Lubricating oil supply system for the connecting rod bearings of a crankshaft of a multi-cylinder internal-combustion engine

摘要

A lubricating oil supply system is provided for the connecting rod bearings of a crankshaft of a multi-cylinder internal-combustion engine. Oil ducts extend from the bearing journals to the crank pins of the crankshaft, the oil supply taking place by way of the main bearings of the crankshaft in that the oil ducts extend from one main bearing or bearing journal respectively to the crank pins or connecting rod bearings in each case adjoining on both sides. In the respective bearing journals of the crankshaft for the lubricating oil supply to the connecting rod bearings adjoining on the left and right respectively, two oil bores respectively are provided which extend at an angle and, converging to an oil bore, extend to the two adjoining crank pins. The two oil bores interact with oil supply grooves provided in the main bearings for the lubricating oil supply. Particularly for a 6-cylinder opposed-cylinder engine, a reliable and secure lubricating oil supply is ensured while maintaining the bearing widths of the crankshaft required for absorbing the gas forces and inertial forces respectively.