Combined type electromagnetic driving full-variable gas distribution mechanism applied to internal combustion engine

Abstract

The invention discloses a combined type electromagnetic driving full-variable gas distribution mechanism applied to an internal combustion engine. The combined type electromagnetic driving full-variable gas distribution mechanism applied to the internal combustion engine comprises a double-acting electromagnet, an electromagnetic linear actuator and an engine valve; the double-acting electromagnetcomprises an electromagnetic end cover, an electromagnetic shell, an electromagnetic coil framework, an electromagnetic coil, an upper permanent-magnet ring, a lower permanent-magnet ring, a magneticconductive ring, moving iron and a connecting rod; the electromagnetic linear actuator comprises an actuator shell, an actuator upper end cover, an actuator iron core, an actuator coil framework, anactuator coil and a permanent magnet; the actuator coil framework is arranged in a clearance formed between the actuator iron core and the permanent magnet, the lower end of the actuator coil framework is connected with the valve, and the upper end of the actuator coil framework is connected with the double-acting electromagnet moving iron and the connecting rod through a connecting plate; and thevalve is collaboratively driven by the double-acting electromagnet and the electromagnetic linear actuator to be opened or closed, and when the valve faces the high in-cylinder gas pressure in the opening process, the double-acting electromagnet and the electromagnetic linear actuator simultaneously work to achieve quick opening of the valve. In addition, the combined type electromagnetic drivingfull-variable gas distribution mechanism applied to the internal combustion engine further has the self-locking capability at the stroke end, and system energy consumption is reduced without keepingcurrents.

Description

technical field [0001] The invention mainly relates to an internal combustion engine technology, in particular to a composite electromagnetically driven fully variable valve mechanism applied to the internal combustion engine. Background technique [0002] Variable gas distribution technology is an important technical means to improve the power, economy and emission performance of internal combustion engines. In a traditional internal combustion engine, the valve phase and lift provided by the camshaft valve train are fixed and can only achieve the best efficiency under certain working conditions. Although the variable valve train based on the camshaft can realize the adjustment of the valve timing or valve lift, it is still constrained by the cam profile, the adjustable range is not large, and the thermal efficiency improvement effect is not obvious. The fully variable valve train cancels the camshaft, directly and individually drives each valve in the form of linear servo...

AI Technical Summary

Problems solved by technology

Among them, the electromagnetically driven valve mechanism based on electromagnetic linear actuator is an easy-to-implement technical route, but when the valve is kept closed or opened, a certain current needs to be applied to maintain its open and closed state, which will lead to system failure. Increased consumption

In addition, when applied to the exhaust system of an internal combustion engine, the electromagnetic drive valve mechanism also faces the problem of insufficient driving force: the gas pressure faced by the exhaust valve opening after combustion will reach 0.6MPa or even higher, which will affect the valve opening speed. It has a great impact, and even cannot be opened in time in severe cases, resulting in deterioration of the performance of the internal combustion engine

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