The main difference between the in-cylinder injection gasoline engine with the gasoline engines in that the position of the fuel injection, fuel injection system is electronically controlled fuel injection gasoline engine on an ordinary used, gasoline is injected into the intake manifold or intake conduit on a mixed gas is mixed with air before entering the combustion chamber through an intake valve of a cylinder is ignited for power; and the in-cylinder direct injection gasoline engine suggests that it is a gasoline injection in the cylinder, it is mounted in the injector combustion chamber, the gasoline direct injection combustion chamber in the cylinder, air is mixed into the combustion chamber through an intake valve with a mixed gas is ignited for power, this form is similar to the direct injection diesel engine, and it was felt in-cylinder direct injection gasoline engine It is transplanted in the form of a diesel engine to one kind of initiative on gasoline.
1. Direct Injection noun
The main difference between the in-cylinder injection gasoline engine with the injection of gasoline fuel injection engine wherein the position of the ordinary gasoline engine used EFI gasoline electronically controlled injection system, the petrol is injected into the intake manifold or the inlet line, a mixed gas is mixed with air and then through the intake valve into the cylinder combustion chamber is ignited for power; and the in-cylinder direct injection gasoline engine name suggests YesIn the cylinder injection gasoline, it nozzle mounted in the combustion chamber, the cylinder gasoline direct injection in the combustion chamber, the air is mixed into the combustion chamber through an intake valve to mix with gasoline is ignited for power, this form and similar direct injection diesel engine, and it was felt in-cylinder direct injection gasoline engine is a diesel engine to form one kind of transplant initiative on gasoline.
2. Advantage of direct injection of
advantages
of in-cylinder direct injection gasoline engine is low fuel consumption, high power rise.
air-fuel ratio to reach 40: 1 (air-fuel ratio of gasoline engine is 15: 1), which is known as “the lean.” In the
machine half spherical piston head, a wall surface of the other half, after the air is rushed from the valve form one swirling motion of the piston under compression, when the compression stroke is about to end, the top of the combustion spray start injection nozzle, a mixed gas of gasoline and air to form a swirling motion under the effect of this hybrid rapidly rotating gas is hierarchical, more concentrated closer to the spark plug, ignition is easy to do work.
a compression ratio up to 12, compared with the general engine of the same displacement power and torque are increased by 10 percentage.
3. The extensive use of direct injection of
In recent engine technology used in the plant, the hottest technology is none other than non-direct injection. This diesel engine derived from the technology is now widely used in containing VAG, BMW, Mercedes-Benz, GM and Toyota (Lexus) on cars.
injection technology is widely used in the VAG Group, shared by Audi RS4 and R8 4.2 liter FSI engine that is one representative powerful performance.
which can be regarded as an example of VAG Group imported the most representative direct injection technology, now includes the Audi and VW have called FSI direct injection engine’s power as a higher order of cars origin, but also in the Audi and VW cars top car, and even more in order to combine FSI turbocharged to increase the power.
fuel supply system using the maximum advantage of direct injection design lies in extremely high pressure fuel is directly injected into the combustion chamber, so in addition to the nozzle configuration and location are different from the traditional supply system in the oil and gas atomization and mixing efficiency and more excellent. Coupled with the recent technical control of the vehicle electronic systems significantly advances the computer for interpretation and controlling the intake air and fuel injection timing has become even more accurate, so with the direct injection technology to enable engine combustion efficiency increased dramatically under in addition to the engine to produce more power, but also for environmental protection and energy conservation have a positive help.
However, direct injection technology is not invincible, because from an economic perspective, the use of direct injection of the fuel supply system in addition to have to spend a greater cost in the development process, parts in a complex and delicate situation , the price components also is more expensive than conventional oil supply system, so these are also future-cylinder direct injection engine to be overcome elements.
