Mercedes S-Class W-220
since 1998 of release
Repair and car operation
+ Mercedes-Benz Cars of a class S (W220)
+ Operation manual
+ Routine maintenance
+ cooling and heating Systems
- Power supply system and release
- Power supply system and fuel injection
Sbrasyvaniye of pressure in fuel system of the petrol engine
Management of capacity distribution - the description and a principle of the organization of function of shutdown of cylinders
Supercharger of air
Check and adjustment of number of turns of the single course/the moment of ignition/concentration WITH
+ System of injection of fuel of the diesel engine. Turbokompressor
+ Systems of release and decrease in toxicity of the fulfilled gases
+ engine Electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ electric equipment Cхемы
Power supply system and fuel injection
General information and security measuresFuel tank
Function chart of system of microprocessor management of ME SFI 2.0. V6 and V8 engines
Arrangement of some electric elements
Air streams of the inlet pipeline with changeable geometry
Management of a gazoraspredeleniye. V6 and V8 engines
Elements of the inlet pipeline with changeable geometry
Into structure of fuel system enter: established in a back part of the car (under a pillow of a back seat) a fuel tank with an adsorber on absorbent carbon, топливопроводы, the electric fuel pump, and also the electronic system of consecutive injection operated by the control unit. The function chart of a control system and an arrangement of sensors are presented on accompanying illustrations.
The stock of fuel is shown to the driver on the dashboard. On the petrol engine of pair of gasoline gather in an adsorber and move in chambers of combustion of the engine.
Essential influence on fuel consumption renders style of driving of the car. Councils on decrease in fuel consumption:
Diesel enginesInto structure of fuel system enter: established in a back part of the car (under a pillow of a back seat) a fuel tank, the fuel filter, nozzles, fuel tubes and hoses, the sensor of a stock of the fuel, located in a tank and the block of electronic control by the engine.
Fuel moves the special pump via the filter. In the filter dirt and the water containing in fuel settles.
The engine copes the electronic system similar to a control system of petrol engines. The system operates operation of the engine, analyzing information arriving from a large number of sensors.
On diesel models there is no accelerator cable. Instead of it on a pedal the sensor of its situation is established.
The valve of an otsechka of fuel at switching off of ignition is absent. To muffle the engine at ignition switching off, the control unit the engine sends a signal which, in turn, stops supply of fuel to nozzles to the TNVD control unit.
Components of a fuel tank do not act in film. The fuel system is designed so that not to allow «подсоса» some air in the absence of fuel in a tank. The control unit constantly checks fuel level in a tank, processing information arriving from the sensor of a stock of fuel, located in a tank. When falling a stock of fuel to a certain level the control unit lights warning lamp on a control panel then compulsorily causes admissions of supply of fuel, limiting to that the maximum speed. It proceeds until fuel level in a tank will not exceed an admissible mark.
The fuel system of diesel engines is very reliable. During the using of pure fuel and performance of regular service it should function regularly before the termination of service life of the car. After very big run internal components of nozzles can wear out, and they will be necessary for repairing. As the pump - nozzles have a difficult design, repair is recommended to be carried out in a specialized workshop.
The fuel pump takes away fuel (D) of the bottom point of the damper (55/4) serving for prevention of hit in an inlet path of the pump of air during commission of turns with low level of fuel in a tank (75).
Pogruzhna the fuel pump (M3/1) copes the electronic module tracing quality of filling of a damper and provides an expense of 220 l/h at effective a napoyer of 0.3 atm.
In addition fuel pumping in a damper is carried out by the auxiliary soaking-up pump working at the expense of a stream of superfluous fuel, returned in a tank from a pressure regulator (5.0 atm.).
The components placed in a tank (including the fuel pump) are not subject to removal and regenerative repair and in case of their refusal all tank assembled is subject to replacement. The exception makes only the sensor of a stock of fuel (В4).
The throttle (55/3a) reduces fuel consumption in brought to the pump of pumping of the returnable line (And) to 50 l/h at pressure of 5.0 atm. The regulator of pressure prevents increase of a pressure over 5.3 atm.
Security measures and rules of observance of purity at work with fuel system
Security measures at removal of a fuel tank: