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Invention Application
WO2009065761A1 SAFETY VALVE AND HIGH-PRESSURE PUMP COMPRISING SAID SAFETY VALVE 审中-公开
安全阀和包含安全阀的高压泵

SAFETY VALVE AND HIGH-PRESSURE PUMP COMPRISING SAID SAFETY VALVE
Abstract:
A fuel safety valve arranged in a fuel supply line (7) between a low-pressure pump and a high-pressure pump (2), is provided with: a valve body (40) which defines a cylindrical cavity (41) having a longitudinal axis (A) and being connected to a duct (30), and a portion (42) of a discharge duct (33) in communication with the cylindrical cavity (41); a piston (44) sliding with respect to the valve body (40) in the cylindrical cavity (41) along the longitudinal axis (A); and a spring (46) housed in a variable-volume chamber (49) defined by a portion of the cylindrical cavity (41) between the piston (44) and a closure element (47); the piston (44) being provided with a through hole (52) supplied with the fuel leading into the variable-volume chamber (49), and the valve body (40) being provided with a fuel discharge hole (56) connecting the variable-volume chamber (49) to the discharge duct (33).
Abstract(Chinese):

设置在低压泵和高压泵（2）之间的燃料供应管线（7）中的燃料安全阀设置有：阀体（40），其限定具有纵向 （A）连接并连接到管道（30）和与圆柱形空腔（41）连通的排放管道（33）的部分（42）; 沿所述纵向轴线（A）在所述圆柱形空腔（41）中相对于所述阀体（40）滑动的活塞（44）; 以及弹簧（46），其容纳在由活塞（44）和封闭元件（47）之间的圆柱形空腔（41）的一部分限定的可变容积室（49）中; 所述活塞（44）设置有供给通向所述可变容积室（49）的燃料的通孔（52），所述阀体（40）设置有燃料排出孔（56） （49）连接到排放管道（33）。

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