Method for operating an arrangement for using waste heat
US-2017335783-A1 · Nov 23, 2017 · US
Leakage detection
Leakage detection · 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 | F02D2041/225 |
| Official title | {Leakage detection} |
| Display label | Leakage detection |
| Total patents | 342 |
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 | 25 |
| 2016 | 30 |
| 2017 | 37 |
| 2018 | 34 |
| 2019 | 45 |
| 2020 | 32 |
| 2021 | 39 |
| 2022 | 44 |
| 2023 | 21 |
| 2024 | 14 |
| 2025 | 12 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for opportunistic vehicle evaporative emissions test diagnostic
US-2017292475-A1 · Oct 12, 2017 · US
Method of operating an internal combustion engine
US-9765725-B2 · Sep 19, 2017 · US
Vehicle control apparatus and vehicle control method
US-9745902-B2 · Aug 29, 2017 · US
Method and device for diagnosing leak of fuel system in vehicle
US-2017058809-A1 · Mar 2, 2017 · US
Method and system for diagnosing a purge ejector
US-9528473-B2 · Dec 27, 2016 · US
Natural gas leak detection through pressure loss in pneumatic starter and prelube
US-2016369711-A1 · Dec 22, 2016 · US
Method and device for functional control of a high pressure fuel pump
US-9518527-B2 · Dec 13, 2016 · US
Methods and systems for common rail fuel system maintenance health diagnostic
US-9512799-B2 · Dec 6, 2016 · US
Methods for detecting high pressure pump bore wear
US-9506417-B2 · Nov 29, 2016 · US
Method and system for diagnosing a purge ejector
US-2016341155-A1 · Nov 24, 2016 · US
Method for detecting fuel system degradation
US-2016341141-A1 · Nov 24, 2016 · US
Method for detecting leaks in an intake manifold
US-2016332620-A1 · Nov 17, 2016 · US
Method and system for diagnosing common rail diesel engine
US-9476378-B2 · Oct 25, 2016 · US
System and method for controlling canister purging
US-2016305352-A1 · Oct 20, 2016 · US
System and method for estimating high-pressure fuel leakage in a common rail fuel system
US-9470167-B2 · Oct 18, 2016 · US
Apparatus for controlling the fuel supply of an internal combustion engine
US-2016290249-A1 · Oct 6, 2016 · US
Liquefied petroleum gas tank leak detection systems and methods
US-9454856-B2 · Sep 27, 2016 · US
Gaseous fuel supply device
US-2016273472-A1 · Sep 22, 2016 · US
Tank leakage diagnosis having a fuel tank as a pressure store
US-2016266003-A1 · Sep 15, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D2041/225?
- CPC F02D2041/225 is the Cooperative Patent Classification code for “Leakage detection.”
- How many patents are filed under CPC F02D2041/225 (Leakage detection)?
- Our database includes 342 publications tagged with this CPC code.
- Is patent activity under CPC F02D2041/225 growing?
- Publication counts under this code: 14 in 2024 vs 12 in 2025 (latest complete years).