Actuating mechanism of variable valve stroke drive device for engine

Abstract

The invention discloses an actuating mechanism of a variable valve stroke drive device for an engine. The actuating mechanism comprise a driving part and a driven part, wherein the driving part comprises a driving shaft and a driving gear sleeved on the driving shaft, the driven part comprises a driven shaft and a pivotal axis. The driven shaft is connected with the pivotal axis, any two of the driving shaft, the driven shaft and the pivotal axis are mutually paralleled, the driven shaft is fixed on a cylinder cover of the engine in a rotating shaft, and the driven shaft is provided with a driven gear meshed with the driving gear. The actuating mechanism is compact in structure, the arrangement of the cylinder cover is convenient, meanwhile, the whole weight of the actuating mechanism is light, the whole weight of the engine is effectively reduced, and therefore fuel oil consumption can be reduced to a certain degree. In addition, gear transmission is simple and reliable, stability and durability are good, failure rates of the actuating mechanism are decreased, the whole service life of the actuating mechanism can be prolonged, and use cost can be reduced.

Description

technical field [0001] The invention relates to the field of automobile construction, in particular to an actuating mechanism for a variable valve lift driving device of an engine. Background technique [0002] In the valve drive mechanism of traditional engines, the valve timing is generally determined based on the local optimization of a narrow operating range of the engine, which is fixed during the working process, and the valve movement law is completely determined by the cam profile. However, the traditional gasoline engine has a single cam profile and cannot adjust the intake air volume according to the engine load. The valve operating parameters of the traditional engine valve train are also fixed, and the determination of the parameters depends on the designed operating point. [0003] The existing non-continuously variable valve lift structure has a single lift mode, which cannot realize most of the working conditions of the engine, and the fuel saving effect is n...

AI Technical Summary

Problems solved by technology

[0003] The existing non-continuously variable valve lift structure has a single lift mode, which cannot realize most of the engine's working conditions, and the fuel saving effect is not obvious

However, the existing continuously variable valve lift technology has high component costs, complex structure, high reliability requirements for each component, and greater difficulty in engine cylinder head design. In particular, the structure of the adjustment mechanism is more complicated, and the adjustment process Difficult to control, poor adjustment accuracy

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