The air entering the engine cylinders is cleaned of dust by the air filter. Air filter is installed in the engine compartment on three rubber supports. The filter element of the filter is replaceable, 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. Cleaned air through the MAF (mass air flow sensor) (for more details see. "Engine management system - device, repair, diagram") passes through the air duct to the throttle valve.
Throttle valve regulates the amount of air entering the engine cylinders. The throttle valve drive from the gas pedal is cable-operated. The throttle valve rotates on an axis in the housing (pipe). The throttle valve housing is secured to the flange of the intake module on studs. A channel for coolant is made in the housing. The channel is connected to the cooling system by rubber hoses. Circulation of coolant through the throttle valve housing prevents freezing of the internal air cavities of the housing in winter. The housing has fittings for connection to the adsorber and the engine crankcase ventilation system.
Throttle body with TPS installed on it (throttle position sensor) and IAC (idle speed control) (for more details see. "Engine management system - device, repair, diagram"), form throttle assembly.
The fuel supply is stored in a 43-liter fuel tank. Fuel tank — steel, welded from two stamped parts. The fuel tank is suspended from the bottom of the car on two steel clamps. The filler neck of the fuel tank is brought out to the right side of the car and closed with a plug. Fuel from the fuel tank is supplied by an electric fuel pump submersible type.
The fuel pump is installed in the fuel tank. To access the fuel pump, a hatch with a cover is made in the bottom of the car under the rear seat cushions.
The fuel pump inlet pipe is equipped with a mesh filter that traps small solid particles of debris that enter the fuel tank along with gasoline. Voltage is supplied to the pump by the ECU command (see "Engine management system - device, repair, diagram") 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.
Throttle assembly: 1 - throttle actuator sector; 2, 4 - nipples for connection to the engine cooling system; 3 - crankcase gas outlet fitting; 5 - throttle position sensor; 6 - idle speed controller; 7 - nipple for connection to the adsorber; 8 - throttle valve; 9 - throttle body pipe
Fuel pump: 1 - protrusion for fastening the mesh filter; 2 - fuel intake pipe for connecting a mesh filter; 3 - body; 4 - connector; 5 - day off (forcing) branch pipe for connection to the fuel module cover with a corrugated tube
Note. On a car with an MP7.0 type ECU, during the first attempt to start the engine after connecting the battery, the fuel pump can only be turned on simultaneously with the starter. Subsequently, the fuel pump will operate as on cars with other types of ECUs. However, after three consecutive ignition ons without starting the engine, the fuel pump will only be turned on simultaneously with the starter.
From the fuel pump, gasoline flows through the corrugated tube of the fuel module (see below) into the fuel line and then into the fuel filter, where the fuel undergoes more thorough cleaning.
Fuel filter - paper, installed in a non-separable metal case.
The purified fuel enters the fuel rail through the fuel line.
The text is taken from the online resource: VAZBOOK.RU
Fuel filter for VAZ 21124 engine (l,6i): 1 - inlet pipe; 2 - body; 3 - fuel flow direction arrow (painted on the filter body); 4 - outlet pipe
Note: The fuel filter of the VAZ 2112 (1.5i) engine has threaded connecting pipes.
Fuel rail holds four injectors and supplies fuel to them. The connection of the fuel rail with the injectors is sealed with rubber rings. The fuel rail is secured to the cylinder head with bolts.
Fuel pressure regulator - a bypass valve that maintains pressure in the system (fuel line) operating pressure 284-325 kPa for the 2112 engine or 378-390 kPa for the VAZ 21124 engine, necessary for the correct operation of the injection system (for more details, see. "Engine management system - device, repair, diagram").
In accordance with the environmental requirements of EURO II, the car is equipped fuel vapor recovery system, the fuel tank's fuel space is not directly connected to the atmosphere, but through the elements of this system. The gasoline vapor recovery system consists of a separator, a gravity valve adsorber, an adsorber purge valve, a check valve, connecting tubes and hoses. The separator and gravity valve are mounted under the left rear wing of the vehicle. In the separator, gasoline vapors are partially condensed and returned to the fuel tank. The gravity valve prevents fuel from leaking out of the fuel tank when the vehicle is turned over.
From the separator, uncondensed gasoline vapors are fed through pipes and connecting hoses to the adsorber, which prevents the vapors from entering the atmosphere. The adsorber is a container where gasoline vapors are absorbed by activated carbon. When the engine is running at high crankshaft speed, the ECU signals the adsorber purge valve to open, and gasoline vapors are sucked into the receiver of the intake module.
Air is supplied to the intake valves of the VAZ 2112 (l,5i) engine cylinders through receiver and intake manifold. These elements of the intake tract are connected to each other by rubber couplings.
Fuel pump combined with the fuel level indicator sensor into a single unit - a fuel module (often called an electric fuel pump). The fuel pump delivers fuel under pressure from the gas tank through the fuel filter to the fuel rail.
Fuel pressure regulator is installed on the fuel rail. Excess fuel is returned to the gas tank via the fuel drain line.
