Direct And Indirect Injection System. The responses for direct is faster and there is latency in power delivery in indirect. All akroyd hot bulb engines and some diesel compression ignition engines use indirect injection.
Traditional indirect fuel injection systems pre mix the gasoline and air in a chamber just outside the cylinder called the intake manifold. Direct fuel injection is the two stroke injection system where a valve is missing and injection is through slits on the barrel. Indirect injection or idi is when the fuel injection is not directly injected into the combustion chamber.
Due to low injection pressure the injector is cheaper to produce.
With direct injection technology the main benefit is better fuel economy for most applications and a bit more power. Direct fuel injection is the two stroke injection system where a valve is missing and injection is through slits on the barrel. The responses for direct is faster and there is latency in power delivery in indirect. Instead fuel goes into a pre combustion chamber or an air cell to begin the process that then spreads into the main combustion.
