公开(公告)号：WO2013113693A2

公开(公告)日：2013-08-08

申请号：PCT/EP2013/051674

申请日：2013-01-29

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

Inventor： MCCRINDLE, Christopher

IPC: F02M59/10

CPC classification number: F02M21/0245 ,  F02M59/102 ,  F02M59/442 ,  F04B1/0421 ,  F04B1/0439 ,  F04B1/0448 ,  F04B53/162

Abstract: A pump head (14) for a high-pressure fuel pump is disclosed. The pump head comprises a head housing including a body portion (24), and a turret portion (30) extending from the body portion (24), a pumping chamber (36) defined within the body portion (24), a pumping element bore (34) for receiving a pumping element (32) in use, the pumping element bore (34) extending from the pumping chamber (36) and through the turret portion (30), and a leakage return passage (74). The pump head (14) further comprises a sleeve (70) arranged around the turret portion (70) to define a leakage flow path (72) to allow fuel flow from the pumping element bore (34) to the leakage return passage (74). The pump head is suitable for use in a fuel pump of the type in which a cam drive arrangement of the pump is lubricated by engine oil, since contamination of the engine oil with fuel can be minimised.

Abstract translation: 公开了一种用于高压燃料泵的泵头（14）。 泵头包括头壳体，其包括主体部分（24）和从主体部分（24）延伸的转台部分（30），限定在主体部分（24）内的泵送室（36），泵送元件孔 （34），用于在使用中接收泵送元件（32），所述泵送元件孔（34）从所述泵送室（36）延伸并且通过所述转台部分（30）和泄漏返回通道（74）。 泵头（14）还包括围绕转台部分（70）布置以限定泄漏流动路径（72）的套筒（70），以允许燃料从泵送元件孔（34）流到泄漏返回通道（74） 。 泵头适用于其中由发动机油润滑泵的凸轮驱动装置的类型的燃料泵，因为能够使燃料的发动机油的污染最小化。