Dual-fuel injector with isolation groove and injection method thereof

Abstract

The invention relates to the technical field of dual fuel injectors, and discloses a dual fuel injector with isolation grooves and an injection method thereof. The dual-fuel injector with isolation groove includes: a valve body, which is provided with an air intake passage, an oil control inlet passage and an oil control return passage; a nozzle sleeve, which is detachably connected with the valve body and defines a pressure regulating cavity; The pressure regulating assembly is located in the pressure regulating chamber. The pressure regulating assembly includes a nozzle coupling sleeve, which is respectively assembled with the valve body and the nozzle sleeve. The nozzle coupling sleeve is provided with a first isolation groove, a second isolation groove and an oil guide hole. , the second isolation groove communicates with the oil control inlet passage, and when the pressure regulating component abuts against the end of the nozzle sleeve, the air injection hole is isolated from the air intake passage; the oil control valve is arranged on the oil control return passage. The dual-fuel injector with isolation grooves disclosed in the present invention increases the smoothness of the movement of the pressure-regulating assembly, reduces the probability of the pressure-regulating assembly being stuck, reduces the failure rate of the dual-fuel injector, and prolongs the life of the dual-fuel injector. service life.

Description

technical field [0001] The invention relates to the technical field of dual fuel injectors with isolation grooves, in particular to a dual fuel injector with isolation grooves and an injection method thereof. Background technique [0002] The existing dual-fuel injector is generally an injection valve integrating combustible gas and combustible fuel liquid, which can inject combustible fuel liquid or combustible gas into the combustion chamber. Due to the influence of its own structure, most existing dual-fuel injectors have The problem of poor injection effect and short service life, for example, high-temperature carbon deposits will be formed in the regulating oil due to friction and excessive temperature of the valve body, nozzle sleeve and nozzle coupling sleeve, which often occurs during the axial movement of the pressure regulating component Sticking increases the failure rate of dual fuel injection, reduces the injection effect of dual fuel injectors, and shortens the...

AI Technical Summary

Problems solved by technology

[0002] The existing dual-fuel injector is generally an injection valve integrating combustible gas and combustible fuel liquid, which can inject combustible fuel liquid or combustible gas into the combustion chamber. Due to the influence of its own structure, most existing dual-fuel injectors have The problem of poor injection effect and short service life, for example, high-temperature carbon deposits will be formed in the regulating oil due to friction and excessive temperature of the valve body, nozzle sleeve and nozzle coupling sleeve, which often occurs during the axial movement of the pressure regulating component Sticking increases the failure rate of dual fuel injection, reduces the injection effect of dual fuel injectors, and shortens the service life

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