Indirect Injection System. Indirect fuel injection diesel engines also known as idi utilize a pre combustion chamber which is where fuel rapidly mixes with air and autoignition occurs. Idi stands for indirect injection.
Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. All modern petrol injection systems use indirect injection. For the external mixture formation system that is sometimes called indirect injection typical of otto and wankel engines this article uses the term manifold injection.
Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber.
This technology is used for achieving higher engine speeds for diesel engines. A special pump sends the fuel under pressure from the fuel tank to the engine bay where still under pressure it is distributed individually to each cylinder. An indirect injection diesel engine delivers fuel into a chamber off the combustion chamber called a pre chamber or ante chamber where combustion begins and then spreads into the main combustion chamber assisted by turbulence created in the chamber. Depending on the particular system the fuel is fired into either the inlet manifold or the inlet port via an injector.
