operation of the engine needs to work combustion of the mixture, and the air-fuel mixture into the engine oil is the manner mode.
1. Noun interpretation fuel supply means
operation of the engine needs to work combustion of the mixture, and the fuel and air into the engine oil is mixed mode manner.
automotive engine fuel supply mode is divided into the carburetor, EFI single point, multi-point fuel injection and direct injection.
2. Carburetor substantially description
carburetor engine under the action of vacuum generated by mechanical means a proportion of the fuel mixed with air, the fuel supply mode is conventional gasoline engines have been widely used. But often resulting in incomplete combustion engines are often in a state of harmful substances in exhaust emissions can not meet the increasingly stringent emissions regulations, and it will result in higher fuel consumption, it is now gradually being eliminated out.
3. The single-point fuel injection
means that only one nozzle is responsible for each cylinder fuel injection nozzle into the intake pipe is not located before the intake manifold on which the fuel injection amount according to the size of the size of the accelerator. Since the intake manifold of different lengths, Location distance, so the amount injected into each cylinder and the mixing time does not match the oil, thereby causing each of the cylinders are different working conditions. It has a simple structure and lower cost.
4. The multi-point fuel injection
mounted on the injector intake manifold of each cylinder, fuel is injected by a plurality of places (for each cylinder has at least one injection point) injected into the cylinder. Air-fuel ratio control more accurate than a single point of injection, can be according to the timing of fuel injection, fuel injection quantity, injection timing precisely controlled, multi-point injection engine emissions better and more economical fuel.
5. Injection Introduction
The nozzle means is disposed between the intake and exhaust valves, the high pressure fuel directly into the combustion chamber smoothly and efficiently combustion. Advantage of direct injection at low load when it is reflected, at low loads, only the discharge nozzle surrounding the minimum amount of oil is concentrated in the spark plug, the other portion of the inner cylinder is air. When the combustion air heat out layer will be isolated, it is possible to reduce heat transfer to the cylinder walls, thereby reducing the heat loss, thereby improving the thermal efficiency of the engine.
6. mixing and spray lubrication method
The conventional engine fuel system, either manifold injection, either direct injection, but regardless of which have their disadvantages. To address rely solely on the direct injection engine technology exists emissions, carbon and other issues, to meet increasingly stringent environmental regulations, jet engine hybrid technology came into being. Mixing means for injecting fuel injection system and a direct injection system of the injection manifold injector combination, taking the advantages of both, and weaken the two weaknesses. Not only can improve efficiency of the engine, a direct injection engine is also avoided in the low load operation because of emission problems caused by an excess of oxygen.
face of increasingly stringent emissions regulations, the direct injection engine is somewhat overwhelming. Thus researchers thought of manifold injector, and to it was added to the direct injection into the engine, the injection system form a set of hybrid.
at low load conditions, when the manifold injector cylinder intake stroke injection, the mixed gas into the cylinder, together with the cylinder during the compression stroke injector nozzle, in order to achieve stratified combustion; high load conditions, direct injection only during the compression stroke. Thus, not only can improve efficiency of the engine, but also to avoid the above-mentioned low load conditions due to emissions caused by an excess of oxygen.
Function
embodiment of the mixing and spray combines the advantages intended manifold injector and in-cylinder direct injection technology to solve the problem of the conventional direct injection technology. Due to the involvement of manifold injection, direct injection engine helps slow down the tradition and the intake valve on the inlet more carbon phenomena.