论文部分内容阅读
针对某型二冲程点燃式空气辅助缸内直喷发动机燃用柴油问题,提出了实现单电容连续多次放电点火的方法,研制了直流电容式多次放电点火模块,进行了多次点火功能性验证及点火能量测试.在此基础上,进行了环境温度为6℃下的冷起动试验及3000r/min小负荷性能试验,结果表明:在该环境条件下,采用5次放电点火策略能够使发动机起动成功,在小负荷工况下,增加点火次数有利于改善缸内燃烧,点火提前角在10°~20°之间时,4次点火对发动机动力性、燃油消耗率及排放性能改善比2次点火更明显,当点火提前角提前至30°后,其改善作用逐渐减小.
Aiming at the problem of burning diesel with a two-stroke ignition type air-assisted direct injection internal combustion engine, a method of realizing single-capacitor continuous multiple-discharge ignition is proposed. A direct-current capacitor type multiple-discharge ignition module is developed, and multiple ignition functionalities Verification and ignition energy test.On this basis, the cold start test at 6 ℃ and the test of 3000r / min small load were carried out. The results show that under this environmental condition, using 5 discharge ignition strategy can make the engine The start-up is successful. Under the condition of small load, increasing the number of ignition helps to improve the combustion in the cylinder. When the ignition advance angle is between 10 ° ~ 20 °, the ignition of 4 times improves the engine power, fuel consumption and emission performance ratio 2 Ignition more obvious, when the ignition advance to advance to 30 °, the improvement gradually reduced.