Multi-port exhaust valve
US-12553402-B2 · Feb 17, 2026 · US
Variable control of exhaust valves only
Variable control of exhaust valves only · 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 | F02D13/0284 |
| Official title | {Variable control of exhaust valves only} |
| Display label | Variable control of exhaust valves only |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 2 |
| 2023 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust valve controller for two-stroke engines
US-2025052206-A1 · Feb 13, 2025 · US
Multi-port exhaust valve
US-2023359403-A1 · Nov 9, 2023 · US
Multi-port exhaust valve for two-stroke engines
US-11761358-B2 · Sep 19, 2023 · US
Multi-port exhaust valve for two-stroke engines
US-2023258110-A1 · Aug 17, 2023 · US
Marine engine
US-11131254-B2 · Sep 28, 2021 · US
Marine engine
US-11105281-B2 · Aug 31, 2021 · US
Marine engine
US-2020408160-A1 · Dec 31, 2020 · US
Marine engine
US-2020300183-A1 · Sep 24, 2020 · US
Engine braking an opposed piston that includes a mechanically driven supercharger
US-10605158-B2 · Mar 31, 2020 · US
Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same
US-10371021-B2 · Aug 6, 2019 · US
Control of airflow in a uniflow-scavenged, two-stroke cycle, opposed-piston engine during transient operation
US-2019120164-A1 · Apr 25, 2019 · US
System and method for engine braking
US-2019085758-A1 · Mar 21, 2019 · US
Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same
US-2019003350-A1 · Jan 3, 2019 · US
Control of airflow in a uniflow-scavenged, two-stroke cycle, opposed-piston engine during transient operation
US-10161345-B2 · Dec 25, 2018 · US
Exhaust valve assembly for a two-stroke internal combustion engine and method for cleaning same
US-10113452-B2 · Oct 30, 2018 · US
Engine system for reducing gaseous fuel slip
US-9714624-B2 · Jul 25, 2017 · US
Control of airflow in a uniflow-scavanged, two-stroke cycle, opposed-piston engine during transient operation
US-2017204801-A1 · Jul 20, 2017 · US
Engine having active exhaust valve position control system and method
US-9506407-B2 · Nov 29, 2016 · US
Engine system for reducing gaseous fuel slip
US-2016290243-A1 · Oct 6, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D13/0284?
- CPC F02D13/0284 is the Cooperative Patent Classification code for “Variable control of exhaust valves only.”
- How many patents are filed under CPC F02D13/0284 (Variable control of exhaust valves only)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC F02D13/0284 growing?
- Publication counts under this code: 3 in 2023 vs 1 in 2025 (latest complete years).