Exhaust gas purification apparatus for internal combustion engine
US-9528412-B2 · Dec 27, 2016 · US
Mechanical Engineering
Mechanical Engineering · 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 | F02D41/025 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 470 |
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 | 44 |
| 2016 | 39 |
| 2017 | 45 |
| 2018 | 45 |
| 2019 | 75 |
| 2020 | 63 |
| 2021 | 50 |
| 2022 | 41 |
| 2023 | 34 |
| 2024 | 23 |
| 2025 | 9 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Techniques for raising exhaust temperatures
US-9523319-B2 · Dec 20, 2016 · US
Method for operating an internal combustion engine, and internal combustion engine
US-9518486-B2 · Dec 13, 2016 · US
Exhaust purification apparatus for internal combustion engine
US-9512796-B2 · Dec 6, 2016 · US
Control system of internal combustion engine
US-2016341088-A1 · Nov 24, 2016 · US
Method of controlling operation of an engine having both an exhaust fluid recirculation apparatus and an exhaust fluid treatment apparatus
US-9488089-B2 · Nov 8, 2016 · US
Internal combustion engine
US-2016319750-A1 · Nov 3, 2016 · US
Exhaust injection control method for exhaust gas post-treatment device
US-2016319756-A1 · Nov 3, 2016 · US
Diesel engine with reduced particulate material accumulation and related method
US-9458753-B2 · Oct 4, 2016 · US
Internal combustion engine equipped with an aftertreatment device
US-2016252028-A1 · Sep 1, 2016 · US
Internal combustion engine and control method for same
US-9422848-B2 · Aug 23, 2016 · US
Method and system for pre-ignition control
US-9404407-B2 · Aug 2, 2016 · US
Method of operating an internal combustion engine
US-2016177859-A1 · Jun 23, 2016 · US
Method of operating an exhaust gas treatment system to prevent quenching during regeneration
US-9371763-B2 · Jun 21, 2016 · US
Method for monitoring an oxidation catalysis device
US-2016169076-A1 · Jun 16, 2016 · US
Catalyst Protection Against Hydrocarbon Exposure
US-2016084135-A1 · Mar 24, 2016 · US
Vehicle exhaust particulate filter regeneration
US-2015377160-A1 · Dec 31, 2015 · US
Exhaust purification apparatus for internal combustion engine
US-2015369153-A1 · Dec 24, 2015 · US
Method and system for secondary air injection coordination with exhaust back pressure valve
US-2015369101-A1 · Dec 24, 2015 · US
Closed loop NOX reference management for DPF regeneration based on engine out particulate matter variation controller
US-9206756-B2 · Dec 8, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D41/025?
- CPC F02D41/025 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F02D41/025 (Mechanical Engineering)?
- Our database includes 470 publications tagged with this CPC code.
- Is patent activity under CPC F02D41/025 growing?
- Publication counts under this code: 23 in 2024 vs 9 in 2025 (latest complete years).