Patent ID: 6786187
Filing Date: 2004-09-07
Classification: F01M

Abstract:
An internal combustion engine, comprising:a crankshaft; a crank chamber accommodating said crankshaft; an oil reservoir arranged adjacent to said crank chamber and containing engine oil; at least one communicating channel having a flow resistance disposed between said crank chamber and said oil reservoir, said crank chamber and said oil reservoir being separated from each other by a partition wall, and said at least one communicating channel having said flow resistance comprising an orifice formed in said partition wall, said crank chamber and said oil reservoir always communicating with each other through said orifice, wherein said crank chamber and said oil reservoir are in communication with each other by way of said communicating channel, so that said flow resistance in said communicating channel causes a pressure in said oil reservoir to change with a delay with respect to a change in pressure in said crank chamber, a pressure difference between said crank chamber and said oil reservoir causing a fluid flow through said communicating channel from said crank chamber to said oil reservoir in a first instance and from said oil reservoir to said crank chamber in a second instance; and a suction tube provided on said partition wall, said suction tube extending from said partition wall into the engine oil in said oil reservoir.