Patent ID: 8292037

Claim:
An engine lubrication system for a multi-cylinder engine, comprising: a plurality of crank chambers that are partitioned by crankshaft bearing portions of the engine; a number of pumps that take out oil from a lower portion of the engine, the number of the pumps being at least one and less than a number of the crank chambers; an oil storage section that temporarily stores the oil taken out from the lower portion of the engine; a lubrication part that supplies the oil in the oil storage section to a portion to be lubricated of the engine; and a pressure variation suppression section including oil collection passages that are respectively provided for the crank chambers, a designated number of the oil collection passages being merged and connected to at least one of suction ports of the pumps, the pressure variation suppression section being provided between the suction ports of the pumps and the designated number of the crank chambers to be merged, and the pressure variation suppression section suppressing pressure variations in the crank chambers by only the crank chambers between which pressure difference is minimum being permanently merged via an always opened oil flow path through the merged oil collection passages or by only the crank chambers in which pressure variations are in a same phase being permanently merged via the always opened oil flow path through the merged oil collection passages.