What is the difference between EFI and carburetor

Electric injection and carburetor refer to different ways of supplying fuel to the engine

Simply put, it is a different way of supplying fuel to the engine. EFI engines are more advanced than carburetor engines in that they are controlled by a computer system, which allows the engine to obtain an optimal mixture and produce maximum power output under various operating conditions. It makes the gasoline combustion more fully and thoroughly, can improve the engine output of about 5%, saving fuel 5% to 20%, can make the harmful gas emissions are effectively controlled. Therefore, in the world's developed countries, has long been strictly prohibited the manufacture and use of carburetor vehicles.

The traditional carburetor engine, although it can meet the vehicle under various working conditions of the fuel supply, but the control can not be accurate, not only caused by the waste of fuel, but also affect the composition of exhaust emissions. And the EFI device is precisely to play the role of automatic control of fuel and air mixing ratio. For the car in the start, idling, acceleration, braking and other different driving conditions, by the sensor and the computer to determine the appropriate amount of fuel injection, injection of the best moment, and can be timely and timely cut off the fuel supply, not only saves fuel consumption, but also from the adjustment of the combustible mixture of air-fuel ratio, fundamentally improve the tailpipe emissions.

As we all know, gasoline in the engine before entering the cylinder, need to be sprayed into a mist and evaporation, and according to a certain proportion of the air mixture, the formation of combustible mixture, this combustible mixture of fuel content of how much is known as the concentration of combustible mixture. Combustible mixture concentration should be able to make the mixture in the cylinder in a timely manner and complete combustion. Because the combustion is complete, the combustion of heat release is more, which not only can make the engine to send out more power, but also can make the exhaust gas in the control of harmful substances; combustion in time, can make the ratio of fuel consumption down, improve thermal efficiency.

So the quality of combustion, i.e., whether the combustion is complete and timely, is related to the content of CO, HC in the exhaust emissions and the degree of utilization of fuel combustion heat release. Secondly, as the combustion heat release is mainly limited by the cylinder charge, although the larger the charge, the greater the power and torque of the engine. The electronic fuel injection system is one such automotive electronic product that can improve the quality of gasoline atomization, improve combustion, control emissions and improve the performance of gasoline engines.

Compared with the traditional carburetor supply system, the electronic fuel injection system is to replace the carburetor with a fuel injection device, through microelectronic technology to implement multi-parameter control of the system, the engine power can be increased by 10 percent, in the case of the same amount of fuel consumption, the torque can be increased by 20 percent; fuel consumption by 10 percent; exhaust emissions can be reduced by 34 percent of 50 percent, the system adopts a closed-loop control and add a three-way catalytic converter, emissions can be increased by 10 percent. With closed-loop control and the addition of a three-way catalytic converter, emissions can be reduced by 73%. There are two types of electronic fuel injection systems: pressure EFI and atmospheric pressure EFI. Carburetor cars give priority to fuel supply and then gas distribution, such as gas line obstruction will cause incomplete combustion and serious exhaust gas pollution. EFI car priority gas distribution after the fuel supply, such as gas line blockage will appear in the car lack of power, pollution relative to the carburetor car to be much lower, but need to be immediately repaired and maintained.