Variable valve device
US-12584426-B2 · Mar 24, 2026 · US
Methods of operation thereof; Control of valve actuation, e.g. duration or lift
Methods of operation thereof; Control of valve actuation, e.g. duration or lift · 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 | F01L9/40 |
| Official title | Methods of operation thereof; Control of valve actuation, e.g. duration or lift |
| Display label | Methods of operation thereof; Control of valve actuation, e.g. duration or lift |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 2 |
| 2019 | 1 |
| 2021 | 5 |
| 2022 | 13 |
| 2023 | 8 |
| 2024 | 5 |
| 2025 | 10 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Shutdown control of internal combustion engine comprising lost motion component
US-12460594-B2 · Nov 4, 2025 · US
Valve opening-closing timing control device
US-2025297560-A1 · Sep 25, 2025 · US
Valve opening and closing timing control device
US-12385421-B2 · Aug 12, 2025 · US
Variable valve device
US-12297756-B2 · May 13, 2025 · US
Anti-clatter engine brake and engine having same
US-12276215-B1 · Apr 15, 2025 · US
Variable valve device
US-2025109700-A1 · Apr 3, 2025 · US
Variable valve device
US-2025109699-A1 · Apr 3, 2025 · US
System facilitating cylinder deactivation and 1.5-stroke engine braking operation in an internal combustion engine
US-12264605-B2 · Apr 1, 2025 · US
Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other
US-12247502-B2 · Mar 11, 2025 · US
Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other
US-2025020072-A1 · Jan 16, 2025 · US
Active method for cold start emissions reduction
US-12123369-B2 · Oct 22, 2024 · US
Valve opening and closing timing control device
US-2024295181-A1 · Sep 5, 2024 · US
Active method for cold start emissions reduction
US-2024263597-A1 · Aug 8, 2024 · US
System facilitating cylinder deactivation and 1.5-stroke engine braking operation in an internal combustion engine
US-2024183291-A1 · Jun 6, 2024 · US
Shutdown control of internal combustion engine comprising lost motion component
US-2024175403-A1 · May 30, 2024 · US
Electrically-actuated camshaft phaser with backlash reduction
US-11852053-B2 · Dec 26, 2023 · US
Engine valve actuation
US-11788442-B2 · Oct 17, 2023 · US
Camless engine
US-11725548-B2 · Aug 15, 2023 · US
Internal combustion engine with fast combustion and method of control of such an engine
US-11692465-B2 · Jul 4, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01L9/40?
- CPC F01L9/40 is the Cooperative Patent Classification code for “Methods of operation thereof; Control of valve actuation, e.g. duration or lift.”
- How many patents are filed under CPC F01L9/40 (Methods of operation thereof; Control of valve actuation, e.g. duration or lift)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC F01L9/40 growing?
- Publication counts under this code: 5 in 2024 vs 10 in 2025 (latest complete years).