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    • 1. 发明授权
    • High-pressure fuel pump
    • 高压燃油泵
    • US06789459B2
    • 2004-09-14
    • US10257714
    • 2002-10-16
    • Masaaki SanoKazuhiro AsayamaHiroshi Inoue
    • Masaaki SanoKazuhiro AsayamaHiroshi Inoue
    • F16J1518
    • F02M59/44F02M59/102F02M59/442F04B53/164F04B2201/0208
    • A high pressure fuel pump includes a cylinder having a pressurizing chamber and a plunger inserted into the cylinder. The plunger is axially reciprocated by a lifter to pressurize fuel in the pressurizing chamber. A seal member encompasses a portion of the plunger that is projected from the cylinder. The seal member disconnects a cylinder side space surrounded by the seal member from a lifter side space outside the seal member. The seal member has an annular lip portion that contacts a peripheral surface of the plunger, and the annular lip portion has a pair of lips separated from each other in an axial direction of the plunger. An axial distance between the lips is greater than a stroke of the plunger. As a result, fuel does not enter the lifter side space, and lubricating oil does not enter the cylinder side space.
    • 高压燃料泵包括具有加压室和插入气缸中的柱塞的气缸。 柱塞由提升器轴向往复运动,以对加压室中的燃料加压。 密封构件包括从气缸突出的柱塞的一部分。 密封构件将由密封构件包围的气缸侧空间与密封构件外侧的升降器侧空间断开。 密封构件具有与柱塞的周面接触的环形唇部,并且环形唇部具有在柱塞的轴向上彼此分离的一对唇缘。 嘴唇之间的轴向距离大于柱塞的行程。 结果,燃料不进入升降器侧空间,润滑油不会进入气缸侧空间。
    • 5. 发明授权
    • High pressure pump
    • 高压泵
    • US06554590B2
    • 2003-04-29
    • US09837249
    • 2001-04-18
    • Tomoyuki MaedaKazuhiro AsayamaTomoji IshikawaHiroshi Inoue
    • Tomoyuki MaedaKazuhiro AsayamaTomoji IshikawaHiroshi Inoue
    • F04B3908
    • F02M63/0225F02M59/368F04B53/162F04B53/166
    • A high pressure pump includes a cylinder body. The cylinder body has a cylinder and a valve recess communicated with the cylinder. A cover is attached to the cylinder body to surround the valve recess. A plunger reciprocates in the cylinder. An electromagnetic valve has a pressurizing chamber, a valve hole connected to the pressurizing chamber and a valve body. The valve body selectively opens and closes the valve hole. The electromagnetic valve is fixed to the cover. When fluid is pressurized in the pressurizing chamber, the valve hole is closed by the valve body and the plunger enters the pressurizing chamber. A seal ring is located between an outer surface of the electromagnetic valve and an inner surface of the valve recess. The seal ring seals the pressurizing chamber. This reliably seals a pressurizing chamber and improves the displacement efficiency.
    • 高压泵包括缸体。 缸体具有与气缸连通的气缸和阀门凹槽。 盖体连接到缸体以围绕阀门凹部。 柱塞在气缸中往复运动。 电磁阀具有加压室,与加压室连接的阀孔和阀体。 阀体选择性地打开和关闭阀孔。 电磁阀固定在盖子上。 当流体在加压室中被加压时,阀孔被阀体关闭,柱塞进入加压室。 密封环位于电磁阀的外表面和阀凹部的内表面之间。 密封环密封加压室。 这可靠地密封加压室并提高排量效率。