Ammonia-rich combustion coupled dual-mode prechamber ammonia-fueled engine control system
US-12480453-B2 · Nov 25, 2025 · US
controlling, e.g. varying fuel-air ratio, quantity of charge
controlling, e.g. varying fuel-air ratio, quantity of charge · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F02B19/1052 |
| Official title | {controlling, e.g. varying fuel-air ratio, quantity of charge} |
| Display label | controlling, e.g. varying fuel-air ratio, quantity of charge |
| Total patents | 29 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ammonia-rich combustion coupled dual-mode prechamber ammonia-fueled engine control system
US-2025146449-A1 · May 8, 2025 · US
Internal combustion engine and a method for operating an internal combustion engine
US-12241401-B2 · Mar 4, 2025 · US
Internal combustion engine
US-12025067-B2 · Jul 2, 2024 · US
Ammonia-hydrogen blended fuel control system based on reactivity regulation
US-11885259-B1 · Jan 30, 2024 · US
Ammonia-hydrogen blended fuel control system based on reactivity regulation
US-2024018897-A1 · Jan 18, 2024 · US
Internal combustion engine
US-2024018916-A1 · Jan 18, 2024 · US
Internal combustion engine and a method for operating an internal combustion engine
US-2023167762-A1 · Jun 1, 2023 · US
Systems and methods for adjustable pre-chamber
US-11378002-B1 · Jul 5, 2022 · US
Systems and methods for adjusting fueling in a cylinder with a pre-chamber
US-11306674-B2 · Apr 19, 2022 · US
Systems and methods for adjustable pre-chamber
US-11293337-B1 · Apr 5, 2022 · US
Systems and methods for exhaust gas recirculation with a prechamber
US-11230963-B2 · Jan 25, 2022 · US
Systems and methods for exhaust gas recirculation with a prechamber
US-2021310402-A1 · Oct 7, 2021 · US
Systems and methods for fouling reduction in a pre-chamber
US-11118497-B2 · Sep 14, 2021 · US
Systems and methods for fouling reduction in a pre-chamber
US-2021246823-A1 · Aug 12, 2021 · US
Systems and methods for exhaust gas recirculation with a pre-chamber
US-11066978-B1 · Jul 20, 2021 · US
Systems and methods for adjusting fueling in a cylinder with a pre-chamber
US-2021207551-A1 · Jul 8, 2021 · US
Systems and methods for adjusting fueling in a cylinder with a pre-chamber
US-10989129-B1 · Apr 27, 2021 · US
Method for regulating an internal combustion engine
US-10837351-B2 · Nov 17, 2020 · US
Internal combustion engine with gas feeding system
US-10619556-B2 · Apr 14, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B19/1052?
- CPC F02B19/1052 is the Cooperative Patent Classification code for “controlling, e.g. varying fuel-air ratio, quantity of charge.”
- How many patents are filed under CPC F02B19/1052 (controlling, e.g. varying fuel-air ratio, quantity of charge)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC F02B19/1052 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).