System and method for variable actuation of a valve of an internalcombustion engine, with an electrically operated control valve having an improved control
US-10151221-B2 · Dec 11, 2018 · US
the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve · 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 | F01L9/14 |
| Official title | the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve |
| Display label | the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve |
| Total patents | 135 |
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 | 14 |
| 2016 | 21 |
| 2017 | 19 |
| 2018 | 13 |
| 2019 | 16 |
| 2020 | 19 |
| 2021 | 14 |
| 2022 | 12 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Damper for a high pressure chamber of a variable valve train module
US-2018347413-A1 · Dec 6, 2018 · US
Piston hydraulique a valve porte-joint de refroidissement et de lubrification
US-2018347417-A1 · Dec 6, 2018 · US
Hydraulic valve drive of an internal combustion engine
US-2018230868-A1 · Aug 16, 2018 · US
Internal-combustion engine with an electronically controlled hydraulic system for variable actuation of the intake valves, provided with a device for refilling the system with fluid
US-9970336-B2 · May 15, 2018 · US
Actuator for an electrohydraulic gas-exchange valve train of a combustion engine
US-9920664-B2 · Mar 20, 2018 · US
System and method of adjusting actuation timing of valves in a piston engine
US-2017335727-A1 · Nov 23, 2017 · US
Valve opening and closing apparatus
US-9822675-B2 · Nov 21, 2017 · US
Managing shift energy in a transmission of a vehicle
US-9777651-B2 · Oct 3, 2017 · US
A method of controlling an operation of an inlet valve system and an inlet valve control system
US-2017268434-A1 · Sep 21, 2017 · US
Hydraulic valve for a cam phaser
US-2017260883-A1 · Sep 14, 2017 · US
Applied-ignition internal combustion engine with variable valve drive
US-9752470-B2 · Sep 5, 2017 · US
Piston assembly retainer with integrated spring seat
US-9745874-B2 · Aug 29, 2017 · US
Variable tensioner for cam drive
US-9739348-B2 · Aug 22, 2017 · US
System for variable actuation of a valve of an internal-combustion engine
US-2017183991-A1 · Jun 29, 2017 · US
System and method for variable actuation of a valve of an internalcombustion engine, with an electrically operated control valve having an improved control
US-2017175592-A1 · Jun 22, 2017 · US
Crankshaft driven valve actuation using a connecting rod
US-2017159514-A1 · Jun 8, 2017 · US
Variable valve timing mechanism
US-2017122148-A1 · May 4, 2017 · US
Variable tensioner for cam drive
US-2017114872-A1 · Apr 27, 2017 · US
Piston assembly retainer with integrated spring seat
US-2017114679-A1 · Apr 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01L9/14?
- CPC F01L9/14 is the Cooperative Patent Classification code for “the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve.”
- How many patents are filed under CPC F01L9/14 (the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve)?
- Our database includes 135 publications tagged with this CPC code.
- Is patent activity under CPC F01L9/14 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).