Advantages are low fuel consumption, high power, high compression ratio of 12, and power and torque increased by 10% compared with ordinary engines with the same displacement.
The disadvantage is that the components are complex and the price is usually expensive. The injection pressure is also further improved, which makes the fuel atomization more detailed, truly realizes the accurate proportional control of fuel injection and intake air mixing, and eliminates the shortcomings of out-of-cylinder injection.
At the same time, the special design of nozzle position, spray shape, intake flow control and piston top shape makes the oil and gas fully and evenly mixed in the whole cylinder, so that the fuel can be fully burned and the energy conversion efficiency is higher.
So some people think that in-cylinder direct injection gasoline engine is a pioneering work of transplanting the form of diesel engine to gasoline engine.
Extended data:
Control of carbon deposition in in-cylinder direct injection engine;
In-cylinder direct injection engine is not superior to intake manifold injection engine in any respect, such as the control of carbon deposition.
When the intake manifold is used for injection, gasoline is injected on the back of the intake valve. Gasoline can clean the carbon deposit on the back of the valve because of its cleaning ability, but direct injection in the cylinder completely loses this function.
Therefore, after a long time, more and more carbon will be deposited in the air intake and valve, which will seriously affect the judgment of the engine control unit on the air intake, and even jam the valve, leading to failure.
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