Multi-level firing engine control
US-2018320614-A1 · Nov 8, 2018 · US
Variable control of the intake valves only
Variable control of the intake valves only · 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 | F02D13/0223 |
| Official title | {Variable control of the intake valves only} |
| Display label | Variable control of the intake valves only |
| Total patents | 184 |
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 | 8 |
| 2016 | 20 |
| 2017 | 16 |
| 2018 | 20 |
| 2019 | 17 |
| 2020 | 35 |
| 2021 | 23 |
| 2022 | 20 |
| 2023 | 10 |
| 2024 | 8 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Control device for internal combustion engine
US-10119517-B2 · Nov 6, 2018 · US
Control device for internal combustion engine
US-2018291826-A1 · Oct 11, 2018 · US
Method for retracting a partially extended sliding camshaft actuator pin
US-2018283227-A1 · Oct 4, 2018 · US
Multi-level skip fire
US-10072592-B2 · Sep 11, 2018 · US
Methods of knock control
US-2018252171-A1 · Sep 6, 2018 · US
Method for compensating valve drift in an internal combustion engine
US-2018195452-A1 · Jul 12, 2018 · US
Cooperative cam phaser and air throttle control
US-2018195441-A1 · Jul 12, 2018 · US
Noise/vibration reduction control
US-2018163650-A1 · Jun 14, 2018 · US
Method and apparatus for diagnosing engine system
US-2018163658-A1 · Jun 14, 2018 · US
Cylinder de-activation control method and cylinder de-activation system
US-2018149100-A1 · May 31, 2018 · US
Cooperative cam phaser and air throttle control
US-9926856-B2 · Mar 27, 2018 · US
System and method for engine combustion
US-9915221-B2 · Mar 13, 2018 · US
Method and system for engine auto-ignition detection and mitigation
US-9915240-B2 · Mar 13, 2018 · US
Direct injection engine
US-2018038306-A1 · Feb 8, 2018 · US
Control method and system for stability of intermediate phase continuously variable valve timing system
US-2018016951-A1 · Jan 18, 2018 · US
Method and system for engine auto-ignition detection and mitigation
US-2017328334-A1 · Nov 16, 2017 · US
Internal combustion engine
US-9790881-B2 · Oct 17, 2017 · US
Hybrid vehicle, controller for hybrid vehicle, and control method for hybrid vehicle with a change of the switching conditions from a depleting mode to a sustaining mode
US-2017282893-A1 · Oct 5, 2017 · US
Managing shift energy in a transmission of a vehicle
US-9777651-B2 · Oct 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D13/0223?
- CPC F02D13/0223 is the Cooperative Patent Classification code for “Variable control of the intake valves only.”
- How many patents are filed under CPC F02D13/0223 (Variable control of the intake valves only)?
- Our database includes 184 publications tagged with this CPC code.
- Is patent activity under CPC F02D13/0223 growing?
- Publication counts under this code: 8 in 2024 vs 7 in 2025 (latest complete years).