At the beginning of 2004, about 1200 internationally renowned automotive propulsion system experts gathered in Vienna to discuss how to further reduce fuel consumption and thus reduce CO2 emissions.
Experts generally believe that gasoline direct injection technology and hybrid power are the most promising technologies in the future. At the same time, in recent years, Mitsubishi, Mercedes-Benz, BMW, Ford and other manufacturers.
It has also increased investment in scientific research in this field. On the basis of the research on the first generation GDI engines, brand-new second generation GDI engines have been launched one after another.
GDL engine has the following technological innovations:
1, vertical air intake, used to control the air flow in the cylinder;
2. The small spherical combustion chamber on the dome piston is used to control fuel mixing and fuel;
3. By precisely controlling the dispersion and micronization of injected fuel, a suitable mixed gas high-pressure swirl injector is formed.
GDL principle of extended data;
The main difference between in-cylinder injection gasoline engine and ordinary gasoline engine lies in the position of gasoline injection and the electronically controlled gasoline injection system used in ordinary gasoline engine at present.
Gasoline is injected into the intake manifold or intake pipe, mixed with air to form mixed gas, and then enters the combustion chamber of the cylinder through the intake valve and is ignited to do work.
In-cylinder injection gasoline engine, as its name implies, injects gasoline into the cylinder. It installs the fuel nozzle in the combustion chamber and directly injects gasoline into the combustion chamber of the cylinder.
Air enters the combustion chamber through the intake valve and is ignited to do work after being mixed with gasoline. This form is similar to direct injection diesel engine, so some people think that in-cylinder injection gasoline engine is a pioneering work of transplanting diesel engine form to gasoline engine.
GDL engine directly injects fuel into the cylinder, and uses the air flow in the cylinder and the atomization of fuel on the piston surface to achieve the purpose of combustion. GDL engine performs well in working uniformity and full load performance, and also significantly improves the instability of gasoline engine in cold car.
The main difference between GDL engine and ordinary gasoline engine lies in the position of gasoline injection. At present, the gasoline electronic control injection system used by general gasoline engines is to inject gasoline into the intake manifold or intake pipe, mix it with air, and then enter the cylinder combustion chamber through the intake valve to be ignited to do work.
Gasoline injection is to directly inject a certain amount and pressure of gasoline into the cylinder or intake manifold with an injector, and mix with the intake air to form a combustible mixture. Electronically controlled fuel injection systems are distinguished according to the type of injectors.
It can be divided into electronic gasoline injection and mechanical gasoline injection, and can be divided into single-point and multi-point according to the number and position of injectors. It has a series of sensors to receive various signals during engine operation.
And transmits them to an engine electronic control unit that controls the fuel injection of the fuel injector. Compared with carburetor, it greatly improves the control accuracy of fuel system.
Baidu encyclopedia -GDI