Multifunctional modularization variable valve driving system for four-cylinder internal combustion engine

Abstract

The invention discloses a multifunctional modularization variable valve driving system for a four-cylinder internal combustion engine, and belongs to the field of internal combustion engine variable valve driving systems. The multifunctional modularization variable valve driving system mainly comprises oil supply modules, a stage limiting module, a mode selection module, a control module, an oil conveying module, a valve driving module and the like. According to the multifunctional modularization variable valve driving system, the purpose that the valve closing process is not limited by running stages of the oil supply modules is achieved through the designed stage limiting module with the simple structure, the continuous variable valve event can be achieved only through the two oil supply modules and two two-position two-way valves, the full variable valve event can be achieved only through the two oil supply modules, two two-position three-way valves and a two-position two-way valve, and the cost is greatly reduced; the flexible conversion of a driving mode and a braking mode of the internal combustion engine is achieved through the mode selection module, the components of the system are independent in function, the modules are selected according to the requirement for the air distribution mode, the valve operation flexible degree, the existence of the braking mode and the like, the other modules do not need to be changed, the adaptability of the system is good, and the application range is wide.

Description

technical field [0001] The invention relates to a modular multifunctional variable valve drive system for a 4-cylinder internal combustion engine, which belongs to the drive system capable of realizing variable valves of the internal combustion engine. Background technique [0002] With the rapid development of the world economy, energy and environment issues have become important issues affecting sustainable economic development. As the most widely used power machinery in the world, the internal combustion engine consumes a large amount of fuel every year and emits a large amount of harmful gases and particles. The work of energy saving and emission reduction of internal combustion engines is urgent. Because of its potential to improve the performance of internal combustion engines, variable valve technology has attracted extensive attention from internal combustion engine research institutions and enterprises at home and abroad. In addition, with the sharp increase in the...

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Problems solved by technology

However, the system still has the following two problems to be solved: 1) The structure of the cycle selector is complicated, and the number of external oil pipes is large, which reduces the manufacturability of the system and increases the cost and layout diffic...

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