A Modular Multifunctional Variable Valve Actuation System for 4-cylinder Internal Combustion Engine

Abstract

The invention relates to a modularized multifunctional variable valve driving system for a 4-cylinder internal combustion engine, which belongs to the field of variable valve driving systems of internal combustion engines. It mainly includes fuel supply module, phase limit module, mode selection module, control module, fuel delivery module, valve drive module and so on. The stage-limiting module designed by the present invention has a very simple structure, and the valve closing process is not limited by the operation stage of the oil supply module. At the same time, only two oil supply modules and two two-position two-way valves are needed to realize continuously variable valves. event, only two oil supply modules, two two-position three-way valves and one two-position two-way valve can realize fully variable valve events, which greatly reduces the cost; the mode selection module realizes the internal combustion engine driving mode and braking Flexible conversion of modes; the functions of each component of the system are independent, and the modules are selected according to the requirements of the gas distribution mode, the flexibility of valve operation, and whether there is a braking mode, without changing other modules. The system has good adaptability and a wide range of applications.

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 difficulty of the system; 2) The functions of the various components of the system Interdependence, for different application requirements, it is necessary to change multiple components and the overall layout of the system, which limits the scope of application of the system

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