论文部分内容阅读
由燃烧过程的试验得知,汽油机在强烈爆震下工作时有以下三个特征:挤气间隙内产产生高频(750 kHz)压力波;各个工作循环的压力波动幅度很大;燃烧室壁温升高.爆震损坏只发生在距火花塞较远的缝隙(如挤气间隙)中,特别对硅铝合金零件(如活塞)有害.爆震损坏的程度和爆震强度、爆震工作持续时间及发动机转速有关.爆震损坏的影响表明,爆震损坏与高频压力波有关,但其内在关系目前尚不十分清楚.根据爆震损坏的特点和发生部位可以推测,爆震时燃烧室中出现冲击波,但至今尚不能用测量的方法来证实这一点.
According to the combustion process test, the gasoline engine has the following three characteristics when operating under severe knocking: a high frequency (750 kHz) pressure wave is generated in the squeeze gap; the pressure fluctuates greatly in each working cycle; the wall of the combustion chamber The temperature rise is high, the detonation damage occurs only in the gap far away from the spark plug (such as the squeeze gap), especially harmful to the silicon aluminum alloy parts (such as the piston). The degree of detonation damage and detonation strength, the detonation work lasts Time and engine speed.The impact of detonation damage shows that the detonation damage and high frequency pressure wave, but its internal relationship is not yet very clear.According to the characteristics of detonation damage and the occurrence of the site can be speculated that the detonation of the combustion chamber In the shock wave, but so far can not measure the method to confirm this.