Jet pump for delivering fuel

Patent metadata

Field	Value
Publication number	US-9546670-B2
Application number	US-201214115419-A
Country	US
Kind code	B2
Filing date	Mar 6, 2012
Priority date	May 4, 2011
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

In a jet pump ( 22 ) for delivering fuel for a vehicle, a pre-filter for a nozzle ( 30 ) is formed in that a duct ( 47, 50 ) is formed between the nozzle ( 30 ) and a receptacle ( 36 ) for the nozzle in a pump body, the diameter of which duct is smaller than a diameter of a nozzle opening of the nozzle ( 30 ).

First claim

The invention claimed is:

1. A jet pump ( 22 ) for delivering fuel, the jet pump comprising:
a pump body ( 28 ) having a supply line ( 20 ) through which pressurized fuel enters the pump body ( 28 ), and
a nozzle ( 30 ) having a nozzle opening ( 42 ) and an interior that opens into the nozzle opening ( 42 ), the nozzle ( 30 ) is arranged in a receptacle ( 36 ) in the pump body ( 28 ) and can be supplied with fuel via the supply line ( 20 ), wherein the receptacle ( 36 ) of the pump body ( 28 ) extends in an axial direction, the supply line ( 20 ) communicates with the receptacle ( 36 ), and a pre-filter is provided upstream of the nozzle ( 30 ),
characterized in that the pre-filter for the nozzle ( 30 ) is defined by a duct having at least one gap that is formed between the nozzle ( 30 ) and the receptacle ( 36 ), the duct communicating with the interior of the nozzle ( 30 ), wherein fuel from the supply line ( 20 ) flows through the gap in an opposite direction to flow through the interior of the nozzle, the gap having a dimension (d 2 ) in a radial direction that is smaller than a diameter of the opening ( 42 ) of the nozzle ( 30 ).

2. The jet pump ( 22 ) as claimed in claim 1 , wherein the nozzle ( 30 ) has an annular wall ( 46 ) and a cover ( 40 ) that defines the nozzle opening ( 42 ), wherein the nozzle ( 30 ) with the annular wall ( 46 ) is arranged in the receptacle ( 36 ), wherein the duct is formed between an outside of the annular wall ( 46 ) and the receptacle ( 36 ) in the pump body ( 28 ).

3. The jet pump ( 22 ) as claimed in claim 1 , wherein the pump body ( 28 ) has a mandrel ( 48 ) which protrudes into an annular wall ( 46 ) of the nozzle ( 30 ).

4. The jet pump ( 22 ) as claimed in claim 3 , wherein the duct further extends between an inside of the annular wall ( 46 ) and the mandrel ( 48 ).

5. The jet pump ( 22 ) as claimed in claim 1 , wherein the duct surrounds the nozzle ( 30 ).

6. The jet pump ( 22 ) as claimed in claim 1 , wherein ribs ( 58 , 60 ) are arranged in the duct.

7. The jet pump ( 22 ) as claimed in claim 6 , wherein the ribs ( 58 ) are formed integrally with the nozzle ( 30 ).

8. The jet pump ( 22 ) as claimed in claim 6 , wherein the ribs are formed integrally with the receptacle.

9. The jet pump ( 22 ) as claimed in claim 6 , wherein the ribs ( 60 ) are mounted on an outside of a mandrel ( 48 ) protruding into the receptacle ( 36 ).

10. The jet pump ( 22 ) as claimed in claim 9 , wherein the ribs are formed integrally with the receptacle.

11. The jet pump ( 22 ) as claimed in claim 1 , wherein the pump body ( 28 ) is formed in a wall of a fuel reservoir ( 14 ).

12. The jet pump ( 22 ) as claimed in claim 1 , wherein at least one of the pump body ( 28 ) and the nozzle ( 30 ) is formed integrally.

13. The jet pump ( 22 ) as claimed in claim 1 , wherein a portion of the duct surrounds a mandrel ( 48 ), which protrudes into the nozzle ( 30 ).

14. The jet pump ( 22 ) as claimed in claim 13 , wherein a portion of the duct surrounds the nozzle ( 30 ).

Assignees

• Malec Radek
• Bosch Gmbh Robert

Inventors

• Malec Radek

Classifications

• F04F5/46 Primary

  Arrangements of nozzles · CPC title

• F04F5/10

  displacing liquids, e.g. containing solids, or liquids and elastic fluids · CPC title

• F02M2037/225

  Mechanical Engineering · mapped topic

• F04F5/42

  characterised by the input flow of inducing fluid medium being radial or tangential to output flow (cyclones B04C) · CPC title

• F02M37/025 Primary

  Feeding by means of a liquid fuel-driven jet pump (jet pumps per se F04F) · CPC title