Fuel injection arrangement and a hydrogen internal combustion engine

Patent metadata

Field	Value
Publication number	US-12473877-B2
Application number	US-202118720133-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Dec 17, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A fuel injection arrangement admits a flow of hydrogen into a combustion chamber of hydrogen internal combustion engine. The fuel injection arrangement has a nozzle cap and an inlet valve arrangement. An inner surface of the nozzle cap comprises a nozzle protrusion protruding radially towards an envelope surface of a flow guiding portion of the inlet valve arrangement. The nozzle protrusion is arranged axially between a valve protrusion of the inlet valve arrangement and an outlet of the nozzle cap. The valve protrusion and the nozzle protrusion at least partly overlap in a radial direction.

First claim

The invention claimed is:

1 . A fuel injection arrangement for admitting a flow of hydrogen into a combustion chamber of a hydrogen internal combustion engine, the fuel injection arrangement comprising:
a nozzle cap comprising an inlet arranged at a valve seat and configured to receive a flow of hydrogen, and at least one outlet at a lower portion of the nozzle cap through which the flow of hydrogen is configured to be supplied into the combustion chamber, an inlet valve arrangement at least partly housed by the nozzle cap, the inlet valve arrangement being movable between a closed position at which a portion of the inlet valve arrangement is arranged in abutment with the valve seat to prevent hydrogen from entering the inlet, and an open position at which the flow of hydrogen is allowed to flow between the inlet and the outlet, the inlet valve arrangement comprising a valve portion and an axially extending head portion having an upper end arranged at the valve portion, and a lower end facing away from the valve portion, wherein the valve portion comprises a surface arranged in abutment with the valve seat when the inlet valve arrangement assumes the closed position, wherein the inlet valve arrangement comprises an axially extending flow guiding portion forming part of the head portion, wherein the flow of hydrogen is configured to flow along the flow guiding portion between the inlet and the outlet, the axially extending flow guiding portion comprising an envelope surface facing a smooth inner surface of the nozzle cap, wherein the smooth inner surface extends from the valve seat to the lower portion of the nozzle cap, the envelope surface comprising a valve protrusion protruding radially towards the smooth inner surface of the nozzle cap, wherein the smooth inner surface of the nozzle cap comprises a nozzle protrusion protruding radially towards the envelope surface of the flow guiding portion, the nozzle protrusion being arranged axially between the valve protrusion and the at least one outlet of the nozzle cap, wherein the valve protrusion and the nozzle protrusion at least partly overlap in a radial direction.

2 . The fuel injection arrangement according to claim 1 , wherein the valve protrusion extends circumferentially around the envelope surface.

3 . The fuel injection arrangement according to claim 1 , wherein the nozzle protrusion extends in a circumferential direction between a first and a second circumferential end portion of the at least one outlet.

4 . The fuel injection arrangement according to claim 1 , wherein the valve protrusion and the nozzle protrusion are arranged at an axial distance from each other when the inlet valve arrangement assumes the open position.

5 . The fuel injection arrangement according to claim 1 , wherein the valve protrusion is arranged at an axial distance from the inlet of the nozzle cap when the inlet valve arrangement assumes the closed position.

6 . The fuel injection arrangement according to claim 1 , wherein the valve portion and the head portion are integrally formed with each other.

7 . The fuel injection arrangement according to claim 1 , wherein the axially extending flow guiding portion forms part of the head portion.

8 . The fuel injection arrangement according to claim 1 , wherein the head portion comprises a taper shaped surface between the valve protrusion and the lower end.

9 . The fuel injection arrangement according to claim 8 , wherein a diameter of the head portion increases along the taper shaped surface in a direction from the valve protrusion to the lower end.

10 . The fuel injection arrangement according to claim 8 , wherein a diameter of the head portion decreases along the taper shaped surface in a direction from the valve protrusion to the lower end.

11 . The fuel injection arrangement according to claim 1 , wherein the at least one outlet comprises two outlet portions.

12 . The fuel injection arrangement according to claim 11 , wherein the nozzle cap comprises a pair of bulge portions at the lower portion of the nozzle cap, each of the bulge portions protrudes radially towards an axially extending geometric centre axis of the fuel injection arrangement to form the two outlet portions.

13 . The fuel injection arrangement according to claim 12 , wherein a portion of the valve arrangement is arranged in close proximity with the pair of bulge portions when the valve arrangement assumes the open position.

14 . The fuel injection arrangement according to claim 12 , wherein each of the bulge portions extends axially from the lower portion of the nozzle cap and in a direction towards the inlet.

15 . A hydrogen internal combustion engine comprising a fuel injection arrangement according to claim 1 .

16 . A vehicle comprising a fuel injection arrangement according to claim 1 .

Assignees

• Volvo Truck Corp

Inventors

• Eismark Jan
• Ehleskog Rickard
• Hindi Gustavo
• Simonsson Tommy

Classifications

• F16K1/54

  Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve · CPC title

• F02M21/0206 Primary

  Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide · CPC title

• Y02T10/30

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

• F02M61/06

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

• F02M61/08

  the valves opening in direction of fuel flow {(F02M61/047 takes precedence)} · CPC title