F02D 13/0253
Fully variable control of valve lift and timing using camless actuation systems
Official title: {Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves}
F02D13/0253 (Fully variable control of valve lift and timing using camless actuation systems) appears on 444 US grants and 342 published applications in this corpus.
Search patents in F02D- Granted patents
- 444
- Published applications
- 342
- Assignees
- 103
- Inventors
- 645
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 13 | 0 |
| 1999 | 4 | 0 |
| 2000 | 9 | 0 |
| 2001 | 29 | 22 |
| 2002 | 50 | 41 |
| 2003 | 47 | 32 |
| 2004 | 30 | 29 |
| 2005 | 21 | 45 |
| 2006 | 53 | 38 |
| 2007 | 31 | 18 |
| 2008 | 26 | 22 |
| 2009 | 14 | 15 |
| 2010 | 11 | 7 |
| 2011 | 12 | 11 |
| 2012 | 9 | 7 |
| 2013 | 8 | 4 |
| 2014 | 7 | 7 |
| 2015 | 3 | 1 |
| 2016 | 1 | 4 |
| 2017 | 4 | 5 |
| 2018 | 0 | 10 |
| 2019 | 8 | 0 |
| 2020 | 4 | 3 |
| 2021 | 6 | 10 |
| 2022 | 5 | 4 |
| 2023 | 4 | 5 |
| 2024 | 4 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Camless reciprocating engine control system10 Mar 2026US 12,571,356 B2Adaptive Camless Technology, LLC
- Method for diagnosing a part of a powertrain system10 Jun 2025US 12,326,122 B2Volvo Truck Corporation
- Method of controlling an exhaust valve arrangement25 Mar 2025US 12,258,913 B2Volvo Truck Corporation
- Adaptive any-fuel camless reciprocating engine24 Dec 2024US 12,173,664 B2The Regents of the University of California
- Internal combustion engine powerplant having high efficiency waste energy recovery and distribution18 Jun 2024US 12,012,091 B2Thermal Power Recovery LLC
- Camless reciprocating engine control system20 Feb 2025US 2025/0059925 A1Adaptive Camless Technology, LLC
- Method of controlling an exhaust valve arrangement2 May 2024US 2024/0141840 A1Volvo Truck Corporation
- Adaptive any-fuel camless reciprocating engine30 Nov 2023US 2023/0383705 A1The Regents of the University of California
- Internal combustion engine powerplant having high efficiency waste energy recovery and distribution19 Oct 2023US 2023/0331214 A1Thermal Power Recovery LLC
- Internal combustion engine comprising a decentralized valve-control arrangement and method therefor6 Apr 2023US 2023/0103945 A1Freevalve AB
Most cited
By later US patents
- Valve selection for an engine operating in a multi-stroke cylinder mode179US 7,063,062 B2Ford Global Technologies, LLC · 2006
- Programmed valve system for internal combustion engine169US 4,009,695 A1977
- Engine operation using fully flexible valve and injection events156US 5,117,790 ACaterpillar Inc. · 1992
- System and method for servo control of nonlinear electromagnetic actuators139US 6,208,497 B1Venture Scientifics, LLC · 2001
- Optimized lambda and compression temperature control for compression ignition engines133US 6,273,076 B1Servojet Products International · 2001