The pre-combustion chamber is composed of two parts: the pre-combustion chamber and the main combustion chamber.
The pre-combustion chamber is in the cylinder head, which occupies 25-40% of the compression volume, and has one or several through holes communicating with the main combustion chamber.
Fuel is injected into the pre-combustion chamber, and part of the fuel is burned after ignition, and the unburned mixture is injected into the main combustion chamber at a high speed, and further mixed and burned with air. This kind of combustion chamber is suitable for small and medium power diesel engines.