A composite gas-liquid two-phase mixed fuel injector

Abstract

The composite gas-liquid two-phase mixed fuel injector aims to solve the problems of poor sealing effect and poor atomization state of the existing new energy methanol fuel intake manifold injection by blocking the corrosive liquid such as methanol in the front end of the injector and adopting a multi-stage injection scheme during injection. The composite gas-liquid two-phase mixed fuel injector comprises a first-stage injector and a second-stage injector, which are connected in series; the first-stage injector is provided with a liquid fuel inlet, and a first valve core is arranged in the first-stage injector; the first-stage injector is used for spraying the liquid fuel entering through the liquid fuel inlet in the form of a jet and making the jet impact the first valve core or an impact surface in the second-stage injector, so as to realize the first atomization of the liquid fuel; the second-stage injector is provided with a gas inlet, and a mixing cavity is formed in the second-stage injector and communicates with the gas inlet; the output end of the first-stage injector communicates with the mixing cavity of the second-stage injector, so that the liquid fuel after the first atomization and the gas from the gas inlet are mixed in the mixing cavity and realize the second atomization, form a gas-liquid mixed state, and then the second-stage injector sprays the gas-liquid mixed state.

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