Intensive multifunctional fully variable valve actuation system for 4-cylinder internal combustion engine

Abstract

An intensive multifunctional fully variable valve actuation system for a 4-cylinder internal combustion engine belongs to the field of valve actuation systems of internal combustion engines and comprises oil feeders, a cycle selector, a mode converter, two-position three-way valves, a two-position two-way valve, an valve actuator and the like. The cycle selector only needs the two oil feeders, the two two-position three-way valves and one two-position two-way valve to achieve a variable valve event required by an actuating mode and a braking mode of the internal combustion mode, so that powerful functions are achieved through extremely low costs; the operation of the valve is completely flexible, particularly the closing process of the valve is not restricted by the operation phase of the oil feeders, a valve advanced closing event required by idling and middle-low loads of the internal combustion engine is met, and fuel consumption and emission of the internal combustion engine in practical application can be reduced sufficiently; the intensive multifunctional fully variable valve actuation system for the 4-cylinder internal combustion engine can be applied to a naturally aspirated and turbocharged internal combustion engines only by exchanging objects communicated onto the two oil openings of the mode converter, the type adaptability is good, the application range is wide and the arrangement of the system on a practical vehicle type can be facilitated.

Description

technical field [0001] The invention relates to an intensive multifunctional fully variable valve driving system for a 4-cylinder internal combustion engine, which belongs to a variable valve driving system capable of realizing the internal combustion engine. Background technique [0002] With the 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. In addition, with the sharp increase in the number of internal combustion engines, the annual loss of people's lives and property caused by traffic accidents is increasing year by year. People pay more and more attention to vehicle safety, and more and more countries list auxi...

AI Technical Summary

Problems solved by technology

However, there are still two problems to be solved in this system: 1) The solenoid valve used in this system is a two-position five-way valve, which has a relatively complicated structure and high processing cost; 2) In the driving mode of the internal combustion engine, the system cannot realize A variable valve event that closes the valve early during the fuel supply phase will limit the performance improvement of the system at idle speed and low to medium operating conditions, which are exactly the typical operating conditions of urban vehicles, and the operation of the internal combustion engine under these conditions Circumstances largely determine the fuel consumption and emissions of the vehicle in actual operation

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