F02D 13/0257
Independent control of two or more intake or exhaust valves respectively, i.e.
Official title: {Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened}
F02D13/0257 (Independent control of two or more intake or exhaust valves respectively, i.e.) appears on 357 US grants and 325 published applications in this corpus.
Search patents in F02D- Granted patents
- 357
- Published applications
- 325
- Assignees
- 104
- Inventors
- 591
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 3 |
| 2002 | 15 | 8 |
| 2003 | 11 | 9 |
| 2004 | 10 | 11 |
| 2005 | 5 | 23 |
| 2006 | 17 | 14 |
| 2007 | 21 | 16 |
| 2008 | 11 | 16 |
| 2009 | 9 | 16 |
| 2010 | 11 | 18 |
| 2011 | 16 | 17 |
| 2012 | 10 | 24 |
| 2013 | 23 | 16 |
| 2014 | 18 | 9 |
| 2015 | 14 | 5 |
| 2016 | 9 | 15 |
| 2017 | 8 | 10 |
| 2018 | 20 | 31 |
| 2019 | 15 | 24 |
| 2020 | 21 | 17 |
| 2021 | 18 | 7 |
| 2022 | 8 | 5 |
| 2023 | 10 | 3 |
| 2024 | 2 | 4 |
| 2025 | 4 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oil pan for internal combustion engine3 Mar 2026US 12,565,852 B2Arctic Cat Inc.
- Two-step cam controlled exhaust valve deactivation to operate a divided exhaust boost system24 Jun 2025US 12,338,752 B2Saudi Arabian Oil Company
- Method of controlling an exhaust valve arrangement25 Mar 2025US 12,258,913 B2Volvo Truck Corporation
- Method for operating an internal combustion engine, in particular of a motor vehicle25 Mar 2025US 12,258,914 B2Daimler Truck AG
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other11 Mar 2025US 12,247,502 B2C. R. F. Societa Consortile per Azioni
- Engine control device, vehicle, engine control program, and engine control method13 Aug 2026US 2026/0235087 A1Isuzu Motors Limited
- Oil pan for internal combustion engine9 Jul 2026US 2026/0194004 A1Arctic Cat Inc.
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other16 Jan 2025US 2025/0020072 A1C. R. F. Societa Consortile per Azioni
- Engine braking with fuel injection for internal combustion engines16 Jan 2025US 2025/0020084 A1Cummins Inc.
- Active method for cold start emissions reduction8 Aug 2024US 2024/0263597 A1Hyundai Motor Company
Most cited
By later US patents
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- Valve selection for an engine operating in a multi-stroke cylinder mode179US 7,063,062 B2Ford Global Technologies, LLC · 2006
- Combustion engine having exhaust gas recirculation137US 6,742,506 B1Saab Automobile AB · 2004
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Engine air-fuel control for an engine with valves that may be deactivated98US 7,032,581 B2Ford Global Technologies, LLC · 2006