Cylinder head

Patent metadata

Field	Value
Publication number	US-12416274-B2
Application number	US-202418795363-A
Country	US
Kind code	B2
Filing date	Aug 6, 2024
Priority date	Aug 21, 2023
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

The present disclosure relates to a cylinder head configured to mount to a combustion cylinder of an internal combustion engine, ICE, the cylinder head including a cylinder head surface configured to face an internal combustion chamber of the combustion cylinder, a cavity including an inner cavity surface and a cavity side wall, the cavity extending from the cylinder head surface, along the cavity side wall, to the inner cavity surface in a direction away from the cylinder head surface, and an opening arranged in the inner cavity surface, the opening being configured to be provided with a fuel injector for feeding gaseous fuel into the combustion chamber, wherein the cavity side wall includes a surface discontinuity portion, the surface discontinuity portion being arranged at a distance from the inner cavity surface.

First claim

What is claimed is:

1. A cylinder head configured to mount to a combustion cylinder of an internal combustion engine the cylinder head comprising:
a cylinder head surface configured to face an internal combustion chamber of the combustion cylinder,
a cavity comprising an inner cavity surface and a cavity side wall, the cavity extending from the cylinder head surface, along the cavity side wall, to the inner cavity surface in a direction away from the cylinder head surface, and
an opening arranged in the inner cavity surface, the opening being configured to be provided with a fuel injector for feeding gaseous fuel into the combustion chamber, wherein the cavity side wall comprises a surface discontinuity portion, the surface discontinuity portion being arranged at a distance from the inner cavity surface, wherein the surface discontinuity portion comprises at least one recess arranged in the cavity side wall, wherein the at least one recess comprises a plurality of recesses.

2. The cylinder head of claim 1 , wherein an envelope surface of the cavity side wall extends 360 degrees in a circumferential direction.

3. The cylinder head of claim 1 , wherein the surface discontinuity portion is integrated with the cavity side wall.

4. The cylinder head of claim 1 , wherein the surface discontinuing portion comprises a protrusion.

5. The cylinder head of claim 4 , wherein the protrusion is arranged at an interface between the cylinder head surface and the inner cavity surface, the protrusion extending towards a center portion of the cavity.

6. The cylinder head of claim 4 , wherein the protrusion extends in 360 degrees at the cavity side wall.

7. The cylinder head of claim 4 , wherein the protrusion is flush with the cylinder head surface.

8. The cylinder head of claim 4 , wherein the protrusion is arranged at a non-zero distance from the cylinder head surface.

9. The cylinder head of claim 1 , wherein the recesses of the plurality of recesses are evenly distributed in the circumferential direction of the cavity side wall.

10. The cylinder head of claim 1 , wherein the recess extends from the cylinder head surface in a direction towards the inner cavity surface.

11. An internal combustion engine comprising a combustion cylinder housing a reciprocating piston, a cylinder head according to claim 1 , the cylinder head being mounted to the combustion cylinder, and a fuel injector arranged at inner cavity surface of the cavity.

12. The internal combustion engine of claim 11 , wherein the internal combustion engine is a hydrogen internal combustion engine.

13. A vehicle, comprising an internal combustion engine according to claim 11 .

Assignees

• Volvo Truck Corp

Inventors

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

Classifications

• F02M21/0275

  for in-cylinder direct injection, e.g. injector combined with spark plug · CPC title

• F02D19/0644

  the gaseous fuel being hydrogen, ammonia or carbon monoxide · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title

• F02M21/0281

  Adapters, sockets or the like to mount injection valves onto engines; Fuel guiding passages between injectors and the air intake system or the combustion chamber · CPC title

• F02M21/0206

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