F01L 2800/00
Methods of operation using a variable valve timing mechanism
F01L2800/00 (Methods of operation using a variable valve timing mechanism) appears on 1,632 US grants and 1,691 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,632
- Published applications
- 1,691
- Assignees
- 281
- Inventors
- 2,381
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 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 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 30 | 11 |
| 2002 | 43 | 79 |
| 2003 | 63 | 81 |
| 2004 | 84 | 112 |
| 2005 | 100 | 137 |
| 2006 | 110 | 96 |
| 2007 | 98 | 115 |
| 2008 | 92 | 83 |
| 2009 | 60 | 102 |
| 2010 | 68 | 72 |
| 2011 | 68 | 58 |
| 2012 | 64 | 45 |
| 2013 | 46 | 57 |
| 2014 | 47 | 50 |
| 2015 | 61 | 37 |
| 2016 | 46 | 80 |
| 2017 | 47 | 91 |
| 2018 | 84 | 86 |
| 2019 | 82 | 80 |
| 2020 | 91 | 71 |
| 2021 | 50 | 52 |
| 2022 | 55 | 39 |
| 2023 | 42 | 19 |
| 2024 | 29 | 19 |
| 2025 | 16 | 12 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 2800/01StartingIndexing code234
- F01L 2800/11Fault detection, diagnosisIndexing code159
- F01L 2800/03StoppingIndexing code136
- F01L 2800/10Providing exhaust gas recirculation [egr]Indexing code122
- F01L 2800/12Fail safe operationIndexing code113
- F01L 2800/06Timing or lift different for valves of same cylinderIndexing code78
- F01L 2800/08Timing or lift different for valves of different cylindersIndexing code74
- F01L 2800/14Determining a positionIndexing code62
All 18 subgroupsShow fewer
- F01L 2800/13ThrottlelessIndexing code58
- F01L 2800/05Timing control under consideration of oil conditionIndexing code51
- F01L 2800/09CalibratingIndexing code49
- F01L 2800/18Testing or simulationIndexing code33
- F01L 2800/17MaintenanceIndexing code27
- F01L 2800/02Cold runningIndexing code25
- F01L 2800/16Preventing interferenceIndexing code17
- F01L 2800/19Valves opening several times per strokeIndexing code14
- F01L 2800/15Balancing of rotating partsIndexing code11
- F01L 2800/04Timing control at idlingIndexing code6
Recent patents
- Work vehicle compression ignition power system having thermally stratified engine combustion chambers21 Jul 2026US 12,687,133 B2Deere & Company
- Valve opening and closing timing control device2 Jun 2026US 12,644,399 B2Aisin Corporation
- Compliance spring mounting method and assembly26 May 2026US 12,637,965 B2Eaton Intelligent Power Limited
- Control device for hydraulic control valve28 Apr 2026US 12,612,912 B2Hitachi Astemo, Ltd.
- Method to perform rebreathe mode transitions17 Feb 2026US 12,553,398 B2Saudi Arabian Oil Company
- Method to shut down an internal combustion engine27 Aug 2026US 2026/0251095 A1Volvo Truck Corporation
- Hydraulic control valve and method of controlling a hybrid cam phaser30 Jul 2026US 2026/0218632 A1
- System and method for distinguishing between a timing chain jump and a lock-up of an actuator in a variable valve timing device2 Jul 2026US 2026/0185468 A1Vitesco Technologies GmbH
- Oil supply apparatus for engine25 Jun 2026US 2026/0176989 A1Mazda Motor Corporation
- Method for managing a starting phase of a hybrid vehicle5 Feb 2026US 2026/0034992 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Method of operating an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine102US 4,823,825 A1989
- Method of identifying the impact of an armature onto an electromagnet on an electromagnetic switching arrangement85US 5,708,355 AFEV Motorentechnik GmbH · 1998
- Motor/generator unit applicable to automotive vehicle81US 6,184,603 B2Unisia Jecs Corporation · 2001
- Variable valve timing control system80US 6,330,870 B1Denso Corporation · 2001
- Combination starter-generator80US 6,821,223 B2Delphi Technologies, Inc. · 2004