F02D 13/0223
Variable control of the intake valves only
Official title: {Variable control of the intake valves only}
F02D13/0223 (Variable control of the intake valves only) appears on 1,154 US grants and 1,027 published applications in this corpus.
Search patents in F02D- Granted patents
- 1,154
- Published applications
- 1,027
- Assignees
- 181
- Inventors
- 1,826
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 13 | 0 |
| 1993 | 13 | 0 |
| 1994 | 5 | 0 |
| 1995 | 15 | 0 |
| 1996 | 14 | 0 |
| 1997 | 19 | 0 |
| 1998 | 15 | 0 |
| 1999 | 16 | 0 |
| 2000 | 15 | 0 |
| 2001 | 31 | 12 |
| 2002 | 38 | 42 |
| 2003 | 36 | 30 |
| 2004 | 33 | 40 |
| 2005 | 39 | 56 |
| 2006 | 51 | 64 |
| 2007 | 49 | 52 |
| 2008 | 48 | 51 |
| 2009 | 31 | 61 |
| 2010 | 48 | 62 |
| 2011 | 30 | 42 |
| 2012 | 48 | 47 |
| 2013 | 41 | 31 |
| 2014 | 44 | 35 |
| 2015 | 43 | 52 |
| 2016 | 42 | 48 |
| 2017 | 37 | 42 |
| 2018 | 45 | 60 |
| 2019 | 46 | 33 |
| 2020 | 46 | 51 |
| 2021 | 53 | 39 |
| 2022 | 39 | 31 |
| 2023 | 33 | 23 |
| 2024 | 22 | 10 |
| 2025 | 14 | 12 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Engine control system for intake valve opening timing during cold start11 Aug 2026US 12,704,099 B2Cummins Power Generation Inc.
- Engine system with combustion control for reducing combustion variations7 Jul 2026US 12,674,428 B2Mazda Motor Corporation
- Oil pan for internal combustion engine3 Mar 2026US 12,565,852 B2Arctic Cat Inc.
- Compression ignition engine, commercial vehicle, and method for improving starting behaviour16 Sep 2025US 12,416,273 B2DAF Trucks N. V.
- Variable valve device9 Sep 2025US 12,410,734 B2Suzuki Motor Corporation
- Oil pan for internal combustion engine9 Jul 2026US 2026/0194004 A1Arctic Cat Inc.
- Engine system with combustion control for reducing combustion variations2 Oct 2025US 2025/0305464 A1Mazda Motor Corporation
- Engine control system for intake valve opening timing during cold start18 Sep 2025US 2025/0290459 A1Cummins Power Generation Inc.
- Rocker system with stopper arrangement on cam side5 Jun 2025US 2025/0179944 A1Eaton Intelligent Power Limited
- Reciprocating piston engine, and method for operating a reciprocating piston engine15 May 2025US 2025/0154908 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Hybrid vehicle employing parallel hybrid system, using both internal combustion engine and electric motor for propulsion182US 6,026,921 ANissan Motor Co., Ltd. · 2000
- Engine operation using fully flexible valve and injection events156US 5,117,790 ACaterpillar Inc. · 1992
- Premixed charge compression ignition engine with optimal combustion control152US 6,230,683 B1Cummins Engine Company, Inc. · 2001
- Multiple operating mode engine and method of operation134US 6,561,157 B2Cummins Inc. · 2003
- Optimized lambda and compression temperature control for compression ignition engines133US 6,273,076 B1Servojet Products International · 2001