+ Running gear
+ Regular servicing
Technology of the engine, maintenance service and repair
Exhaust ventilation картера
The visual control of the engine
Engine service life
Nominal and maximum frequency of turns
Restriction of number of turns
Measurement of pressure of compression
The help at malfunctions
Works on a gear belt
The help at malfunction
Installation and dismantle of a head of the block of cylinders
Installation and engine dismantle
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
Search of malfunctions
Labyrinth: the basic idea new three-section картера, designed for Audi A4.
Here in a cut the oil radiator (2) in which engine oil, in the engine with working volume 1,6 l is cooled is shown. All engines Audi are supplied by such oil radiator. Cooled oil is brought through knot of connection «1» – and the following knot – on an oil radiator and cools engine oil at the expense of the plates of a radiator visible in this photo. Oil is forced through the oil filter (3).
The oil pump
At full gas the oil pump pumps over through the engine about 30 l of oil a minute:
- In the four-cylinder engine the intermediate shaft puts in action a shaft which bottom part puts in action the oil pump.
- In the 16-cylinder engine the oil pump is established on коленвале ahead in the direction of travel.
Method of work of pumps in our engines Audi too the different.
- In the four-cylinder engine there is a gear oil pump. Two gear wheels of the identical size linked with each other simply scoop oil from the soaking up party to the forcing party.
- The six-cylinder engine is greased роторным with the oil pump of system of Eton. In this case the gear wheel with an external teeth is placed in a gear wheel with an internal teeth (these are both rotors). At the expense of giving of the special form and an excentric arrangement of an internal rotor the effect at which at joint rotation of both gear wheels new spaces with the lowered pressure are constantly created is reached. Thus, engine oil is soaked up. From rotating gear wheels oil is wrung out to the final party of the pump and therefrom in lubricant channels.
For good "state of health" of the engine the oil temperature has crucial importance. Driver Audi can receive this information only from the built in additional devices. We will compare for interest engine temperature on a flange of the oil filter or on the oil pump; there temperature of greasing the lowest. On the contrary, on piston rings the oil temperature reaches 300 °С.
If you go by the car with the thermometer for measurement of temperature of oil: Audi considers 145 °С in картере as as much as possible admissible temperature. Though a condition of it is presence of high-quality oil according to the instruction.
Too low temperature of oil is harmful to the engine also. In this case oil yet has not reached the full lubricant ability. Whenever possible, after start of the cold engine do not lift turns above 3500 in mines until oil will not be warmed up approximately to 60 °С. The Reference point considers that fact that to oil it is necessary for twice more time, than a cooling liquid to reach the working temperature.
Pressure of oil
If in yours Audi A4 the gauge of pressure of oil or if you can connect to the engine the gauge of pressure of oil in a workshop instead of the switch of pressure of oil it is possible to supervise independently its pressure within accuracy of the measuring device is built in. A check condition: temperature of oil 80 °С. Following indicators Should be received:
- Pressure of oil idling: 1–2,5 bar.
- Pressure of oil at 3000 rpm: 3–5 bar.
Pressure of oil also is well supervised without the device in Audi. In more details you learn about it in the head Tools and devices.