Mechanism & Function -- Lubrication (H6DO): Overview Subaru Outback BP рестайлинг

Scheme 1

1. The lubrication system forcibly circulates engine oil throughout the engine using an oil pump. The oil pressure is regulated by the relief valve.
2. The oil pump is a thin, large-diameter trochoid rotor type which can accommodate the engine's high output. The pump is directly driven by the crankshaft.
3. The engine oil is cleaned by a full-flow, paper element type oil filter. The filter has a bypass valve, which allows the engine oil to flow bypassing the filter if it is clogged.
4. The engine oil discharged from the oil pump is delivered to the journal bearings, connecting rod bearings, and other parts requiring lubrication and cooling via an oil passage, oil filter, and oil galleries.
5. The engine oil is also distributed to each cylinder head valve mechanism at a proper flow rate achieved by metering by the orifice provided in each cylinder head oil gallery.

Scheme 2

Scheme 3

1. The oil pump is a thin, large-diameter trochoid roller pump directly driven by the crankshaft. Its outer rotor and inner rotor are assembled with each other inside the rotor housing which is formed in the rear chain cover. The rotor housing is closed by the oil pump cover. The oil pump cover is made of aluminum die-casting and the outer rotor and inner rotor are made of sintered metal.
2. When the pump discharge pressure exceeds a certain level, the relief valve opens and allows excess oil to return to the inlet of the pump. Two relief valves are installed; one in the oil pump cover and one in the oil pan upper.