Intensive multifunctional continuously-variable valve driving system for four-cylinder internal combustion engine

Abstract

The invention discloses an intensive multifunctional continuously-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 intensive multifunctional continuously-variable valve driving system mainly comprises oil feeders, a cycle selector, a mode converter, two-position two-way valves, an air valve driver and the like. According to the designed cycle selector, a variable valve event required by the driving mode and the braking mode of the internal combustion engine can be achieved simply through the two oil feeders and the two two-position two-way valves, and a strong function is achieved with extremely low cost. The air valve closing process is not limited by the operating stages of the oil feeders, an air valve early closing event required by the idling and medium-low load of the internal combustion engine is met, and the oil consumption and emissions of the internal combustion engine in actual application are fully reduced. The intensive multifunctional continuously-variable valve driving system can be applied to a naturally suction type internal combustion engine and a turbocharging type internal combustion engine only by exchanging the communicated objects of two oil ports in the mode converter, and is good in type adaptability and wide in application range. All the components of the system are connected through oil pipes, and the system can be arranged on an actual machine type conveniently.

Description

technical field [0001] The invention relates to an intensive multifunctional continuous variable valve drive system for a 4-cylinder internal combustion engine, which belongs to the variable valve drive system of 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 auxiliary braking s...

AI Technical Summary

Problems solved by technology

However, the system still has the following two problems to be solved: 1) Since the two-position five-way valve used in the system needs to switch under the condition of different pressure differences of each oil port, the pressure difference change of each oil port is extremely complicated , and, as the speed increases, the response time of the two-position five-way valve is required to be shorter and the flow rate is greater. These requirements have resulted in a complex structure of the two-position five-way valve and high processing costs; 2) In the driving mode of the internal combustion engine, The system cannot realize the variable valve event of closing the valve early in the fuel supply phase, which will limit the performance improvement of the system at idling speed and low-to-medium operating conditions of the internal combustion engine, which are exactly the common operating conditions of urban vehicles. The operation of the internal combustion engine largely determines the fuel consumption and emissions of the vehicle during actual operation

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