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Invention Application
WO2013063023A1 DUAL FUEL INJECTOR WITH HYDRAULIC LOCK SEAL AND LIQUID LEAK PURGE STRATEGY 审中-公开
液压油封双液燃油喷射器和液体渗漏策略

DUAL FUEL INJECTOR WITH HYDRAULIC LOCK SEAL AND LIQUID LEAK PURGE STRATEGY
Abstract:
A dual fuel system (10) includes a dual fuel injector (12) defining a gaseous fuel inlet (48), a gaseous nozzle outlet set (90), a liquid fuel inlet (57) and a liquid nozzle outlet set (96). The dual fuel injector (12) has disposed therein a gaseous nozzle chamber (91) fluidly connected to the gaseous fuel inlet (48), and a liquid nozzle chamber (99) fluidly connected to the liquid fuel inlet (57). The dual fuel injector (12) also includes a hydraulic lock seal (93) with an annular volume (191) of liquid fuel surrounding a guide segment (74) of a gas needle valve member (73) for inhibiting migration of gaseous fuel into the liquid fuel. A gaseous fuel common rail (16) fluidly is connected to the gaseous fuel inlet (48), and a liquid fuel common rail (14) is fluidly connected to the liquid fuel inlet (57). A check valve (18) is fluidly positioned between the gaseous fuel common rail (16) and the gaseous nozzle chamber (91) of the dual fuel injector (12) for blocking liquid fuel leaked into the gaseous nozzle chamber (91) through the hydraulic lock seal (93) from entering the gaseous fuel common rail (16).
Abstract(Chinese):

双燃料系统（10）包括限定气体燃料入口（48），气体喷嘴出口组（90），液体燃料入口（57）和液体喷嘴出口组（96）的双燃料喷射器（12）。 双燃料喷射器（12）在其中设置有流体连接到气体燃料入口（48）的气体喷嘴室（91）和与液体燃料入口（57）流体连接的液体喷嘴室（99）。 双燃料喷射器（12）还包括液压锁定密封件（93），其具有围绕气体针阀构件（73）的引导段（74）的液体燃料的环形容积（191），用于阻止气体燃料进入 液体燃料。 气体燃料共轨（16）流体地连接到气体燃料入口（48），液体燃料共轨（14）流体地连接到液体燃料入口（57）。 止回阀（18）流体地定位在气体燃料共轨（16）和双燃料喷射器（12）的气体喷嘴室（91）之间，用于通过液压来阻止泄漏到气体喷嘴室（91）中的液体燃料 锁定密封件（93）不进入气体燃料共轨（16）。

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