公开(公告)号：US20150017035A1

公开(公告)日：2015-01-15

申请号：US14375454

申请日：2013-01-29

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

Inventor： Christopher McCrindle

IPC: F02M21/02

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

Abstract: A pump head for a high-pressure fuel pump is disclosed. The pump head comprises a head housing including a body portion, and a turret portion extending from the body portion, a pumping chamber defined within the body portion, a pumping element bore for receiving a pumping element in use, the pumping element bore extending from the pumping chamber and through the turret portion, and a leakage return passage. The pump head further comprises a sleeve arranged around the turret portion to define a leakage flow path to allow fuel flow from the pumping element bore to the leakage return passage. 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。 泵头包括头壳体，其包括主体部分和从主体部分延伸的转台部分，限定在主体部分内的泵送室，用于在使用中接收泵送元件的泵送元件孔， 泵送室并通过转台部分和泄漏返回通道。 泵头还包括围绕转台部分布置的套筒，以限定泄漏流动路径，以允许燃料从泵送元件孔流向泄漏返回通道。 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。