc., and a controller (56) which is responsive to these sensors to actuate an electronically controlled pilot fuel injector (32) to adjust pilot fuel injection timing and quantity as required for optimum primary charge ignition. The pilot fuel injector (32) is preferably controlled such that pilot injection quantity is ordinarily increased with increases in air/fuel ratio and charge density and with decreases in engine speed and such that injection timing is ordinarily advanced with increases with engine speed and air/fuel ratio and with decreases in charge density. The controller (56) is usable with virtually any gaseous fuel supply device and with both mechanically and hydraulically actuated electronically controlled pilot fuel injectors operating both with and without a prechamber.</p> |
