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Tappet for a fuel pump

机译:燃油泵挺杆

摘要

Tappet 22 for a high pressure pump (10, figure 1) of a fuel injection system of an internal combustion engine is arranged between a plunger (18) and roller (24) following a rotating cam. The tappet has a cylindrical peripheral wall 26 extending along a longitudinal axis L from a first end 28 cooperating with the plunger and a second end 30 provided with diametrically opposed roller openings 32, 34 for arranging the roller and wherein. The tappet is adapted to slide in a bore (14) before an opening (40) of a lubricant conduit (42) and is provided with a roller lubrication path 44 for enabling oil exiting the conduit to flow off conduit opening. The lubrication path comprises a first jet hole (46) drilled through the tappet peripheral wall 26 from an outer 36 to an inner face 38 and arranged in the vicinity of a roller opening. A groove 48 in the outer face extends from the jet hole to a place that faces the conduit opening. The groove being configured to enable permanent oil flow regardless of the plunger position. A high pressure pump is also claimed.
机译:用于内燃发动机的燃料喷射系统的高压泵(图1,图1)的挺杆22在旋转凸轮之后布置在柱塞(18)和辊(24)之间。挺杆具有圆柱状的周壁26,该圆柱状的周壁26从与柱塞配合的第一端部28沿着纵轴L延伸,第二端部30设置有沿直径方向相对的用于布置辊子的辊子开口32、34。挺杆适于在润滑剂导管(42)的开口(40)之前在孔(14)中滑动,并且设有用于使离开导管的油从导管开口流出的滚子润滑路径44。润滑路径包括第一喷射孔(46),该第一喷射孔(46)从外表面(36)穿过挺杆外围壁(26)钻至内表面(38),并且布置在辊子开口附近。外表面上的凹槽48从喷射孔延伸到面对导管开口的位置。凹槽配置为无论柱塞位置如何均能使油永久流动。还要求保护高压泵。

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