Table of contents: Engine oil circulation diagram ↓ Oil consumption ↓
Engine oil circulation diagram
- 1 cylinder head oil channel
- 2 main oil channel
- 3 jets of oil for piston cooling
- 4 main flow oil filter
- 5 oil radiator
The engines are equipped with a pressure lubrication system. The oil pump sucks engine oil from the oil pan through a mesh and supplies it under pressure through an oil filter. There is a pressure-reducing valve on the discharge side of the oil pump. When there is excess oil pressure, the valve opens and some of the oil returns to the oil pan.
Through the central part of the filter cartridge, the filtered oil enters the main oil channel. There is an oil pressure indicator sensor, which indicates to the driver an unacceptable drop in oil pressure via a control lamp in the instrument panel unit. If the oil filter is clogged, the bypass valve directs the oil directly into the main oil channel without filtering it.
The main oil channel branches off into the crankshaft bearing lubrication channels. Oil flows through inclined channels in the crankshaft to the connecting rod bearings. The piston bottom is cooled through nozzles that feed oil from below into the piston.
At the same time, engine oil enters the cylinder head through vertical pipes, supplying oil to the camshaft bearings and valve clearance compensators.
Depending on the version, the oil is cooled by means of a radiator located on the flange of the oil filter and included in the engine cooling system.
Oil consumption
Oil consumption refers to the amount of oil consumed during combustion. It should never be understood as oil consumption due to leaks through the oil pan, cylinder head cover, etc.
Normal oil consumption occurs when a small amount of oil is burned in the cylinders, together with exhaust gases and wear. In addition, oil is lost as a result of the high temperatures and high pressures that occur in the engine. Operating conditions such as driving style and manufacturing tolerances of engine components also affect oil loss. Oil consumption should not exceed 1.0 l/1000 km.
Warning: Never fill the oil above the Max mark. If the oil has been overfilled, the excess must be pumped out. Otherwise, the catalytic converter may be damaged by unburned oil entering it.
[The original material is located on the website: audimanual.ru]