Double-mode type full-variable valve driving system for four-cylinder internal combustion engine

Abstract

The invention relates to a double-mode type full-variable valve driving system for a four-cylinder internal combustion engine, belonging to the field of the variable valve driving system of the internal combustion engine. The double-mode type full-variable valve driving system mainly comprises a mode converter, a driving circulator, a forward oil supply device, a reverse oil supply device, valve driving mechanisms of all cylinders, a forward high-speed valve, a reverse high-speed valve, an oil tank, oil pipes and the like. The invention provides the mode converter and the driving circulator with a three-layer embedding type structure according to the number of the engine cylinders and the ignition sequence, not only can achieve the purpose that all inlet (exhaust) valve driving mechanismscan be completely and flexibly driven by only using two electromagnetic valves to realize a variable valve event required by a driving mode of the internal combustion engine as a power source and a braking mode of the internal combustion engine as a consuming source, can be used as a gas distributing system and an auxiliary braking system of the internal combustion engine, realizes powerful functions with extremely-low cost, can be applied to natural gas-suction type or turbo-supercharging type internal combustion engines by only needing to exchange a communication object of the two oil pipes, and is good in model adaptability and wide in application range.

Description

technical field [0001] The invention relates to a dual-mode all-valve driving system for a 4-cylinder internal combustion engine, which belongs to the variable valve driving system of the internal combustion engine. Background technique [0002] With the increasingly serious global energy and environmental problems, variable valve technology has attracted extensive attention from internal combustion engine companies and research institutions due to its advantages in energy saving and emission reduction of internal combustion engines. However, most of the existing variable valve drive systems are There is a contradiction between the flexibility of valve adjustment and the complexity of system structure and cost. In the field of research, the most potential is the electro-hydraulic variable valve drive system. However, with the increase in the number of internal combustion engine cylinders, the number of single-cylinder valves and the speed, the common rail oil supply used in ...

AI Technical Summary

Problems solved by technology

However, most of the current auxiliary braking systems have problems such as overheating of braking components, excessive reduction in braking efficiency, low controllability of braking efficiency, easy deviation of the vehicle during braking, and limited vehicle space occupied by the braking system.

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