| 摘要 |
A device for reducing a load which is imposed on an internal combustion engine when the engine is started, the internal combustion engine having an intake or exhaust valve tappet, which includes a rotatable camshaft having a cam for sliding contact with the intake or exhaust valve tappet, a wheel fixed coaxially to the camshaft, the wheel having a support shaft integrally formed on a side thereof and extending parallel to the axis of the camshaft, a tappet lifting member rotatably supported on the wheel, the tappet lifting member having a cam movable into and out of a base circle of the cam of the camshaft, a weight swingable about the support shaft, the weight having a distal end pivotally coupled to the tappet lifting member and a proximal end rotatably supported on the support shaft, and an urging mechanism, fixedly supported on the support shaft, for urging the weight toward the camshaft to move the cam of the tappet lifting member out of the base circle to press the intake or exhaust valve tappet.
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