Variable valve lift mechanism of internal combustion engine

Abstract

The invention provides a variable valve lift mechanism of an internal combustion engine, and belongs to the technical field of internal combustion engines (engines). A shaft sleeve supporting position (6) is arranged at the side edge position of an adjusting component (3) of each shaft sleeve (2) of the variable valve lift mechanism of the internal combustion engine or the side edge of a cam group (5), a valve pin (4) of each electromagnetic valve is aligned with a displacement groove (7) of one adjusting component (3), each valve pin (4) is arranged to be of a structure with two lifts of extending long-position lift and extending short-position lift, a deep-position displacement groove (8) is provided with a deep-position displacement molded line (10), and a shallow-position displacement groove (9) is provided with a shallow-position displacement molded line (11). According to the variable valve lift mechanism of the internal combustion engine, supporting is more stable and reliable, force during switching is smaller, generated impact sound is smaller, noise reduction performance is good, meanwhile, the axial space is reduced, the arrangement space is saved, and space is vacated for arrangement of a multi-lift cam.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines (engines), and more specifically relates to a variable valve lift mechanism for internal combustion engines. Background technique [0002] As the power machinery with the highest thermal efficiency and the most widely used at present, the internal combustion engine generates 90% of the total power of power plants used in the world, and is the main consumption channel of petroleum energy in the world. With the increase of car ownership, the oil consumption of internal combustion engines will increase rapidly, and the contradiction between oil supply and demand will inevitably become increasingly serious. While consuming a large amount of energy, internal combustion engines are also the biggest source of pollution to the atmospheric environment, especially the urban atmospheric environment. This shows that innovation Internal combustion engine technology is of great significance ...

AI Technical Summary

Problems solved by technology

In traditional internal combustion engines, the valve lift is fixed, which leads to the same valve lift opening regardless of the heavy load or light load conditions, resulting in energy waste and low thermal efficiency

The variable valve lift mechanism in the prior art has a complex structure

And when working, it is impossible to accurately and effectively complete the cam state switching

At the same time, in the variable valve lift mechanism in the prior art, if the cam is too wide, the existing supporting structure has insufficient axial space, and the structural arrangement cannot be reliably realized, thereby affecting the working performance

Images