Spark ignited engine with a pre-chamber, a prechamber and an adapter insert for the engine
US-11840954-B2 · Dec 12, 2023 · US
Engine
US11976585B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11976585-B2 |
| Application number | US-202217989043-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 17, 2022 |
| Priority date | Dec 6, 2021 |
| Publication date | May 7, 2024 |
| Grant date | May 7, 2024 |
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- Title
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Abstract
Official abstract text for this publication.
To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chamber. The specific ratio obtained by dividing a bore/stroke ratio of a cylinder by the volume of the sub-chamber is greater than or equal to 6.6 cm −3 and less than or equal to 57.6 cm −3 .
First claim
Opening claim text (preview).
The invention claimed is: 1. An engine comprising: a cylinder block in which a cylinder is formed; a cylinder head assembled onto the cylinder block to cover a top of the cylinder; a piston provided so as to reciprocate inside the cylinder, the piston defining a combustion chamber together with the cylinder block and the cylinder head; and a spark plug that performs ignition in the combustion chamber, wherein the combustion chamber includes a sub-chamber that houses an electrode of the spark plug, and a main chamber separated from the sub-chamber by a partition wall having a through-hole, the main chamber having a volume larger than a volume of the sub-chamber, and wherein a specific ratio obtained by dividing a bore/stroke ratio of the cylinder by the volume of the sub-chamber is greater than or equal to 6.6 cm −3 and less than or equal to 57.6 cm −3 . 2. The engine according to claim 1 , wherein the bore/stroke ratio is set to greater than or equal to 1 and less than or equal to 1.5. 3. The engine according to claim 1 , wherein a compression ratio of the engine is greater than or equal to 14 and less than or equal to 25. 4. The engine according to claim 1 , further comprising: an injector that injects fuel into the main chamber, wherein an air-fuel mixture in the sub-chamber is generated by causing the fuel injected by the injector to flow into the sub-chamber through the through-hole. 5. The engine according to claim 1 , wherein the specific ratio is greater than or equal to 8.5 cm −3 and less than or equal to 23.4 cm −3 . 6. The engine according to claim 5 , wherein a compression ratio of the engine is greater than or equal to 14 and less than or equal to 25. 7. The engine according to claim 5 , further comprising: an injector that injects fuel into the main chamber, wherein an air-fuel mixture in the sub-chamber is generated by causing the fuel injected by the injector to flow into the sub-chamber through the through-hole. 8. The engine according to claim 5 , wherein the bore/stroke ratio is set to greater than or equal to 1 and less than or equal to 1.5. 9. The engine according to claim 8 , wherein a compression ratio of the engine is greater than or equal to 14 and less than or equal to 25. 10. The engine according to claim 8 , further comprising: an injector that injects fuel into the main chamber, wherein an air-fuel mixture in the sub-chamber is generated by causing the fuel injected by the injector to flow into the sub-chamber through the through-hole. 11. The engine according to claim 9 , further comprising: an injector that injects fuel into the main chamber, wherein an air-fuel mixture in the sub-chamber is generated by causing the fuel injected by the injector to flow into the sub-chamber through the through-hole. 12. The engine according to claim 11 , wherein the injector injects liquid fuel. 13. The engine according to claim 12 , wherein the through-hole is one of four to six through-holes that are formed in the partition wall so as to be arranged at intervals in a circumferential direction around the electrode of the spark plug.
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- What does patent US11976585B2 cover?
- To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chambe…
- Who is the assignee on this patent?
- Mazda Motor
- What technology area does this patent fall under?
- Primary CPC classification F02B19/12. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 07 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).