Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. The prechamber is carefully designed to ensure adequate mixing of the atomized fuel with the compression-heated air. ...

What is pre combustion chamber?

: an auxiliary space in which combustible gases are ignited and combustion started ahead of the main combustion chamber of a jet or gas engine The glow plug is an electrically operated device that protrudes into the precombustion chamber.

What is the advantage of IDI engine?

The advantages of the indirect injection (IDI) engine are its quieter combustion and a combustion system that is more amenable to high speed operation. The disadvantage of the IDI engine, is that the direct injection (DI) engine has a 10–15% lower fuel consumption.