The injector is an independent fuel supply system. The fundamental difference from the carburetor is the supply and the fuel mixture itself. In the injector, fuel is supplied through the injectors separately to each cylinder, under high pressure, the very mixture of gasoline with oxygen occurs in the cylinder. In the carburetor, the mixture takes place in the intake manifold. The injector is more economical and environmentally friendly than the carburetor.
Instructions
Step 1
The injector consists of many parts of assemblies and mechanisms, both electronic and mechanical. The main parts are injectors, fuel rail (rail), intake manifold, throttle valve. They are responsible for supplying fuel. Throttle potentiometer (flow meter) ECU (electronic control unit), idle solenoid valve. Responsible for feeding the mixture. Catalytic converter (part of the muffler), oxygen sensor (lambda probe)
Step 2
Each part of the injector is responsible for a specific stage in the supply and mixture of fuel. So, for example, pressing the accelerator (gas) pedal triggers the opening of the electronic throttle valve, which in turn communicates with the throttle valve potentiometer. Having received a signal from the throttle valve, the potentiometer opens the air supply flap to the required angle. Having received signals from two sensors, the ECU calculates the required amount of fuel that must pass through the injectors. Once in the cylinder, the fuel mixes with oxygen, forming a rich mixture, which ignites in the engine. After the combustion of the mixture, exhaust gases come out of the engine. A catalytic converter is installed in the exhaust system, which is coupled with a lambda probe, which is responsible for feedback, which reads the oxygen content in the exhaust gases. Based on the signals from the oxygen sensor, the ECU adjusts the fuel supply to the engine, precisely maintaining the desired mixture composition
Step 3
In the event of any malfunction, only competent diagnostics of the injection system will help, which can be done at any car repair station. But there are moments that do not require the intervention of a qualified master.
Step 4
You can replace the injectors on your own, for this you need to de-energize the car, disconnect all fuel supply hoses. Remove the throttle valve with the air duct going to it. Next, unscrew the screws securing the ramp to the intake manifold. Then carefully remove the injectors without damaging the O-rings. Collect in reverse order
Step 5
You can clean the intake manifold and the throttle valve, for this it is better to use a special compound that is sold in auto chemistry stores (the price of the composition is from 80 to 150 rubles)
Step 6
It is possible to replace the catalytic converter (only if it is completely clogged). Replacing the lambda probe. Disconnect the lambda probe from the supply and data wires and then unscrew it from the catalytic converter.
