Fuel pump
The fuel pump is installed inside the fuel tank, thus saving space and simplifying the fuel piping system.
The fuel pump consists of a DC motor, a centrifugal pump, a relief valve to protect the fuel line system, a check valve to maintain residual pressure in the line after the pump is stopped, an inlet port and an outlet port. If the flow of top beer is obstructed in the outlet port of the pump, the internal relief valve will open to allow fuel to flow to the inlet port.
The pump assembly consists of an impeller (driven by the motor), a pump body (which forms the pump chamber) and a pump cover.
Pressure regulator
The fuel pressure regulator maintains constant fuel pressure in the injectors. The pressure regulator spring chamber is connected to the intake manifold to constantly maintain the fuel pressure 2.55 kg/cm³ higher than the manifold pressure. When the difference between the fuel pressure and the intake manifold pressure exceeds 2.55 kg/cm², the diaphragm moves upward and excess fuel is fed back to the fuel tank through the return channel.
Injector (nozzle)
The injector is a fixed-stroke axial type device actuated by a solenoid and consists of a solenoid, plunger, needle valve and housing. When current is applied to the solenoid, the valve opens and fuel fills the injector and is injected into the area near the intake valve. Since the needle valve lift and fuel pressure are constant, the amount of fuel injected is determined by the injector opening time. 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 in series between the power supply and the injector. The injection timing, defined by the opening and closing intervals, must be very precise, since 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 injector current rise time when voltage is applied to its coil. The current in the coil is limited by a resistor installed in series between the power supply and the injector coil.
Main Relay
The main relay contains two separate relays in one housing. The relay is mounted opposite the left side of the instrument panel, above and behind the fuse box. The first relay is energized whenever the ignition is turned on. Power is supplied to the ECU, injectors and the second relay. The circuits of the second relay turn on power to the fuel pump. This relay is always energized for 2 seconds when the ignition key is turned to the "ON" position and is always energized when the engine is running.
(Article source on the website: «www.hondabook.ru»)