Fuel pump
The fuel pump is installed inside the fuel tank, thus saving space and simplifying the fuel line system.
The fuel pump consists of a DC motor, a centrifugal pump, a safety valve to protect the fuel line system, a control valve to maintain the residual pressure in the pipeline after the pump is stopped, inlet and outlet ports. If the flow of top beer is obstructed at the pump outlet, the internal relief valve will open to allow fuel to flow to the inlet port.
The pump assembly consists of an impeller (driven by engine), pump housing (which forms the pumping chamber) and pump covers.
Pressure regulator
The fuel pressure regulator maintains a constant fuel pressure in the injectors. The pressure regulator spring chamber is connected to the intake manifold to keep the fuel pressure 2.55kg/cm3 higher than the manifold pressure at all times. When the difference between fuel pressure and intake manifold pressure exceeds 2.55 kg/cm2, the diaphragm moves up and excess fuel is fed back to the fuel tank through the return port.
Injector (nozzle)
Injector (nozzle) is a fixed stroke axial type device actuated by a solenoid and consists of a solenoid, a plunger, a needle valve and a casing. When the solenoid is energized, the valve opens and fuel fills the injector and is injected into the area next to the intake valve. Due to the fact that the height of the needle valve and the fuel pressure are constant, the amount of fuel injected is determined by the opening time of the injector. The injector is sealed with O-rings at the top and bottom. These seals also reduce system noise.
Resistor
All fuel injected engines have a resistor connected in series between the power supply and the injector. The injection time sequence, given by the opening and closing intervals, must be very accurate, as it determines the composition of the air-fuel mixture. The injector must also be reliable. For the best injector response, it is necessary to reduce the rise time of the current in the injector when voltage is applied to its coil. The coil current is limited by a resistor in series between the power supply and the injection coil.
Main Relay
The main relay contains two separate relays in one housing. The relay is located opposite the left side of the dashboard, above and behind the fuse box. The first relay - turns on every time the ignition is turned on. Power is supplied to the ECU, injectors and the second relay. The second relay circuits include power to the fuel pump. This relay always energizes for 2 seconds when the ignition key is turned to "ON" (included) and always on when the engine is running.