Design and function
Group 22: Lubrication system
The engine is pressure lubricated by a gear wheel pump connect to the engine’s transmission. The oil flow is controlled by 7 valves. The lubricating oil pump is driven directly by the crankshaft gear and pressures oil to two full-flow filters and one by-pass filter (turbo filter). The by-bypass filter has low through-flow and a high degree of filtration. Along the cylinder block, two channels are drilled, where the one in the left-hand side of the block is the lubricating oil channel that supplies all bearings on the crank mechanism with oil. The lubricating oil channel is plugged at both the front and rear. The second channel, in the right-hand side of the block, is the piston cooling channel that supplies pistons with oil for cooling and lubrication. The piston cooling channel is plugged at both ends. All bearings in the cylinder head are lubricated from the hollow rocker bridge connected with the cylinder block via a cast channel located centrally in the block.
22
The oil pump housing is made of aluminum. The pump is driven directly by the crankshaft drive. The oil pump housing and the two pump wheels are machined together and cannot be exchanged separately. The pump wheel shafts are journalled directly in the oil pump housing. Suction and delivery pipes are made of steel and are sealed against the pump cover and the oil dispenser house with rubber seals. The pump housing is screwed into the cylinder block foot and acts as a bracket for the suction strainer, which is also secured to the bracing frame. The oil pump safety valve is located in the filter housing. The oil cooler is of a flat type and placed on the righthand side of the engine, on the inside of the cooling jacket side door and totally enclosed in coolant.
