Handheld type four-cycle engine

Details Handheld type four-cycle engine Handheld type four-cycle engine

F - Mech Eng,Light,Heat,Weapons

02

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F02B 63/02 (2006.01) F01M 1/04 (2006.01) F01M 9/06 (2006.01) F01M 11/06 (2006.01) F01M 13/04 (2006.01) F02B 63/00 (2006.01) F02B 67/06 (2006.01) F02B 75/16 (2006.01) F02B 75/34 (2006.01) F02F 1/00 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2340578

In a handheld type four-cycle engine, a valve operation mechanism includes a camshaft rotatably supported in a cylinder head so as to open and close an intake valve and an exhaust valve and a timing transmission placed on one side outside an engine main body and providing association between a crankshaft and the camshaft, and a centrifugal clutch for power output is mounted on the crankshaft on the opposite side outside the engine main body. The timing transmission and the centrifugal clutch being positioned at the two ends of the crankshaft improves the weight balance, the centre of gravity of the engine can be made as close to the central part of the crankshaft as possible, which, together with the reduced weight, can enhance the operability of the engine.

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