A Three-Stage Variable Valve Lift Mechanism for Internal Combustion Engine

Abstract

The invention provides a three-stage variable valve lift mechanism for an internal combustion engine, and is applied to the technical field of engine parts of internal combustion engines. A camshaft sleeve (2) of the three-stage variable valve lift mechanism for the internal combustion engine is movably arranged on a camshaft core shaft (1) in a sleeve mode, a valve core A (7) and a valve core B (8) are arranged on an electromagnetic valve (3), and a deep guide groove A (9), a shallow guide part A (10), a deep guide groove B (11) and a protruding shallow guide part B (12) are arranged in the camshaft sleeve (2). According to the three-stage variable valve lift mechanism for the internal combustion engine, the structure is simple, the relative positions of a camshaft and the camshaft sleevecan be conveniently and reliably adjusted, three-stage adjustment of a valve lift cam is realized, so that the internal combustion engine can work in the optimal working condition all the time, therefore, oil consumption is effectively reduced, the performance is improved, and energy conservation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engine components, and more specifically relates to a three-stage 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 s...

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 technical defects in the variable valve lift mechanism in the prior art are: 1. A pin shaft cooperates with a spiral groove to control the movement of the bushing in one direction

3. Most of the existing variable valve technologies are two-stage variable valve technologies

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