Honda Giken Kogyo Kabushiki Kaisha

Satoshi Shimashita

Hiroshi Yamaura

Osamu Kudou

Nobuaki Inumaru

Yoshimi Yamaguchi

Kouichi Tsutsumi

A lubrication system for an engine includes an oil discharge port in a lower section of a crankcase. A crankshaft, with a crank web attached thereto, rotates in a rotation direction within the crankcase. A first distance is formed between the crank web and a first inner surface of the crankcase, downstream of the oil discharge port. A second distance is formed between the crank web and a second inner surface of the crankcase, upstream of the oil discharge port. The first distance is less than the second distance. Also, the oil discharge port is defined in part by a back edge, which is wedge shaped and points in a direction opposite the rotation direction of the crankshaft. The back edge scoops oil from the crank web and into the oil discharge port.

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Saitama, Japan

Satoshi Shimashita