公开(公告)号：WO2013117485A1

公开(公告)日：2013-08-15

申请号：PCT/EP2013/051943

申请日：2013-01-31

Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L.

Inventor： FELTON, George, Nicholas

IPC: F02M59/10

CPC classification number: F02M69/02 ,  F02M59/102

Abstract: There is provided a fuel pump assembly for use in an internal combustion engine. The fuel pump assembly comprises a pumping plunger (16) for pressurising fuel within a pumping chamber (32) during a plunger pumping stroke; and a cam follower arrangement (18, 20) for imparting drive to the pumping plunger (16) including a cam follower member (18) which cooperates with the pumping plunger (16). The cam follower arrangement (18, 20) is biased into engagement with a cam drive (22, 26) whilst a degree of relative movement along the plunger axis is permitted between the cam follower member (18) and the pumping plunger (16). At least one of the pumping plunger (16) and the cam follower member (18) includes a surface provided with a feature which defines together with a facing surface of the other of the pumping plunger (16) and the cam follower member (18), a cushioning volume (44) there between for receiving fluid to provide a cushioning effect as the pumping plunger (16) and the cam follower member (18) move into contact with one another, in use. The feature includes a flat central portion (40) and an annular region (42) which is conical in form and which is angled relative to the facing surface.

Abstract translation: 提供了一种用于内燃机的燃料泵组件。 燃料泵组件包括用于在柱塞泵送冲程期间对泵送室（32）内的燃料加压的泵送柱塞（16） 以及用于对泵送柱塞（16）施加驱动的凸轮从动装置（18,20），包括与泵送柱塞（16）配合的凸轮从动件（18）。 凸轮从动件装置（18,20）被偏置成与凸轮驱动器（22,26）接合，同时在凸轮从动件（18）和泵送柱塞（16）之间允许沿着柱塞轴线的一定程度的相对运动。 泵送柱塞（16）和凸轮从动件（18）中的至少一个包括设置有与泵送柱塞（16）和凸轮从动件（18）中的另一个的相对表面一起限定的特征的表面， ，其间的缓冲体积（44）用于在使用中接收流体以提供缓冲作用，因为泵送柱塞（16）和凸轮从动构件（18）彼此接触。 该特征包括平坦的中心部分（40）和环形区域（42），该环形区域形状为圆锥形且相对于相对表面成角度。