Location of engine fuel system components in the engine compartment: 1 - intake manifold receiver; 2 - throttle assembly with electric throttle drive; 3 - air supply hose to the throttle valve; 4 - air filter; 5 - air duct.
The fuel system consists of a fuel tank, fuel module, fuel filter, fuel rail with injectors, air filter, fuel lines, air ducts, throttle assembly, intake manifold. as well as gasoline vapor recovery systems.
The air entering the engine cylinders is cleaned of dust by the air filter. The air filter is installed in the engine compartment on three rubber supports. The filter element is replaceable and made of special paper. To prevent contaminated air from being sucked into the intake tract, there is a sealing edging at the top of the element. To replace the filter element, the filter cover is removable. The purified air passes through the mass air flow sensor through the air duct to the throttle valve.
The electric throttle valve regulates the amount of air entering the engine cylinders. The valve rotates on an axis in the housing (pipe). The throttle valve housing is secured to the intake manifold receiver flange with four bolts (for more details, see. "Engine management system"). The receiver has pipes for connection to the adsorber and the engine crankcase ventilation system.
The housing with the throttle valve with the position sensor and electric actuator installed on it form the throttle assembly.
The fuel supply is stored in a 50-liter tank. The fuel tank is made of special plastic and is suspended from the bottom of the car on two steel clamps. The fuel tank filler neck is located on the right side of the vehicle and is closed with a plug. Fuel is supplied from the tank by a submersible electric fuel pump.
The pump is installed in the fuel tank. To access the pump, there is a hatch with a cover in the bottom of the car under the rear seat cushion.
A mesh filter is installed on the inlet pipe of the fuel pump, which traps small solid particles of debris that enter the fuel tank along with gasoline. Voltage is supplied to the pump by command from the ECU when the ignition is turned on. If no attempt is made to start the engine, then after 2-3 seconds the ECU will turn off the fuel pump.
Fuel pump: 1 - protrusion for fastening the mesh filter: 2 - fuel intake pipe for connecting the mesh filter; 3 - body; 4 - Electrical connector block; 5 - day off (forcing) branch pipe for connection to the fuel module cover with a corrugated tube.
The fuel pump is combined with the fuel level indicator sensor and the fuel pressure regulator into a single unit - the fuel module (often called an electric fuel pump).
Engine fuel module: 1 - inlet pipe (for supplying fuel to the pressure regulator); 2 - day off (forcing) pipe branch; 3 - module cover; 4 - fuel level indicator sensor; 5 - intake chamber; 6 - module cover guide.
Fuel from the pump (through the outlet pipe of the fuel module) enters the fuel filter. The purified gasoline is again fed through the fuel line and through the tee to the inlet pipe of the fuel module and then fed into the fuel rail. Excess fuel is released through the pressure regulator into the tank. The fuel pressure regulator is installed in the fuel module cover.
Engine Fuel Pressure Regulator: 1 - hole for draining excess fuel; 2, 4 - sealing rings; 3 - holes for supplying fuel to the regulator; 5 - body; 6 - terminal for connecting the regulator to ground.
The fuel pressure regulator is a bypass valve that maintains pressure in the system (fuel line) operating pressure 378-390 kPa, necessary for the correct operation of the injection system.
Main material on the website (LadaMan)
Fuel filter: 1 - inlet pipe; 2 - body; 3 - fuel flow direction arrow (painted on the filter body): 4 - outlet pipe.
The fuel filter is paper and is installed in a non-separable metal housing.
The purified fuel enters the fuel rail through the fuel line.
Fuel rail assembly with injectors: 1 - diagnostic nipple; 2 - fuel rail; 3 - nipple for connection to the fuel line; 4, 5, 6 and 7 - injectors.
The fuel rail holds four injectors and supplies fuel to them. The connection between the ramp and the injectors is sealed with rubber rings. The ramp is secured to the intake manifold with bolts.
In accordance with current environmental requirements, the vehicle is equipped with a fuel vapor recovery system; the space above the fuel tank is not directly connected to the atmosphere, but through elements of this system. The system consists of an adsorber, an adsorber purge valve, connecting tubes and hoses.
Gasoline vapors are fed through pipes and connecting hoses to the adsorber, which prevents the vapors from entering the atmosphere. An adsorber is a container where gasoline vapors are absorbed by activated carbon. When the engine is running at high crankshaft speed, the ECU sends a signal to open the purge valve of the adsorber, and gasoline vapors are sucked into the receiver of the intake manifold.
The adsorber is attached to the fuel tank at the front on the left side and is covered with a protective screen.
Air is supplied to the intake valves of the engine cylinders through the receiver and intake manifold.
The engine receiver is made of special plastic.
Receiver
The filler cap has two valves: one for emergency release of fuel vapor pressure from the tank (what is possible with an increase in ambient temperature), and the other one is for the intake of air from the atmosphere when fuel is consumed from the tank (this eliminates the occurrence of a strong vacuum in the buck).