Systems and methods for providing compression release with continuous variable valve lift
US-11473459-B2 · Oct 18, 2022 · US
in which the action of a cam is being transmitted to a valve by a liquid column
in which the action of a cam is being transmitted to a valve by a liquid column · 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 | F01L9/11 |
| Official title | in which the action of a cam is being transmitted to a valve by a liquid column |
| Display label | in which the action of a cam is being transmitted to a valve by a liquid column |
| Total patents | 45 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 8 |
| 2018 | 4 |
| 2019 | 8 |
| 2020 | 7 |
| 2021 | 4 |
| 2022 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and system for a continuously variable valve lift system
US-11326482-B2 · May 10, 2022 · US
Systems and methods for providing compression release with continuous variable valve lift
US-2022010702-A1 · Jan 13, 2022 · US
Hydraulics unit for an internal combustion engine with hydraulically variable gas exchange valve gear
US-11187117-B2 · Nov 30, 2021 · US
Hydraulics unit for an internal combustion engine with hydraulically variable gas exchange valve gear
US-2021293162-A1 · Sep 23, 2021 · US
Valve train for the variable actuation of an inlet valve and an outlet valve, and internal combustion engine having a valve train of this type
US-10961878-B2 · Mar 30, 2021 · US
Apparatus and method for a hydraulic valvetrain system
US-10961877-B2 · Mar 30, 2021 · US
Valve drive for an internal combustion engine
US-10711663-B2 · Jul 14, 2020 · US
Regenerative valve hydraulic actuator
US-10704431-B2 · Jul 7, 2020 · US
Oil control valve
US-2020182105-A1 · Jun 11, 2020 · US
Method and system for a continuously variable valve lift system
US-2020149437-A1 · May 14, 2020 · US
Hydraulic early engine exhaust valve opening system
US-10641140-B2 · May 5, 2020 · US
Two-piece block for variable valve train system
US-10641137-B2 · May 5, 2020 · US
Apparatus and method for a hydraulic valvetrain system
US-2020003087-A1 · Jan 2, 2020 · US
System for variable actuation of a valve of an internal-combustion engine
US-10487704-B2 · Nov 26, 2019 · US
Valve drive for an internal combustion engine
US-2019353062-A1 · Nov 21, 2019 · US
System and method of adjusting actuation timing of valves in a piston engine
US-10329969-B2 · Jun 25, 2019 · US
Multi-piece valve train block with integrated camshaft support
US-10301978-B2 · May 28, 2019 · US
Valve train for the variable actuation of an inlet valve and an outlet valve,and internal combustion engine having a valve train of this type
US-2019120093-A1 · Apr 25, 2019 · US
Two-piece block for variable valve train system
US-2019107012-A1 · Apr 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01L9/11?
- CPC F01L9/11 is the Cooperative Patent Classification code for “in which the action of a cam is being transmitted to a valve by a liquid column.”
- How many patents are filed under CPC F01L9/11 (in which the action of a cam is being transmitted to a valve by a liquid column)?
- Our database includes 45 publications tagged with this CPC code.
- Is patent activity under CPC F01L9/11 growing?
- Publication counts under this code: 4 in 2021 vs 3 in 2022 (latest complete years).