Patent ID: 6343584
Filing Date: 2002-02-05
Classification: F01M,F02B,F02F

Abstract:
An engine comprising:a crankcase; a crank chamber formed inside said crankcase; a crankshaft housed inside said crank chamber, said crankshaft rotating in a rotation direction; a crank web attached to said crankshaft; an oil discharge port formed in a lower section of said crank chamber; a first distance formed between an outer periphery of said crank web and a first inner surface of said crankcase, said first inner surface being downstream of said oil discharge port in said rotation direction; a second distance formed between said outer periphery of said crank web and a second inner surface of said crankcase, said second inner surface being upstream of said oil discharge port in said rotation direction, wherein said first distance is less than said second distance; and a balancer chamber formed in said crankcase, said balancer chamber being in fluid communication with said crank chamber.