Electronic Fuel Injection Systems

You may think why it is necessary to use fuel injection system as your vehicle is already using carburetor. Yes, you are right. This part is necessary to control the air-fuel mixture richness in various operating conditions. At the very beginning of your engine’s start up, it requires a very rich mixture to make it heated up. Here, the rich mixture contains high fuel percentage than air. Again it also requires a very high rich mixture when you accelerate and increase the speed. Practically, your gasoline engine uses any one of the following fuel injection systems:

a. TBI (Throttle Body Injection) system

b. PFI (Port Fuel Injection) system

 In case of any one of the following fuel injection system, your engine requires an electric pump to supply fuel into your engine at high pressure. You will also find a solenoid valve in this system, which controls the flow of fuel. It also aids to open and close the valve. You will also find an electronic control module on your car, which actually controls the fuel injection system. Various components of your fuel system send signals directly to the electronic control module (ECM), which calculates fuel requirements. Various components of your electronic fuel injection system are as follows:

a. Electronic Control Module

b. Relay Controller

c. Cannister Purge Valve

d. Fuel Pump Inertia Switch

e. Manifold Absolute Pressure Sensor

f. EGR Vacuum Regulator Valve

g. Pressure Feedback EGR Valve

h. Ignition Pickup Sensor

i. Throttle Position Sensor

j. Oxygen Sensor

k. Air-Charge Temperature Sensor