Single-cam-shaft switch pivot type variable-mode air valve driving system

Abstract

The invention discloses a single-cam-shaft switch pivot type variable-mode air valve driving system, and belongs to the field of engine valve driving, cylinder deactivation and auxiliary braking. The single-cam-shaft switch pivot type variable-mode air valve driving system comprises an exhaust valve assembly, an exhaust braking cam, an exhaust driving cam, an air intake driving cam, an air intake braking cam, an exhaust braking rocker arm, an exhaust driving rocker arm, an air intake driving rocker arm, an air intake braking rocker arm, an exhaust braking pivot assembly, an exhaust driving pivot assembly, an air intake driving pivot assembly, an air intake braking pivot assembly and the like. By control over states of all pivots, four-stroke driving, two-stroke driving, cylinder deactivation and other modes are realized, thus fulfilling the aims of low oil consumption, low emission and efficient braking. The number of moving pieces is small, and the system is compact in structure, high in reliability, low in cost, low in energy consumption and leakage-free.

Description

technical field [0001] The invention relates to a single camshaft switch fulcrum variable mode valve driving system, belonging to the fields of engine valve driving, cylinder deactivation and auxiliary braking. Background technique [0002] With the rapid increase of the number of engines, energy and environmental issues have become one of the major issues restricting my country's sustainable development. Because of its ability to effectively reduce engine fuel consumption and emissions, cylinder deactivation technology has attracted much attention. Studies have shown that completely closing the intake and exhaust valves during cylinder deactivation can effectively reduce pumping loss and improve the ability of cylinder deactivation technology to reduce fuel consumption and emissions. [0003] People pay more and more attention to vehicle safety, and more and more countries list the auxiliary braking system as one of the necessary accessories for vehicles. However, most ...

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Problems solved by technology

In addition, this mechanism also has problems such as a large number of moving parts and a large mass caused by both the drive and brake adjustment mechanisms being installed on the rocker arm, which is not conducive to the low energy consumption of the valve drive system; in addition, the motion inertia of the rocker arm is large. The contact parts of the system components are prone to damage

The drive oil of this mechanism is led from the inside of the shaft as the fixed fulcrum of the rocker arm to the movable fulcrum of the rocker arm to adjust the drive and brake adjustment mechanism. The oil circuit is relatively complicated and difficult to process.

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