What kind of engine is the GDI?
While GDI GDI system is in cylinder injection gasoline, it will install the nozzle in the combustion chamber, the gasoline direct injection in the combustion chamber of the cylinder, the air enters the combustion chamber and gasoline mixed into the mixture is ignited by the power intake valve, similar to the form and direct injection the diesel engine, so some people think, GDI gasoline engine is a pioneering form transplanted to the gasoline engine diesel engine. The key of the injection in cylinder is to produce the air flow state in the cylinder which is different from that of the traditional engine. By means of technical means, the gasoline and air injected into the cylinder form a multi layer rotating vortex. Therefore, GDI uses vertical suction, curved top piston, high pressure rotary ejector and other three technical means. GDI uses a vertical intake manifold design, and a bulge shape is designed at the head of the piston. With this design, when the piston is in compression stroke, the cylinder will form a powerful vortex
The study of GDI engines started in Germany. As early as 50s, Germany had a direct injection, two stroke gasoline engine to load the city, and even to the famous SL class Mercedes Benz sedan, but soon disappeared. Later German designers, both Mercedes Benz, BMW, and Volkswagen, for gasoline direct injection will take the attitude of untrammelled frown. Because according to the test, they think this kind of engine running performance is poor, the car almost can not open, exhaust gas problems can not be solved, so they stopped the development of the GDI engine
The research and development of GDI engines can be described as flowers in Germany, but fruits in japan. The development of Mitsubishi Motor Co GDI engine to make the success of the world's car manufacturers and engine manufacturers to fall far behind, so the world car off a GDI engine developed by boom. Since then, the development of the gasoline engine has taken a new step, which will also promote the development of the world auto industry.
The GDI engine is characterized by the direct injection of fuel into the cylinder, the use of cylinder flow and the surface of the piston fuel atomization effect to achieve the purpose of burning. The GDI engine has excellent performance in both its work uniformity and its performance under full load, and has significantly improved the cold work instability of the gasoline engine. The main difference between the GDI engine and the general gasoline engine is the fuel injection position, injection system of electronic control gasoline used the general gasoline engine, gasoline is injected into the intake manifold or the intake pipe, and air to be mixed gas and then through the intake gas into the cylinder combustion chamber is ignited for power
