engine knock

1. 1.

   a rattling, pinging, or tapping sound caused by improper combustion, where the air-fuel mixture ignites spontaneously in the cylinders before the spark plug fires, or in multiple spots simultaneously

   一种由燃烧不当引起的咔嗒声、爆震声或敲击声,即空气燃料混合物在火花塞点火前自燃或同时在多处自燃。

爆声