The fuel tank is vented through a closed air removal system. Fuel vapors are captured by an activated carbon canister - an adsorber.
The fuel system is constantly under pressure, even after the engine has been switched off, so any work on the fuel system must be relieved of pressure.
The fuel supply circuit includes:
- fuel distribution line;
- fuel vapor absorber;
- fuel filter;
- fuel return pipeline;
- fuel supply pipeline 2;
- ring type valve;
- nozzles;
- pipeline for supplying fuel vapor to the engine;
- fuel pressure control;
- fuel pump immersed in the fuel tank.
There is no fuel return circuit in the fuel distribution line.
The fuel pressure regulator is built into the fuel pump/sensor module located in the fuel tank.
Fuel is supplied to the injectors at a pressure of 3.5 bar.
The SHRADER ring type valve in the fuel rail performs the following functions:
- relieves pressure in the distribution line;
- controls fuel pressure;
- controls fuel consumption.
The fuel filter provides filtration of foreign inclusions up to 15-20 microns.
Safety Requirements and Warnings
Gasoline is extremely flammable and explosive, so care must be taken when working on any part of the fuel system.
Work must be carried out in a well-ventilated area, preferably with open windows and doors to create a draft.
Do not use open flames, electric welding and tools that may generate sparks. Make sure there is a fire extinguisher in the immediate vicinity of the workplace.
Use goggles to protect your eyes from getting fuel in them. If fuel comes into contact with skin, wash the area with plenty of water.
The container in which the fuel is located contains its vapors and is potentially explosive.
When working with the power system, keep it clean, as dirt entering the power system can interfere with the normal operation of the engine.
The idle speed is controlled by a stepper motor.