Location of the separator on a car with a VAZ 21124 engine (l,6i): 1 - separator; 2 - separator mounting bracket; 3 - gravity valve
Note. On a car with a VAZ 2112 engine, a safety valve is additionally installed here. On a car with a VAZ 21124 engine, the safety valve is located in the filler neck plug.
Adsorber: 1 - adsorber body; 2 - branch pipe for connecting the internal cavity of the adsorber with the atmosphere; 3 - purge valve of the adsorber; 4 - valve connecting pipe; 5 - adsorber connecting pipe
Fuel module of the VAZ 2112 engine (1.5i): 1 - fuel level indicator sensor; 2 - connecting connector; 3 - inlet pipe; 4 - day off (forcing) pipe branch; 5 - module cover; 6 - module cover guide; 7 - electric fuel pump in a plastic casing; 8 - intake chamber
Fuel rail of VAZ 2112 engine (l,5i) complete with injectors: 1 - fuel supply pipe to the fuel rail; 2 - fuel drain pipe into the tank; 3, 4, 5 and 6 - injectors; 7 - diagnostic connector (for checking fuel pressure, closed with a threaded cap); 8 - fuel rail; 9 - fuel pressure regulator
Intake module of the VAZ 21124 engine (l,6i): 1 - flange with sealing ring for fastening the throttle pipe; 2 - receiver; 3 - intake manifold flange with sealing rings for connections to the cylinder head
Air is supplied to the intake valves of the engine cylinders through the intake module.
Intake module the VAZ 21124 engine is made of special plastic and is a non-separable element.
Fuel module of the VAZ 21124 engine (l,6i): 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
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 gas tank (this eliminates the occurrence of a strong vacuum in the tank).
Fuel pump combined with the fuel level indicator sensor and fuel pressure regulator into a single unit - fuel module (often called an electric fuel pump).
Fuel pressure regulator for VAZ 21124 engine (l,6i): 1 - hole for draining excess fuel; 2, 4 - sealing rings; 3 - holes for supplying fuel to the regulator; 5 - body; 6-output for connecting the regulator to the "ground"
On a car with a VAZ 21124 engine (l,6i) 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 to the fuel rail. Excess fuel is released through the pressure regulator into the gas tank. The fuel pressure regulator is installed in the fuel module cover.
Fuel rail of VAZ 21124 engine (l,6i) complete with injectors: 1 - nipple for connection to the fuel line; 2 - fuel rail; 3 - diagnostic connector (for checking the working pressure, closed with a threaded cap); 4, 5, 6 and 7 - injectors
Features of the power supply system of the VAZ 2112 engine (1.5i)
Scheme of the power supply system of the engine VAZ 2112 (l,5i): 1 - injectors; 2 - fuel rail; 3 - diagnostic connector of the fuel rail (for checking fuel pressure, closed with a threaded cap); 4 - adsorber; 5 - check valve; 6 - throttle assembly; 7 - gravity valve; 8 - safety valve; 9 - separator; 10 - filler pipe; 11 - fuel filter; 12 - fuel supply line; 13 - fuel line hose connecting the outlet pipe of the fuel module with the fuel filter; 14 - fuel module; 15 - fuel tank; 16 - fuel drain line; 17 - fuel pressure regulator
Location of elements of the engine fuel system* VAZ 2112 (l,5i) in the engine compartment: 1 - receiver; 2 - throttle assembly; 3 - air supply hose to the throttle valve; 4 - air filter; 5 - fuel pressure regulator; 6 - throttle cable; 7 - fuel rail; 8 - diagnostic connector; 9 - adsorber check valve; 10 - adsorber
* VAZ 2112 engine (1.5i) with removed decorative trim.
Features of the power supply system of the VAZ 21124 engine (l, 6i)
Location of elements of the engine power supply system* VAZ 21124 (l,6i) in the engine compartment: 1 - intake module; 2 - throttle assembly; 3 - air supply hose to the throttle valve; 4 - air intake; 5 - air filter; 6 - fuel rail; 7 - throttle cable; 8 - fuel rail nipple; 9 - adsorber check valve; 10 - adsorber
* Engine VAZ 21124 (l,6i) with removed plastic cover.
Power supply system diagram of the VAZ 21124 engine (1.6i): 1 - injectors; 2 - fuel rail; 3 - diagnostic connector of the fuel rail (for checking fuel pressure, closed with a threaded cap); 4 - adsorber; 5 - check valve; 6 - throttle assembly; 7 - gravity valve; 8 - separator; 9 - fuel line tube connecting the fuel filter to the tee; 10 - fuel line tube connecting the fuel filter to the outlet pipe of the fuel module; 11 - fuel module; 12 - fuel filter; 13 - filler pipe; 14 - fuel tank; 15 - hose connecting the fuel filter and fuel module with the fuel line; 16, 18 - metal fuel line tubes; 17 - connecting hose; 19 - nipple for connecting the fuel rail to the fuel line