2.1.3.1. General information

The lubrication system works under pressure, oil passes through an oil filter. On Mazda engines the environmentally friendly oil filter with the replaceable filtering element is established. The lubrication system – with full-line purification of oil and with supply of oil under pressure to the main moving details and knots of the engine. The system consists of an oil case, the gear oil pump with an oil receiver, a full-line mesh 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.

The pallet of an oil case is manufactured of multilayered steel with high coefficient of damping. On LF and L3 engines the oil cooler with water oil cooling is also installed.

Fig. 2.38. Working components of the lubrication system of the Mazda 3 car: 1 – spring of a natyazhitel of a chain; 2 – natyazhitel of a chain; 3 – oil pump; 4 – sending to a chain; 5 – chain of the oil pump; 6 – asterisk of the oil pump; 7 – oil pallet; 8 – mesh oil filter; 9 – laying; 10 – valve of a maslorazbryzgivayushchy nozzle; 11 – adapter of an oil filter; 12 – oil pressure sensor; 13 – oil filter; 14 – cover of an oil filter; 15 – drain stopper of an oil filter; 16 – sealing ring; 17 – engines of the LF and L3 models; 18 – oil cooler

ATTENTION 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.

Fig. 2.39. Lubrication systems of L8 and LF engines: 1 – cam-shaft; 2 – head of the block of cylinders; 3 – block of cylinders; 4 – valve of a maslorazbryzgivayushchy nozzle; 5 – bent shaft; 6 – oil filter; 7 – perepuskny valve of an oil filter; 8 – oil pump; 9 – mesh oil filter; 10 – oil pallet; 11 – the merged oil; 12 – natyazhitel of a chain; 13 – LF model engine; 14 – oil cooler; 15 – to an oil filter; 16 – from the oil pump; 17 – oil pressure sensor; 18 – opening; 19 – piston; 20 – radical bearing; 21 – bearing of a bent shaft, conrod bearing; 22 – safety valve; 23 – vertical projection; 24 – side view

Fig. 2.40. Lubrication systems of L3 engines: 1 – cam-shaft; 2 – head of the block of cylinders; 3 – block of cylinders; 4 – valve of a maslorazbryzgivayushchy nozzle; 5 – bent shaft; 6 – oil filter; 7 – perepuskny valve of an oil filter; 8 – oil pump; 9 – mesh oil filter; 10 – oil pallet; 11 – the merged oil; 12 – natyazhitel of a chain; 13 – oil cooler; 14 – oil pressure sensor; 15 – opening; 16 – piston; 17 – radical bearing; 18 – bearing of a bent shaft, conrod bearing; 19 – safety valve; 20 – vertical projection; 21 – side view; 22 – balancing shaft; 23 – the oil operating valve (OCV); 24 – executive mechanism of change of phases of gas distribution; 25 – oil filter (internal forward cover of the engine)