A fully variable electro-hydraulic gas valve driving device

Abstract

The purpose of the present invention is to provide a fully variable electro-hydraulic gas valve driving device, which is composed of high and low pressure oil circuits, internal feedback slide valves, hydraulic actuators, and solenoid valves. The high and low pressure oil circuit includes high pressure oil rail, low pressure oil source, and hydraulic pipeline, which is the power source of the whole device; the internal feedback slide valve is a three-position two-way hydraulic control valve, and the air valve is seated by the automatic closing of the conical valve core. and lift self-locking control; the hydraulic actuator includes three hydraulic chambers, double hydraulic pistons, and return springs, and the high and low pressure oil enters the main hydraulic chamber to realize the air valve movement; the solenoid valve includes two electromagnetic switch valves, one two two three Through the solenoid valve, the continuous and fully variable control of the valve phase, cycle and lift is realized. The invention can perform flexible and fully variable adjustment to the gas distribution parameters of the engine; and has a lower valve seating speed, which greatly reduces the valve seating impact compared with other variable gas distribution devices, and reduces the impact of the engine due to the seating impact. vibration and noise.

Description

technical field [0001] The invention relates to an engine, in particular to a valve train of the engine. Background technique [0002] With the increasingly serious world environmental problems and the international energy crisis, which has seriously threatened the sustainable development of human society, countries all over the world have higher and higher requirements for improving the economy of engines and controlling harmful emissions, saving fuel and controlling harmful emissions. , has become the core direction of engine technology development. Changing the valve timing and valve lift of engine valves is an important way to improve engine performance, increase thermal efficiency and reduce harmful emissions. However, the traditional engine valve drive system uses a mechanical cam mechanism to control the intake and exhaust valves. Since the cam profile is fixed, its valve lift, valve timing and other gas distribution parameters are fixed and cannot be controlled. Ad...

AI Technical Summary

Problems solved by technology

However, the traditional engine valve drive system uses a mechanical cam mechanism to control the intake and exhaust valves. Since the cam profile is fixed, its valve lift, valve timing and other gas distribution parameters are fixed and cannot be controlled. Tuning while the engine is running usually only guarantees optimum engine performance under certain operating conditions

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