| 摘要 |
A throttle valve actuator for an internal combustion engine includes a throttle body for defining at least one aperture or passageway extending therethrough to deliver a charge to a combustion chamber in communication with the aperture. At least one valve is mounted on a shaft for rotating within the aperture of the throttle body to control the internal combustion engine. A crank arm is connected to the shaft for driving the valve in rotation between a first position and a second position. A pliant cable is connected to the crank arm at an anchor point adjacent one end of the pliant cable. The pliant cable transmits a force to the crank arm to control rotation of the valve connected thereto. A cam is connected to the crank arm for modifying an effective moment arm of force being transmitted between the pliant cable and the crank arm, such that the moment arm rapidly decreases during a first angular portion of rotation about the shaft from the first or closed position and substantially stabilizes during a second angular portion of rotation about the shaft to the second or open position.
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