Method for starting an internal combustion engine comprising a camshaft associated with an electric variable valve timing device
US-2026028940-A1 · Jan 29, 2026 · US
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actuated by solenoids
actuated by solenoids · 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 | F01L9/21 |
| Official title | actuated by solenoids |
| Display label | actuated by solenoids |
| Total patents | 20 |
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 | 1 |
| 2018 | 1 |
| 2020 | 2 |
| 2021 | 7 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine brake system for an internal combustion engine
US-2025369398-A1 · Dec 4, 2025 · US
Engine brake system for an internal combustion engine
US-12486807-B1 · Dec 2, 2025 · US
Deactivating valvetrain assembly
US-12173630-B2 · Dec 24, 2024 · US
Direct-acting solenoid having variable triggering timing for electro-mechanical valvetrain and actuation levers for switching rocker arms
US-11982211-B2 · May 14, 2024 · US
Deactivating Valvetrain Assembly
US-2024084723-A1 · Mar 14, 2024 · US
Cam Phase Actuator Control Systems and Methods
US-2023050408-A1 · Feb 16, 2023 · US
Actuator control system for bi-stable electric rocker arm latches
US-11274579-B2 · Mar 15, 2022 · US
Valve drive device with switchover device
US-11236646-B2 · Feb 1, 2022 · US
Electromagnetic actuator
US-2021343461-A1 · Nov 4, 2021 · US
Fuel injection control device and fuel injection control method
US-11149598-B2 · Oct 19, 2021 · US
Valve drive device with switchover device
US-2021254516-A1 · Aug 19, 2021 · US
Direct-acting solenoid having variable triggering timing for electro-mechanical valvetrain and actuation levers for switching rocker arms
US-2021246812-A1 · Aug 12, 2021 · US
Actuator control system for bi-stable electric rocker arm latches
US-2021189920-A1 · Jun 24, 2021 · US
Linear actuator for valve control and operating systems and methods
US-11004587-B2 · May 11, 2021 · US
Electromagnetic actuator
US-10902985-B2 · Jan 26, 2021 · US
Fuel injection control device and fuel injection control method
US-2020157980-A1 · May 21, 2020 · US
Linear actuator for valve control and operating systems and methods
US-2020020472-A1 · Jan 16, 2020 · US
Electromagnetic actuator
US-2018315533-A1 · Nov 1, 2018 · US
Electromagnetic actuating device
US-9074496-B2 · Jul 7, 2015 · US