LUBRICATION DEVICE FOR ENGINE OF MULTICYLINDER PART OIL COOLED TYPE

PURPOSE:To reduce pressure supply loss in oil by forming an oil supply passage reaching a crank shaft bearing part penetrating a hanger part from the bottom of a part extending to each cylinder chamber of cooling oil jacket. CONSTITUTION:A plurality of cylinder chambers 3a, 3b are parallelly arranged at a cylinder block 2 of an engine main body 1. A cooling oil jacket 4 extending to the thick wall part of the cylinder block 2 between the cylinder chambers 3a, 3b and one side of each cylinder chamber 3a, 3b is formed. Furthermore, an oil supply passage 7 is formed which reaches the bearing part 5a of a crank shaft penetrating a hanger part supporting the crank shaft 5 from the bottom of a part extending to each cylinder chamber 3a, 3b of the cooling oil jacket 4. Since the whole length of pressure oil passage formed at a crank case is shortened, generation of oil leak is reduced so that pressure supply loss caused by oil leak is reduced.