High-pressure fuel pump

Patent metadata

Field	Value
Publication number	US-2018306151-A1
Application number	US-201615770426-A
Country	US
Kind code	A1
Filing date	Oct 5, 2016
Priority date	Oct 28, 2015
Publication date	Oct 25, 2018
Grant date	—

Abstract

The invention relates to a high-pressure fuel pump (1), in particular of a common rail injection system of an internal combustion engine, having a pump cylinder head (3), having an intake valve (6) arranged in the pump cylinder head (3) in the direction of a pump cylinder axis, and a high-pressure fuel outlet (5) arranged laterally on the pump cylinder head (3), wherein a protective cap (10, 10a) at least partly covering the high-pressure fuel pump (1) is provided. According to the invention, a high-pressure fuel pump (1) having a protective cap (10, 10a) is provided, in which the protective cap (10, 10a) can be mounted without difficulty on an assembled high-pressure fuel pump (1). This is achieved in that a plug (8) having a lateral lead connection (9) is placed on the electrically operated intake valve (6), and the protective cap (10) is formed in two pieces and has two protective cap parts (11a, 11b) that can be fitted to each other, or else in that a plug (8) having a lateral lead connection (9) is placed on the electrically operated intake valve (6), and the protective cap (10a) is formed annularly and has a free clearance slot (19) interrupting the ring.

First claim

1 . A high-pressure fuel pump ( 1 ), comprising
a pump cylinder head ( 3 ), a suction valve ( 6 ) arranged in a direction of a pump cylinder axis in the pump cylinder head ( 3 ), a high-pressure fuel outlet ( 5 ) arranged laterally on the pump cylinder head ( 3 ), and a protective cap ( 10 ) which at least partially covers the high-pressure fuel pump ( 1 ), wherein an electrical plug ( 8 ) with a lateral line connector ( 9 ) is mounted onto the electrically actuated suction valve ( 6 ), and wherein the protective cap ( 10 ) is formed in two parts and has first and second protective cap parts ( 11 b, 11 a ).

2 . The high-pressure fuel pump ( 1 ) as claimed in claim 1 ,
characterized in that the first protective cap part ( 11 a, 11 b ) has a recess ( 13 ) which surrounds the high-pressure fuel outlet ( 5 ).

3 . The high-pressure fuel pump ( 1 ) as claimed in claim 1 ,
characterized in that the first protective cap part ( 11 a, 11 b ) has a detent hook ( 14 ) which can be joined together with a detent groove ( 15 ) of the second protective cap part ( 11 b, 11 a ).

4 . The high-pressure fuel pump ( 1 ) as claimed in claim 1 characterized in that the first and second protective cap parts ( 11 a, 11 b ) are connected by means of a hinge.

5 . The high-pressure fuel pump ( 1 ) as claimed in claim 1 ,
characterized in that at least one protective cap parts ( 11 a, 11 b ) has a domed projection ( 17 ) which extends in a direction of the electrical plug ( 8 ).

6 . A high-pressure fuel pump ( 1 ), comprising
a pump cylinder head ( 3 ), a suction valve ( 6 ) arranged in a direction of a pump cylinder axis in the pump cylinder head ( 3 ), a high-pressure fuel outlet ( 5 ) arranged laterally on the pump cylinder head ( 3 ), and a ring-shaped protective cap ( 10 a ) which at least partially covers the high-pressure fuel pump ( 1 ), wherein an electrical plug ( 8 ) with a lateral line connector ( 9 ) is mounted onto the electrically actuated suction valve ( 6 ), and wherein the protective cap ( 10 a ) has a clearance slot ( 19 ) which interrupts the ring-shaped protective cap ( 10 a ).

7 . The high-pressure fuel pump ( 1 ) as claimed in claim 6 ,
characterized in that the clearance slot ( 19 ) has a contour which surrounds the high-pressure fuel outlet ( 5 ).

8 . The high-pressure fuel pump ( 1 ) as claimed in claim 6 ,
characterized in that the protective cap ( 10 a ) has clamping lugs ( 20 ) which adjoin the clearance slot ( 19 ) and which interact with a clamping ring ( 21 ).

9 . The high-pressure fuel pump ( 1 ) as claimed in claim 8 ,
characterized in that the clamping ring ( 21 ) has a covering lug ( 22 ) for at least partially covering the clearance slot ( 19 ).

10 . The high-pressure fuel pump ( 1 ) as claimed in claim 6 ,
characterized in that the protective cap ( 10 a ) has a domed projection which extends in a direction of the electrical plug ( 8 ).

11 . The high-pressure fuel pump ( 1 ) as claimed in claim 1 , characterized in that the first and second protective cap parts ( 11 a, 11 b ) are connected by a film hinge ( 23 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Laepple Karl-Heinz
• Lucarelli Francesco
• Linden Dietmar Van Der

Classifications

• F02M53/00

  Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means · CPC title

• F02M59/366

  Valves being actuated electrically · CPC title

• F02M2200/9015

  Elastomeric or plastic materials · CPC title

• F02M2200/09

  Fuel-injection apparatus having means for reducing noise · CPC title

• F02M2200/05

  Fuel-injection apparatus having means for preventing corrosion · CPC title