Injection nozzle, fuel injector having injection nozzle

Patent metadata

Field	Value
Publication number	US-2024175415-A1
Application number	US-202218551669-A
Country	US
Kind code	A1
Filing date	Feb 16, 2022
Priority date	Mar 22, 2021
Publication date	May 30, 2024
Grant date	—

Abstract

The invention relates to an injection nozzle (1) for injecting a fluid, in particular a liquid or gaseous fuel, comprising:a nozzle body (2) which is designed to be hollow-cylindrical at least in portions and forms a sealing seat (3) via which a flow path (4) for the fluid to be injected leads,a nozzle needle (5) which is accommodated in the nozzle body (2) for reciprocating movement and has a sealing surface (6) that interacts with the sealing seat (3),a guide element (7) which is fixedly connected to the nozzle needle (5) and is guided by means of an external guide (8) of the nozzle body (2).The invention further relates to a fuel injector having an injection nozzle (1) according to the invention.

First claim

1 . An injection nozzle ( 1 ) for injecting a fluid, the injection nozzle comprising:
a nozzle body ( 2 ) which is configured to be hollow-cylindrical at least in portions and forms a sealing seat ( 3 ) via which a flow path ( 4 ) for the fluid to be injected leads, a nozzle needle ( 5 ) which is accommodated in the nozzle body ( 2 ) for reciprocating movement and has a sealing surface ( 6 ) that interacts with the sealing seat ( 3 ), wherein
the nozzle needle ( 5 ) is fixedly connected to a guide element ( 7 ) which is guided by an external guide ( 8 ) of the nozzle body ( 2 ).

2 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the external guide ( 8 ) and the flow path ( 4 ) are spatially separated by the nozzle body ( 2 ).

3 . The injection nozzle ( 1 ) according to claim 1 ,
wherein an outer peripheral area of the nozzle body ( 2 ) forms the external guide ( 8 ), and the guide element ( 7 ) surrounds the outer peripheral area of the nozzle body ( 2 ).

4 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the guide element ( 7 ) comprises a central recess ( 9 ) in which an end portion ( 10 ) of the nozzle needle ( 5 ) is accommodated.

5 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the guide element ( 7 ) delimits a flow chamber ( 11 ) and comprises at least one opening ( 12 ) for discharging the fluid from the flow chamber ( 11 ).

6 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the sealing seat ( 3 ) and/or the sealing surface ( 6 ) that interacts with the sealing seat ( 3 ) is/are conically shaped.

7 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the sealing surface ( 6 ) is formed on a portion ( 13 ) of the nozzle needle ( 5 ) that has an enlarged outer diameter.

8 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the nozzle needle ( 5 ) opens outwards.

9 . The injection nozzle ( 1 ) according to claim 1 ,
wherein the nozzle needle ( 5 ) opens inwards.

10 . A fuel injector having an injection nozzle ( 1 ) according to claim 1 .

11 . The injection nozzle ( 1 ) according to claim 1 , wherein the fluid is a liquid or gaseous fuel.

12 . The injection nozzle ( 1 ) according to claim 4 , wherein the end portion ( 10 ) of the nozzle needle ( 5 ) is configured as a pin.

Assignees

• Bosch Gmbh Robert

Inventors

• Leukart Michael
• Nicolai Ferdinand

Classifications

• F02M61/12 Primary

  characterised by the provision of guiding or centring means for valve bodies · CPC title

• F02M61/1886

  Details of valve seats not covered by groups F02M61/1866 - F02M61/188 · CPC title

• F02M61/06 Primary

  the valves being furnished at seated ends with pintle or plug shaped extensions · CPC title

• F02M61/045

  The valves being provided with fuel discharge orifices · CPC title

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title