Driving device

Abstract

The invention provides a driving device. The driving device comprises a cam and a rocker arm, and also comprises an actuating mechanism, wherein the rocker arm is driven by the cam and is supported on a supporting shaft; the actuating mechanism is used for adjusting the position of the rocker arm and comprises at least one connecting rod, a crank and a guide supporting piece, wherein one end of the connecting rod is hinged with the middle part of the rocker arm through a supporting pin shaft; the other end of the connecting rod is hinged with the crank; the other end of the crank is hinged and supported to the supporting pin shaft; the guide supporting piece is provided with a work curved surface; and the part where the connecting rod and the rocker arm are hinged with each other is supported on the guide supporting piece movably. Because of increasing the adjustment of the opening stroke of a suction and exhaust valve of an air cylinder of an internal combustion engine by the actuating mechanism, the driving device has high capacity of adjusting the opening of the suction and exhaust valve. Because the stroke of the valve depends on the lift range of the cam and the structural parameter lever ratio (L2 / L1) of the rocker arm, so the characteristic of changing the lift range of the valve is achieved by adjusting cam lift range curve parameters and rocker arm structural parameters.

Description

Technical field [0001] The invention relates to a driving device, in particular to a driving device for opening and closing the intake and exhaust valves of an internal combustion engine, in particular to a driving device for opening and closing the intake and exhaust valves of the internal combustion engine of motorcycles and mini automobiles. Background technique [0002] European patent EP 1672183A1 discloses a rocker arm for forcibly controlling a valve device. Wherein, one end of the rocker arm is connected with an adjustment device, and a part of the adjustment device can extend outward to adjust the position of this end of the rocker arm. A rocker roller is arranged in the middle of the rocker arm, and the shaft of the roller is connected with the support shaft of the roller covered on the outer circumference of the cam through a connecting piece. However, the adjustment of the opening stroke of the valve by this forced control device is limited, that is, the stroke of th...

AI Technical Summary

Problems solved by technology

But the shortcoming of this device is the same as the above-mentioned shortcoming in the prior art, all can not make bigger adjustment to the opening and closing phase and stroke of intake and exhaust valve, also can't it be adjusted accurately

Images