Method for estimating and controlling the intake efficiency of an internal combustion engine
US-11098665-B2 · Aug 24, 2021 · US
the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related
the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related · 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 | F02D13/023 |
| Official title | {the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related} |
| Display label | the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related |
| Total patents | 71 |
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 | 10 |
| 2016 | 9 |
| 2017 | 7 |
| 2018 | 9 |
| 2019 | 9 |
| 2020 | 11 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for variable actuation of valves of an internal combustion engine
US-2021164368-A1 · Jun 3, 2021 · US
System and method for reducing engine temperature
US-10995682-B1 · May 4, 2021 · US
Boosted engine with boost controller and control unit
US-10914247-B2 · Feb 9, 2021 · US
Continuous variable valve duration apparatus and engine provided with the same
US-2021017885-A1 · Jan 21, 2021 · US
Method for variable position exhaust tuning valve diagnostics
US-10844762-B2 · Nov 24, 2020 · US
Method for Estimating and Controlling the Intake Efficiency of an Internal Combustion Engine
US-2020362781-A1 · Nov 19, 2020 · US
Valve rocker arm assembly, variable air distribution mechanism and engine
US-2020318554-A1 · Oct 8, 2020 · US
Methods of knock control
US-10794302-B2 · Oct 6, 2020 · US
Controller for internal combustion engine and method for controlling internal combustion engine
US-10738728-B2 · Aug 11, 2020 · US
Control system of miller cycle engine and method of controlling miller cycle engine
US-10697378-B2 · Jun 30, 2020 · US
Control device for internal combustion engine
US-10683818-B2 · Jun 16, 2020 · US
Torque modulation for internal combustion engine
US-10612475-B2 · Apr 7, 2020 · US
Control device for internal combustion engine
US-10584649-B2 · Mar 10, 2020 · US
Control system of miller cycle engine and method of controlling miller cycle engine
US-2020072135-A1 · Mar 5, 2020 · US
Controller for internal combustion engine and method for controlling internal combustion engine
US-2020049097-A1 · Feb 13, 2020 · US
Control device for internal combustion engine
US-10502154-B2 · Dec 10, 2019 · US
Method to perform intake cam lift state transitions
US-10352253-B2 · Jul 16, 2019 · US
Method for operating an internal combustion engine
US-10316764-B2 · Jun 11, 2019 · US
Oil control valve system for valve actuation switching
US-10302024-B2 · May 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D13/023?
- CPC F02D13/023 is the Cooperative Patent Classification code for “the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related.”
- How many patents are filed under CPC F02D13/023 (the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related)?
- Our database includes 71 publications tagged with this CPC code.
- Is patent activity under CPC F02D13/023 growing?
- Publication counts under this code: 1 in 2023 vs 1 in 2024 (latest complete years).