论文部分内容阅读
The objective of this investigation is to compare the transient firing behavior of a spark-ignition engine fueled with methanol，LPG and methanol/LPG respectively during cold start by means of cycle-by-cycle control strategy. The ambient temperature affects methanol engine reliable cold start the most significantly，the amount of methanol injected per cycle takes the second place. When the ambient temperature is below 16℃，the methanol engine can not be started reliably without auxiliary start-aids even at a large amount of methanol injected per cycle under low injection pressure. The amount of fuel injected per cycle affects LPG and methanol/LPG engine cold start reliability significantly. A proper amount of fuel injected per cycle can assure reliable start of LPG and methanol/LPG engine. If the injection timings of methanol and LPG are controlled reasonably at cold start，methanol and methanol/LPG engine may realize the ideal next cycle firing after fuel injection.