Bypass piezoelectric outer guide gas spraying valve with floating valve base

Abstract

The invention provides a bypass piezoelectric outer guide gas spraying valve with a floating valve base. A floating valve base structure prevents reverse leakage caused by unbalanced internal and external pressure of the gas spraying valve, and guarantees the working reliability of the gas spraying valve; the intake and guide process is realized through a bypass structure and a guide cavity structure; the control of a valve element, the control of a gas circuit and the gas spraying function of a gas valve are realized through control of a piezoelectric actuator; through matching of an outer guide structure, a pressure balance hole and a pressure balance groove, the perpendicularity of the valve element is guaranteed, the stable work of gas currents is realized, the work is reliable, and the high response speed is realized; through a mixed intake mode of direct intake by an axial main gas groove and intake by a peripheral gas feeding hole, high flow is realized, the gas supply efficiency of an engine is effectively improved, meanwhile, the gas current interference can be prevented, and the gas circuit stability is realized; and through multiple ring belt structures between the valve element and the valve base, the surface sealing of the gas spraying valve is realized, and the reliability is high.

Description

technical field [0001] The invention relates to a gas injection valve, in particular to a gas injection valve for a natural gas engine. Background technique [0002] In recent years, with the rapid growth of my country's oil consumption, oil is heavily dependent on imports. Natural gas burns cleanly and has abundant reserves in my country, making it the most likely fuel to replace diesel. Natural gas engines have good application prospects as ship power, especially as propulsion power for inland watercraft. As a fuel supply device for a natural gas engine, the performance of the gas injection valve directly determines the economy and emission performance of the natural gas engine. At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engi...

AI Technical Summary

Problems solved by technology

At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engine and engine performance

In the case of severe engine operating conditions, the injection valve is prone to reverse leakage

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