柴油机着火敲击声发生在滞燃期终了时，由于燃烧室内积聚燃料过多，点火时燃气压力上升过于剧烈，造成活塞与气缸壁以及曲柄连杆机构和相对运动零部件之间产生冲击，而发出的一种异常的金属敲击声。高速运转时的着火敲击声比较尖锐、清脆；在怠速与中速之间无负荷运转时，是连? Diesel ignition percussion occurred at the end of the flammable period, due to excessive accumulation of fuel in the combustion chamber, the ignition gas pressure rises too violently, resulting in piston and cylinder wall and crank linkages and the relative movement between the components of the impact, An unusual metal percussion sound is emitted. High-speed operation of the fire percussion more sharp, crisp; idle and medium-speed operation at no load, even?