Patent ID: 7367328
Filing Date: 2008-05-06
Classification: F01M,F02B,F02M,Y02T

Abstract:
1. A four-cycle engine comprising: an engine case including a crank chamber that is configured to accommodate a crankshaft and a transmission chamber that is substantially separated from the crank chamber and is configured to accommodate a transmission, the crank chamber being disposed such that a cylinder block of the engine is provided on the crank chamber; a pump that includes an inlet and an outlet and is configured to suction air from an inner space of the engine case through the inlet and to discharge the air outside the engine case through the outlet; and an air suction passage that has one end portion configured to open in the inner space of the engine case and an opposite end portion coupled to the inlet of the pump to discharge the air outside the engine case; wherein the air suction passage extends to the pump through an upper region of the engine case.