BMW 3 Series E46
since 1998 release
Repair and operation of the car
BMW 3 Series E46
+ BMW 3 cars (E46)
+ Current leaving and service
+ Procedures of repair of the engine
- Engine lubrication system
Oil circulation contour
Removal and installation of the pallet of a case
Check of pressure of oil
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Engine electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ Schemes of electric equipment
Oil circulation contourEngines are supplied with the so-called lubrication system under pressure. The oil pump soaks up through a grid motive oil from the pallet of a case and gives it under pressure through an oil filter. On the party of pressure of the oil pump there is a reducing valve. Via the central pipeline of an oil filter the filtered oil comes to the main oil canal. At a contamination of an oil filter perepuskny the valve directs oil without its filtration directly to the main oil canal.
Behind an oil filter the reducing valve is located. At excess of pressure the valve opens, and a part of oil merges back in the case pallet.
From the main oil channel channels of lubricant of bearings of a bent shaft branch off. Via inclined channels in cranked to a shaft oil arrives to conrod bearings. Cooling of the bottom of the piston is carried out through the nozzles giving oil from below on the piston.
At the same time motive oil comes via vertical pipelines to a head of cylinders, supplying with oil camshaft bearings, compensators of valvate gaps and guides of valves. Resistance on plum provide the guaranteed supply of oil for lubricant of the specified elements in a head of cylinders. At the 6-tsilndrovy petrol engine oil via the valve moves also depending on requirement in the mechanism of adjustment of the camshaft.
Besides, oil moves to GRM drive chains, and at the 6-cylinder engine the chain of the drive of the oil pump is greased.
At the internal combustion engine the consumption of oil is understood as amount of oil which is consumed owing to combustion process. It is not necessary to understand as it the oil consumption connected with its leaks owing to leakage via the case pallet, a cover of a head of cylinders etc. at all.
The normal consumption of oil consists of combustion of a small amount of oil in cylinders, together with removal of the fulfilled gases, and wear. Besides, oil is lost as a result of the influence of high temperature and high pressure arising in the engine. On loss of oil also service conditions as, for example, style of driving, and also admissions of production of elements of the engine make impact. The consumption of oil should not be more 1.0l/1000 km.