The location of the elements of the engine power system in the engine compartment: 1 - intake manifold receiver; 2 - throttle assembly with electric throttle; 3 - air supply hose to the throttle valve; 4 - air filter; 5 - air duct.
The power supply system consists of a fuel tank, a fuel module, a fuel filter, a fuel rail with injectors, an air filter, fuel lines, air ducts, a throttle assembly, and an intake pipeline. as well as gasoline vapor recovery systems.
The air entering the engine cylinders is cleaned of dust by an air filter. The air filter is mounted in the engine compartment on three rubber mounts. The filter element of the filter is replaceable, made of special paper. To prevent the ingress of polluted air into the intake tract, there is a sealing border at the top of the element. To replace the filter element, the filter cover is made removable. The purified air passes through the mass air flow sensor through the air duct to the throttle valve.
The electric throttle controls the amount of air entering the engine cylinders. The damper rotates on an axis in the housing (branch pipe). The throttle body is secured to the intake manifold flange with four bolts (see more details. «Engine management system»). The receiver has branch pipes for connection with the adsorber and the engine crankcase ventilation system.
A housing with a throttle valve with a position sensor and a damper motor installed on it form a throttle assembly.
The stock of fuel is stored in a tank with a capacity of 50 liters. The fuel tank is made of special plastic and suspended from the bottom of the car on two steel clamps. The filler neck of the fuel tank is displayed on the right side of the car and is closed with a stopper. Fuel from the tank is supplied by an electric submersible fuel pump.
The pump is installed in the fuel tank. To access the pump in the bottom of the car, under the rear seat cushion, a hatch with a cover is made.
A strainer is installed on the fuel pump inlet pipe to trap small solid particles of debris that have entered the fuel tank along with gasoline. The pump is energized by the ECU when the ignition is turned on. If at the same time an attempt is not made to start the engine, then after 2-3 seconds the ECU will turn off the fuel pump.
Fuel pump: 1 - protrusion for attaching the strainer: 2 - fuel intake pipe for connecting the strainer; 3 - body; 4 - electrical connector block; 5 - day off (forcing) branch pipe for connection with the cover of the fuel module 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 referred to as 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 gauge sensor; 5 - intake chamber; 6 - module cover guide.
Fuel from the pump (through the fuel module outlet) 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 it will be fed into the fuel rail. Excess fuel is bled through the pressure regulator into the tank. The fuel pressure regulator is located in the fuel module cover.
Engine fuel pressure regulator: 1 - hole for dumping excess fuel; 2, 4 - sealing rings; 3 - holes for supplying fuel to the regulator; 5 - body; 6 - output for connecting the regulator with «weight».
The fuel pressure regulator is a bypass valve that maintains in the system (fuel line) working pressure 378-390 kPa, necessary for the correct operation of the injection system.
Fuel filter: 1 - inlet pipe; 2 - body; 3 - fuel flow direction arrow (painted on the filter body): 4 - outlet pipe.
Fuel filter - paper, installed in a metal non-separable housing.
The purified fuel enters the fuel rail through the fuel line.
Fuel rail assembly with injectors: 1 - diagnostic fitting; 2 - fuel rail; 3 - fitting for connection with the fuel line; 4, 5, 6 and 7 - nozzles.
The fuel rail holds the four injectors and delivers fuel to them. The connection of the ramp with the nozzles is sealed with rubber rings. The ramp is bolted to the intake manifold.
In accordance with current environmental requirements, the car is equipped with a fuel vapor recovery system, the fuel space of the tank is connected to the atmosphere not directly, but through the elements of this system. The system consists of an adsorber, an adsorber purge valve, connecting pipes and hoses.
Vapors of gasoline through pipes and connecting hoses enter the adsorber, which prevents vapors from entering the atmosphere. An adsorber is a container where gasoline vapors are absorbed by activated carbon. When the engine is running at a high crankshaft speed, the ECU sends a signal to open the canister purge valve, and gasoline vapors are sucked into the intake manifold receiver.
The adsorber is fixed on the fuel tank in front on the left side and is closed by a protective screen.
Air is supplied to the inlet valves of the engine cylinders through the receiver and the inlet pipeline.
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 happens when the ambient temperature rises), and the other - for the intake of air from the atmosphere when fuel is consumed from the tank (this eliminates the occurrence of a strong vacuum in bucks).