公开(公告)号：US09494121B2

公开(公告)日：2016-11-15

申请号：US14372227

申请日：2013-01-31

Applicant: DELPHI INTERNATIONAL OPERATIONS LUXEMBOURG, S.A.R.L.

Inventor： George Nicholas Felton

IPC: F02M69/02 ,  F02M59/10

CPC classification number: F02M69/02 ,  F02M59/102

Abstract: A fuel pump assembly comprises a pumping plunger for pressurizing fuel within a pumping chamber during a plunger pumping stroke; and a cam follower arrangement for imparting drive to the pumping plunger including a cam follower member which cooperates with the pumping plunger. The cam follower arrangement is biased into engagement with a cam drive while a degree of relative movement along the plunger axis is permitted between the cam follower member and the pumping plunger. At least one of the pumping plunger and the cam follower member includes a surface provided with a feature which defines together with a facing surface of the other of the pumping plunger and the cam follower member, a cushioning volume therebetween for receiving fluid to provide a cushioning effect as the pumping plunger and the cam follower member move into contact with one another, in use. The feature includes a flat central portion and an annular region which is conical in form and which is angled relative to the facing surface.

Abstract translation: 燃料泵组件包括用于在柱塞泵送冲程期间对泵送室内的燃料加压的泵送柱塞; 以及用于对泵送柱塞进行驱动的凸轮从动装置，包括与泵送柱塞配合的凸轮从动件。 凸轮从动件装置被偏置成与凸轮驱动器接合，同时在凸轮从动件和泵送柱塞之间允许沿着柱塞轴线的一定程度的相对运动。 泵送柱塞和凸轮从动件中的至少一个包括设置有与泵送柱塞和凸轮从动件的另一个的相对表面一起限定的特征的表面，其间用于接收流体的缓冲体积以提供缓冲 在使用中，抽吸柱塞和凸轮从动件的作用相互接触。 该特征包括平坦的中心部分和环形区域，其形状为圆锥形并且相对于相对表面成角度。

公开(公告)号：US20140366849A1

公开(公告)日：2014-12-18

申请号：US14372227

申请日：2013-01-31

Applicant: DELPHI INTERNATIONAL OPERATIONS LUXEMBOURG, S.A.R.L

Inventor： George Nicholas Felton

IPC: F02M69/02

CPC classification number: F02M69/02 ,  F02M59/102

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

Abstract translation: 燃料泵组件包括用于在柱塞泵送冲程期间对泵送室内的燃料加压的泵送柱塞; 以及用于对泵送柱塞进行驱动的凸轮从动装置，包括与泵送柱塞配合的凸轮从动件。 凸轮从动件装置被偏置成与凸轮驱动器接合，同时在凸轮从动件和泵送柱塞之间允许沿着柱塞轴线的一定程度的相对运动。 泵送柱塞和凸轮从动件中的至少一个包括设置有与泵送柱塞和凸轮从动件的另一个的相对表面一起限定的特征的表面，其间用于接收流体的缓冲体积以提供缓冲 在使用中，抽吸柱塞和凸轮从动件的作用相互接触。 该特征包括平坦的中心部分和环形区域，其形状为圆锥形且相对于相对表面成角度。