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    • 1. 发明授权
    • Fuel injector for an internal-combustion engine
    • 用于内燃机的燃油喷射器
    • US07255289B2
    • 2007-08-14
    • US11112786
    • 2005-04-21
    • Mario RiccoSisto Luigi De MatthaeisAdriano GorgoglioneMarco Petrachi
    • Mario RiccoSisto Luigi De MatthaeisAdriano GorgoglioneMarco Petrachi
    • F02M47/02F02M59/00F02M39/00B05B1/30
    • F02M63/0015F02M47/027F02M63/0043F02M2547/003
    • A fuel injector (1) for an internal-combustion engine has a shell (2) provided with two opposite terminal portions; the first terminal portion (4) has an inlet (7) for supply of the fuel and is generally designed to extend outside the engine, whilst the second terminal portion (5) has a nozzle (9) communicating with said inlet (7), is designed to be housed in the engine and has, in the radial direction, dimensions smaller than those of the first portion (4); the injector (1) further has an actuator (16) and a servo valve (15) housed in the first terminal portion (4); the servo valve (15) is provided with an open/close element (32), which can slide axially, under the action of the actuator (16) and substantially in a fluid-tight way, in a seat (27) and is subjected to an axial resultant of pressure of the fuel that is substantially zero; the fuel inlet (7) is made laterally in an intermediate axial position between the actuator (16) and the nozzle (9).
    • 一种用于内燃机的燃料喷射器(1)具有设置有两个相对端子部分的壳体(2) 第一端子部分(4)具有用于供应燃料的入口(7),并且通常设计成在发动机外部延伸,而第二端子部分(5)具有与所述入口(7)连通的喷嘴(9) 被设计成容纳在发动机中,并且在径向上具有比第一部分(4)的尺寸更小的尺寸; 喷射器(1)还具有容纳在第一端子部分(4)中的致动器(16)和伺服阀(15)。 所述伺服阀(15)设置有打开/关闭元件(32),所述打开/关闭元件(32)可在所述致动器(16)的作用下在所述座(27)中基本上以流体密封的方式轴向滑动并且被施加 到基本上为零的燃料的压力的轴向结果; 燃料入口(7)在致动器(16)和喷嘴(9)之间的中间轴向位置处横向制成。
    • 2. 发明授权
    • Internal combustion engine fuel injector
    • 内燃机燃油喷射器
    • US07740187B2
    • 2010-06-22
    • US11171659
    • 2005-06-30
    • Mario RiccoSisto Luigi De MatthaeisAdriano GorgoglioneAlfonso Di MeoSergio Stucchi
    • Mario RiccoSisto Luigi De MatthaeisAdriano GorgoglioneAlfonso Di MeoSergio Stucchi
    • F02M41/16
    • F02M63/008F02M47/027F02M63/0015F02M63/004F02M63/0043F02M63/0071F02M63/0073F02M2200/28F02M2547/003
    • An internal combustion engine fuel injector (1) has a rod (10) movable along an axis (3) to open/close a nozzle, and a servovalve (7) having a control chamber (23) with a discharge passage (26, 48) which is opened/closed by a shutter (17) movable axially under the control of an electro-actuator; the servovalve also has a fixed axial rod (33) having an outer lateral surface (34) through which the discharge passage (26, 48) comes out; the shutter (17) is fitted to the axial rod (33) to slide axially in substantially fluidtight manner, and, when closing the discharge passage (26, 48), is subjected to substantially zero resultant axial pressure by the fuel; and a calibrated portion (42, 52) of the discharge passage (26, 48) is formed close to the outlet of the discharge passage to produce swirl and/or cavitation in the fuel outflow near to the closing area between the shutter (17) and the axial rod (33).
    • 一种内燃机燃料喷射器(1)具有可沿轴线(3)移动以打开/关闭喷嘴的杆(10)和具有控制室(23)的伺服阀(7),所述控制室具有排出通道(26,48 ),其由在电致动器的控制下可轴向移动的活门(17)打开/关闭; 所述伺服阀还具有固定的轴向杆(33),所述轴向杆具有外侧表面(34),所述排出通道(26,48)通过所述外侧表面出来; 活门17安装在轴杆33上,以基本上流体密封的方式轴向滑动,当关闭排气通道26,48时,燃料经过基本上为零的轴向压力; 并且排出通道(26,48)的校准部分(42,42)形成在排放通道的出口附近,以在靠近快门(17)之间的关闭区域的燃料流出中产生漩涡和/或空化, 和轴向杆(33)。