| 摘要 |
A compression release mechanism for an internal combustion engine wherein a rotatable pin (70) positioned axially parallel to the camshaft (30) is rotatably received in the camshaft lobes (32,34), and has an auxiliary cam surface (74) mounted at an axial end thereof. The auxiliary cam surface (74) is adapted to extend above the outboard camshaft lobe (34) to engage one of the valve lifters to thereby activate a compression release valve when the rotatable pin (70) is rotated to a first position in response to low engine speed. The pin (70) is rotated to a second position in response to high engine speed whereby the auxiliary cam surface (74) is adapted so as not to engage the valve lifter. The pin is rotated by means of a centrifugally activated flyweight (80) in response to engine speed. |
