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    • 3. 发明专利
    • Fuel injection device
    • 燃油喷射装置
    • JP2011169168A
    • 2011-09-01
    • JP2010031583
    • 2010-02-16
    • Zama Japan Co Ltdザマ・ジャパン株式会社
    • NONAKA TAKUMIWATANABE HIDEKI
    • F02M37/20F02M37/00F02M37/12F02M37/16F02M59/44
    • F02M37/0052F02M37/0023F02M55/02F02M55/04F02M57/02F02M57/026F02M59/14
    • PROBLEM TO BE SOLVED: To allow smooth discharge of a gas accumulated in a fuel injection device, in a fuel injection device for injecting/supplying fuel to an engine intake passage. SOLUTION: A fuel injection device 3A includes a fuel pump 31, a solenoid valve 32 for injecting pressurized fuel into the intake passage 10 of an engine 1, a high-pressure fuel passage 36 that extends from the fuel pump 31 to the solenoid valve 32 and has a medially positioned constant-pressure chamber 33A, and a fuel return passage 38 connected to a fuel return pipe 6, and extending from the constant-pressure chamber 33A and having a medially positioned priming pump 34A, wherein the constant-pressure chamber 33A is configured so that the top wall in the upper space thereof is disposed above the opening of the high-pressure fuel passage 36 extending to the solenoid valve 32, the fuel return passage 38 opens into the upper space at a position above the opening of the high-pressure fuel passage 36, and the gas accumulating in the constant-pressure chamber 33A is discharged from the upper space toward the fuel tank 2 via the fuel return passage 38. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了在燃料喷射装置中积聚的气体的平稳排放,在用于向发动机进气通道喷射/供给燃料的燃料喷射装置中。 解决方案:燃料喷射装置3A包括燃料泵31,用于将加压燃料喷射到发动机1的进气通道10中的电磁阀32,从燃料泵31延伸到高压燃料通道36的高压燃料通道36 电磁阀32并具有中间定位的恒压室33A和连接到燃料返回管6的燃料返回通道38,并且从恒压室33A延伸并具有中间定位的启动泵34A, 压力室33A被构造成使得其上部空间中的顶壁设置在延伸到电磁阀32的高压燃料通道36的开口上方,燃料返回通道38在上方的空间上方开口 打开高压燃料通道36,积存在恒压室33A中的气体经由燃料返回通道38从上部空间朝向燃料箱2排出。(C)2011,JPO&INPIT
    • 5. 发明专利
    • Injector
    • 注射器
    • JP2007247564A
    • 2007-09-27
    • JP2006073196
    • 2006-03-16
    • Denso CorpNippon Soken Inc株式会社デンソー株式会社日本自動車部品総合研究所
    • HORIUCHI YASUHIROMIYAMOTO YUTAKA
    • F02M47/00
    • F02M57/025F02M47/025F02M57/026F02M63/0029F02M63/0047
    • PROBLEM TO BE SOLVED: To secure both oil-tightness and slidability, in a boosting mechanism 4 of an injector 1. SOLUTION: The boosting mechanism 4 has a cylindrical piston 23 penetrating in the axial direction, and a bar-shaped piston 25 loosely inserted into the cylindrical piston 23 and having a tip part 24 projecting to the tip side from the cylindrical piston 23 and engaging with the cylindrical piston 23. Thus, since the cylindrical piston 23 and the bar-shaped piston 25 move by mutually engaging, even if large diameter side and small diameter side sliding clearances are set small for securing the oil-tightness, restriction received to one from the other is weak when the cylindrical piston 23 and the bar-shaped piston 25 move. Thus, independency becomes high in the moving direction of the cylindrical piston 23 and the moving direction of the bar-shaped piston 25, and risk of causing sliding failure is reduced in the tip part 24 of the cylindrical piston 23 and the bar-shaped piston 25. Thus, both the oil-tightness and slidability can be secured in the boosting mechanism 4 of the injector 1. COPYRIGHT: (C)2007,JPO&INPIT
    • 解决方案:在喷射器1的升压机构4中确保油密性和滑动性。解决方案:升压机构4具有沿轴向穿透的圆柱形活塞23和杆 形状的活塞25松动地插入到圆柱形活塞23中,并且具有从圆柱形活塞23突出到尖端侧并与圆柱形活塞23接合的尖端部分24.因此,由于圆柱形活塞23和条形活塞25移动 通过相互接合,即使大直径侧面和小直径侧滑动间隙被设定得小以确保油密性,当圆柱形活塞23和条形活塞25移动时,彼此接收的限制也是较弱的。 因此,圆柱形活塞23的移动方向和条形活塞25的移动方向的独立性变高,并且在圆柱形活塞23的顶端部分24和杆形活塞中减小了引起滑动故障的风险 因此,可以在喷射器1的增压机构4中确保油密性和滑动性。版权所有(C)2007,JPO&INPIT