2.5.1. General information

Fig. 2.186. Lubrication system components

The lubrication system combined: spraying and under pressure. Under pressure radical and conrod bearings and support of camshafts are greased. The system consists of an oil case, the gear oil pump with an oil receiver, a full-line oil filter, the sensor of pressure of oil and oil valves.
The oil pump takes away oil from the pallet of a case of the engine and gives it to an oil filter. From forcing of the oil pump there is perepuskny a valve. With too high pressure of oil the valve opens, and a part of oil flows down back in the engine pallet.
Through the middle of the filtering element of an oil filter pure oil comes to the trunk oil main. At a contamination of the filter bypass the valve located in the case of an oil filter gives not filtered oil directly to the trunk oil main. In a branch pipe of an oil filter there is a backpressure valve which interferes with emptying of oil channels and hydraulic pushers of valves of the engine. Channels for lubricant of bearings of the crankshaft depart from the trunk oil main. Through inclined openings in the crankshaft oil moves to conrod bearings, and from there is sprayed on piston fingers and cylinders. At the same time on the ascending channels oil moves in a head of the block of cylinders and provides lubricant of bearings of the camshaft and work of hydraulic pushers.

Oil consumption
Speaking about an oil consumption in the internal combustion engine, only that amount of oil which is spent owing to combustion process (an expense on waste) means. It is not necessary to confuse an oil consumption to the loss of oil happening because of leakage of the pallet of a case, a cover of a head of cylinders, etc. at all. The normal consumption of oil arises owing to combustion of a small amount in cylinders, and also because of withdrawal of the remains of combustion and particles of products of wear. Oil wears out under the influence of high temperatures and the high pressure arising in engine cylinders. External factors, such as a driving manner, and also accuracy of production of details of the engine also exert a great influence on an oil consumption.
The most admissible consumption of oil in operation can make 1,0 l on 1000 km of a run.
On reaching a minimum mark oil has to be added surely (the amount of the added oil should not exceed 1 l).

On the cars equipped with engines with catalytic converter it is necessary to watch that oil level on the masloizmeritelny probe was not above a maximum mark. If in the car with catalytic converter too much oil was filled in, its excess part has to be removed from a case by means of discharge or a suction (the special vacuum pump), otherwise not burned down oil will get into system of production of the fulfilled gases and can destroy catalytic converter.

The choice of oil for the engine lubrication system
All-weather oil is applied to lubricant of engines of cars of Hyundai. All-weather oils have that advantage that they can be used both in winter, and in summertime. All-weather oils are based on liquid seasonal oils (for example, a class of viscosity 15W). At the expense of so-called thickeners oil is stabilized in a hot state so for each state necessary lubricant properties are provided. "W" on classification of SAE indicates that this oil can be used in the winter.
Legkokhodny oils represent all-weather oils with antifrictional additives, at their application economy of fuel to 2% is possible. Legkokhodny oils have low viscosity (for example, 10W-30). They demand a special basis (synthetic oils).
The recommended class of quality of oil on API: HE BELOW SG or SH.
The recommended class of viscosity of oil on SAE: depending on the expected air temperature before the following replacement of oil.