Engine system

Patent metadata

Field	Value
Publication number	US-11629671-B2
Application number	US-202217573113-A
Country	US
Kind code	B2
Filing date	Jan 11, 2022
Priority date	Feb 4, 2021
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

An engine system includes a combustion chamber and an air supplier. The combustion chamber is formed in a cylinder. The air supplier is configured to supply air to a circumferential area of the combustion chamber. The circumferential area is near an inner circumferential surface of the cylinder. The air supplier is configured to supply air to the circumferential area before ignition to gather a rich air-fuel mixture that is present in the combustion chamber to a central area of the combustion chamber such that a stratified body consisting of a layer of the air-fuel mixture in the central area and a layer of the air in the circumferential area is formed.

First claim

The invention claimed is:

1. An engine system comprising:
a combustion chamber formed in a cylinder; and
an air supplier configured to supply air to a circumferential area of the combustion chamber, the circumferential area being near an inner circumferential surface of the cylinder,
wherein the air supplier is configured to supply air to the circumferential area before ignition to gather a rich air-fuel mixture that is present in the combustion chamber to a central area of the combustion chamber such that a stratified body comprising a layer of the air-fuel mixture in the central area and a layer of the air in the circumferential area is formed, and
wherein a gap is provided between a cylinder block and a cylinder head, the cylinder head being disposed on the cylinder block and covering the cylinder.

2. The engine system according to claim 1 ,
wherein the gap is continuous with the combustion chamber.

3. The engine system according to claim 1 , wherein the cylinder block comprises the cylinder.

4. The engine system according to claim 1 , wherein the air supplier communicates with the gap and is configured to supply the air to the circumferential area through the gap.

5. The engine system according to claim 1 , wherein the gap is a flat annular space surrounding the combustion chamber.

6. The engine system according to claim 1 , wherein the air supplier supplies the air into the combustion chamber through the gap in a direction from the cylinder head toward the cylinder block.

7. The engine system according to claim 1 , wherein the air is redirected at the gap before being supplied to the combustion chamber.

8. An engine system comprising:
a combustion chamber formed in a cylinder; and
an air supplier configured to supply air to a circumferential area of the combustion chamber, the circumferential area being near an inner circumferential surface of the cylinder,
wherein the air supplier is configured to supply air to the circumferential area before ignition to gather a rich air-fuel mixture that is present in the combustion chamber to a central area of the combustion chamber such that a stratified body comprising a layer of the air-fuel mixture in the central area and a layer of the air in the circumferential area is formed,
wherein a gap is provided between a cylinder block and a cylinder head, the cylinder block comprising the cylinder, the cylinder head being disposed on the cylinder block and covering the cylinder, and
wherein the air supplier communicates with the gap and is configured to supply the air to the circumferential area through the gap.

9. The engine system according to claim 8 , wherein the gap is continuous with the combustion chamber.

10. The engine system according to claim 8 , wherein the gap is a flat annular space surrounding the combustion chamber and is continuous with the combustion chamber.

11. The engine system according to claim 8 , wherein the gap is a flat annular space surrounding the combustion chamber.

12. The engine system according to claim 8 , wherein the air supplier supplies the air into the combustion chamber through the gap in a direction from the cylinder head toward the cylinder block.

13. An engine system comprising:
a combustion chamber formed in the cylinder;
a cylinder head disposed on a cylinder block;
an air supplier configured to supply air to a circumferential area of the combustion chamber,
wherein the air supplier communicates with a gap and is configured to supply air through the gap to the circumferential area before ignition to gather a rich air-fuel mixture that is present in the combustion chamber to a central area of the combustion chamber such that a stratified body comprising a layer of the air-fuel mixture in the central area and a layer of the air in the circumferential area is formed, and
wherein the cylinder block comprises the cylinder.

14. The engine system according to claim 13 , wherein the gap is provided between the cylinder block and the cylinder head.

15. The engine system according to claim 13 , wherein the gap is provided between the cylinder block and the cylinder head and is continuous with the combustion chamber.

16. The engine system according to claim 13 ,
wherein the circumferential area is near an inner circumferential surface of the cylinder, and
wherein the gap is provided between the cylinder block and the cylinder head.

17. The engine system according to claim 13 ,
wherein the air supplier supplies air through the gap to the circumferential area of the combustion chamber, the gap being provided between the cylinder block and the cylinder head.

18. The engine system according to claim 13 , wherein the cylinder head is disposed on the cylinder to cover the cylinder and is coupled to the cylinder block.

19. The engine system according to claim 13 , the gap being provided between the cylinder block and the cylinder head,
wherein the air supplier supplies the air into the combustion chamber through the gap in a direction from the cylinder head toward the cylinder block.

20. The engine system according to claim 13 , wherein the air is redirected at the gap before being supplied to the combustion chamber, the gap being provided between the cylinder block and the cylinder head.

Assignees

• Subaru Corp

Inventors

• Toma Kouhei
• Tsuda Takeshi
• Adachi Ryo

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B23/00 Primary

  Other engines characterised by special shape or construction of combustion chambers to improve operation (engines with incandescent chambers F02B9/08) · CPC title

• F02M23/003

  Particular shape of air intake · CPC title

• F02M2023/008

  by injecting compressed air directly into the combustion chamber · CPC title

• F02B17/00 Primary

  Engines characterised by means for effecting stratification of charge in cylinders · CPC title