Engine intake system 21129: 1 - inlet module; 2 - throttle assembly; 3 - air supply hose to the throttle valve; 4 - air filter; 5 - resonator (air intake muffler); 6 - solenoid valve of the system for changing the length of the inlet pipeline
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, an inlet pipeline, and a gasoline vapor recovery system.
The air entering the engine cylinders is cleaned of dust by an air filter. The air filter is installed in the engine compartment. 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 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). Throttle body fixed to intake manifold flange (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 fuel reserve is stored in a tank with a capacity of 55 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 no attempt is made to start the engine, then after 2-3 seconds the ECU will turn off the fuel pump.
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).
Fuel pump: 1 - protrusion for attaching a mesh filter; 2 - fuel intake pipe for connecting a 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
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 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 module: 1 - day off (forcing) pipe branch; 2 - module cover; 3 - fuel gauge sensor; 4 - intake chamber; 5 - module cover guide
The fuel pressure regulator is a bypass valve that maintains in the system (fuel line) working pressure 364-400 kPa, necessary for the correct operation of the injection system.
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»
Fuel filter - paper, installed in the fuel module.
The purified fuel enters the fuel rail through the fuel line.
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.
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
In accordance with the current environmental requirements, the car is equipped with a fuel vapor recovery system, the space above the fuel tank is connected with 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 under the front right krftm of the car.
The inlet pipeline and the receiver are combined into a single non-separable unit - the inlet module.
The intake module is equipped with a system for changing the length of the intake tract.
Depending on the engine operating mode, the ECU opens the solenoid valve, and the pneumatic drive 1 rotates the axle with dampers 2, switching the channels for the movement of incoming air. As a result, the ECU changes the length of the air path, adjusting it in an optimal way depending on the speed of the crankshaft.
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 the tank).