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Mercedes S-Class W-140In 1991-1999 editionsRepair and enterprise of the car |
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Mercedes S-Class + Mercedes Benz cars of the class S (W-140) + operation manual + Routine maintenance + motor + Cooling systems, heating - Systems of power supply and edition + system of power supply and an injection of the combustible petrol engine - the general information - System of an injection of the combustible diesel engine - the general information Checks of system of an injection of fuel + tax system injection of fuel and ignition of HFM-SFI (6-cylinder petrol engines) + tax systems LH-SFI and ME-SFI motor (8-cylinder petrol engines) + tax systems injection of fuel and ignition of ME-SFI and LH-SFI (12-cylinder petrol engines) + tax system fuel injection (diesel engines of the OM603.971 series) + tax system fuel injection (diesel engines of the OM606.961 series) + system of a turbo charging - the general information Systems of immersion of toxicity of the edition - the general information System of the edition of the working gases - the general information Catalytic reformer (petrol models) + electric equipment of the motor + gear shifting boxes + Awtomatitscheckaja transmission + connection + brake system + Aufhängung and management + body + electric onboard equipment |
System of an injection of the combustible diesel engine - the general information General information Come to structure of system of fuel: defines in constructing machines (under a pillow of back sitting) the tank, the filter for fuel, a nozzle, listeners of fuel and hoses, a sensor of a reserve of the fuel located within the tank and the pipe control unit of the motor. Fuel is served as the special pump by means of the filter. In the filter dirt and water which is brought in fuel goes down. Clean air which contracts to high pressure gets into operating time of the diesel engine in its cylinders. At the same time air temperature to 700 - 900 °C, the passing temperature of ignition of diesel fuel rises. Fuel is injected into the cylinder with some advancing and inspires itself. Thus spark plugs are not used for fuel ignition. For reduction of participation of harmful materials in the working gases diesel engines have a catalytic reformer of the diesel of oxygenating. At the same time the rezirkuljazii system essential immersion in the working gases guarantees the content of nitrogen oxides. Reach thanks to transfer of the working gases to the air absorbed by the motor that guarantees immersion of concentration of oxygen in air which works in motor cylinders. It leads to immersion of delay of ignition and to lower temperature of combustion that education reduces NOx in the end result. Nevertheless, process of rezirkuljazii of the working gases has to be dosed precisely, otherwise the content of soot grows in the working gases. For this purpose the amount of the soaked-up air of the measuring device clears up that allows to operate to the electronic device process of rezirkuljazii. The injection of fuel is directly carried out in the burning camera. Chart of the sequence of system of an injection of the diesel engine
Pneumovereinigungen on sensors
The motor copes from electronic system which is similar to tax system petrol engines. The system operates operation of the motor, information analyzing which works about a large number of sensors. Scheme of transferring of associations of vacuum Scheme of transferring of lines of vacuum (turbodiselnyj motor 3.0)
On diesel models there is no accelerator pedal rope. Instead of it on a pedal the sensor of its situation is defined. The otsetschki gate of fuel is absent at an ignition exception. To deafen the motor at an ignition exception, the motor control unit sends a signal which, transfer of fuel to nozzles in return establishes to the TNWD control unit. The system of fuel is designed so that not to allow air "podsossa" in the absence of fuel in the tank. The control unit checks fuel level in the tank constantly, information which works about a sensor of a reserve of the fuel located in the tank processing. When falling a reserve of fuel to a certain level the control unit lights the notifying lamp on the control panel then causes admissions of transfer of fuel inevitably thereof speed limit ogranichitelno. It proceeds until the level of fuel does not pass an admissible note in the tank. Information on situation kolenwala and speed of Drehens of the motor works in the control unit about a sensor of situation kolenwala (CKP). The inductive head of a sensor is located in comparison with a flywheel and constantly investigates special signs (36 pieces), charged on its surface. At pass of a sign by it sends to the sensor head an impulse to the control unit. Signs are charged on a flywheel surface evenly, but the sign is passed. It has to be in 90 ° to WMT of the first cylinder. During pass of a flywheel of this point the sensor does not send an impulse to the control unit. The block distinguishes this pause and precisely definitely WMT moment. The term of this pause is used for determination of speed of Drehens of the motor. Information on quantity and temperature of the air operating in the motor trades about a sensor of absolute pressure in the pipeline of access (MAP) and sensors of air temperature. The sensor of absolute pressure is connected with the pipeline of a hose of vacuum and measures pressure there. It is defined to 2 sensors of air temperature. One before a turbocompressor, and another - after interkulera it is certain. Temperature and pressure of air are used for calculation of exact amount of fuel which has to fall to nozzles. The traditional sensor of temperature of the cooled liquid is replaced with a block head temperature sensor. It takes the heads temperature and sends the obtained information to the control unit. Analyzing this information, the control unit corrects structure and the moment of an injection of mix of fuel, and also operates system of the warm movement of the cold motor. The switch of stoplights and sensor of a foot brake informs the control unit on the current provision of a foot brake. When receiving signals of these sensors the tax system transfers the motor to idling at present until the signal of a sensor of provision of a pedal of a pedal of an accelerator does not receive. The rope of a pedal of an accelerator is absent. Instead of it on a sensor of provision of a pedal of a pedal of an accelerator it is defined. The sensor constantly informs the control unit on the provision of a pedal which, in return characteristics of an injection precisely is considered. Not aggravated changes become also settled from the control unit cannot be settled manually. The control unit the size of changes of idling, they considers information analyzing which works about various sensors, depending on load of the motor and its temperatures correcting. The system of an injection of fuel is a system of a direct injection. In lands of pistons there are whirlwind cameras which guarantee Verwirbelung of the fuel burning operating in cameras. For optimization of combustion of fuel of a nozzle reveal in 2 stages (for this purpose 2 feathers) are in limits of each nozzle. When opening a nozzle a small part of fuel gets to internal components of a nozzle, they greasing, and comes back to the tank. Control of warming up of the cold motor is exercised from the motor control unit. At the cold motor the control unit injection moment moves. Work of candles of nakaliwanija operates the motor control unit, in return. Candles of nakaliwanija are defined in each cylinder and are enlisted before start of the motor, I work motor proworatschiwanija as a starter and certain time after start of the motor now. Candles significantly facilitate start of the cold motor. After the application of ignition on the control panel the corresponding control lamp burns (spend to themselves to the car equipment, an arrangement of devices and administrative bodies of the head the operation manual), signaling about the appendix of candles nakaliwanija. Hardly the lamp will lose force, you can start the motor. If air temperature very low which continue candles to work still certain time after start of the motor. From this reach stable operation of the motor and immersion of harmful adulterations in the working gases. Owing to high starting quality of the motor with a direct injection in a cold state demand preliminary tension only at a temperature below 10 °S. Fuel goes the filter for fuel. In the filter fuel separates from water and pollution. Therefore it is important to delete water from fuel and, to make timely compensation of the filtering element. The system of fuel of diesel engines is very sure. At the appendix of pure fuel and execution of regular service it has to function before the termination of term of the car regularly. After very big movement internal components of nozzles can wear out, and it is necessary to repair them. As the pump - at nozzles is a difficult design, recommended repair, in the allocated workshop fill. |
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