| 摘要 |
<p>A valve clearance adjustment mechanism (64) for use in small internal combustion engines such as, for example, side valve engines and overhead valve engines, which generally include intake and exhaust valves (48a, 48b) actuated by lifters (42a, 42b) pivotally mounted within the engine housing (10), which in turn are actuated by cam lobes (32a, 32b) driven in timed rotation with the crankshaft. An adjustment member (66) is provided for mounting each lifter to a shaft (76), wherein the adjustment member is eccentric relative to the shaft, such that rotation of the adjustment member modifies the position of the lifter and in turn modifies the valve clearance between the lifter and the valve. After the valve clearance has been properly set, the adjustment member is fixed in position.
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