Stratified nitrogen enriched air (nea) strategies and methods to reduce nox emissions from engines
US-2025243799-A1 · Jul 31, 2025 · US
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Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines · 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 | F02B47/00 |
| Official title | Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines |
| Display label | Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Lubricant Compositions Containing Magnesium Detergent For Reduced Pre-ignition In Hydrogen Fueled Engines
US-2025197761-A1 · Jun 19, 2025 · US
Lubricant Compositions For Reduced Pre-ignition In Hydrogen Fueled Engines
US-2025197762-A1 · Jun 19, 2025 · US
Spark-ignition internal combustion engine having urea introduction device and method for operating an internal combustion engine of this type
US-11111884-B2 · Sep 7, 2021 · US
Spark-Ignition Internal Combustion Engine Having Urea Introduction Device and Method for Operating an Internal Combustion Engine of This Type
US-2020362798-A1 · Nov 19, 2020 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2020300186-A1 · Sep 24, 2020 · US
System for storing an auxiliary liquid and supplying same to an internal combustion engine
US-10767598-B2 · Sep 8, 2020 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-10711712-B2 · Jul 14, 2020 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2019309697-A1 · Oct 10, 2019 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-10344689-B2 · Jul 9, 2019 · US
System for storing an auxiliary liquid and supplying same to an internal combustion engine
US-2019107080-A1 · Apr 11, 2019 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2019048811-A1 · Feb 14, 2019 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-10138826-B2 · Nov 27, 2018 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2018016998-A1 · Jan 18, 2018 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-9810166-B2 · Nov 7, 2017 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2017191431-A1 · Jul 6, 2017 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-9695784-B2 · Jul 4, 2017 · US
Method and system for prioritizing vehicle vacuum
US-9488168-B2 · Nov 8, 2016 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-2016138529-A1 · May 19, 2016 · US
Fuel management system for variable ethanol octane enhancement of gasoline engines
US-9255519-B2 · Feb 9, 2016 · US