A Compound Electromagnetic Drive Fully Variable Valve Train Applied to Internal Combustion Engines

Abstract

The invention discloses a composite electromagnetically driven fully variable valve mechanism applied to an internal combustion engine, comprising a double-acting electromagnet, an electromagnetic linear actuator and an engine valve; the double-acting electromagnet includes an electromagnet end cover and an electromagnet housing , electromagnet coil skeleton, electromagnet coil, upper permanent magnet ring, lower permanent magnet ring, magnetic conduction ring, moving iron and connecting rod; electromagnetic linear actuator includes actuator shell, actuator upper end cover, actuator Iron core, actuator coil bobbin, actuator coil, permanent magnet; the actuator coil bobbin is set in the gap between the actuator iron core and the permanent magnet, its lower end is connected to the valve, and its upper end is connected to the double-acting electromagnetic through the connecting plate. The iron moving iron and the connecting rod are connected; the valve is opened or closed by the double-acting electromagnet and the electromagnetic linear actuator. Possess self-locking ability at the end of the stroke, no need to hold the current to reduce system energy consumption.

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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