Mercedes S-Class W-220
since 1998 release
Repair and operation of the car
+ Mercedes-Benz cars of the class S (W220)
+ Operation manual
+ Routine maintenance
+ Cooling system and heating
- Power supply system and release
- Power supply system and fuel injection
Dropping pressure in fuel system of the petrol engine
Management of distribution of power - the description and the principle of the organization of function of shutdown of cylinders
Supercharger of air
Check and adjustment of speed of the single course / moment of ignition/concentration WITH
+ System of injection of fuel of the diesel engine. Turbocompressor
+ 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
+ Schemes of electric equipment
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 gas distribution. V6 and V8 engines
Elements of the inlet pipeline with changeable geometry
Are a part of fuel system: established in a back part of the car (under a pillow of a back seat) the fuel tank with an adsorber on absorbent carbon, fuel-supply lines, 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 submitted on accompanying illustrations.
The reserve of fuel is shown to the driver on the dashboard. Gather on the petrol engine of couple of gasoline in an adsorber and move in engine combustion chambers.
Style of driving of the car has significant effect on fuel consumption. Councils for decrease in fuel consumption:
Diesel enginesAre a part of fuel system: established in a back part of the car (under a pillow of a back seat) the fuel tank, the fuel filter, nozzles, fuel tubes and hoses, the fuel reserve sensor located in a tank and the block of electronic control the engine.
Fuel moves the special pump via the filter. In the filter the dirt and water which is contained in fuel accumulates.
The engine is operated 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 installed.
The fuel cut-off valve at switching off of ignition is absent. To kill the engine at switching off of ignition, the control unit of the engine sends a signal which, in turn, stops supply of fuel to nozzles to the TNVD control unit.
Components of the fuel tank are not removed. The fuel system is designed so that not to allow air "suction" 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 reserve of the fuel located in a tank. When falling a reserve of fuel to a certain level the control unit lights the warning lamp on the control panel then forcibly causes admissions of supply of fuel, limiting to that the maximum speed. It proceeds until fuel level in a tank does not exceed an admissible mark.
The fuel system of diesel engines is very reliable. When using pure fuel and performing regular service it has to 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 need to be repaired. 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 lower point of the damper (55/4) serving for prevention of hit to the inlet highway of the pump of air during commission of turns with the low level of fuel in a tank (75).
The submersible fuel pump (M3/1) is run by 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 pumping of fuel in a damper is carried out by the auxiliary soaking-up pump working at the expense of a stream of the excess fuel returned in a tank from pressure regulator (5.0 atm.).
The components placed in a tank (including the fuel pump) are not subject to removal and recovery repair and in case of their refusal all tank assembled is subject to replacement. The exception makes only the sensor of a reserve of fuel (B4).
The throttle (55/3a) cuts fuel consumption in the pumping of the returnable line (A) brought to the pump to 50 l/h with a pressure of 5.0 atm. The regulator of pressure prevents increase of a pressure over 5.3 atm.
Security measures and rules of respect for purity during the work with fuel system
Security measures at removal of the fuel tank: