F02D 13/0234
Changing the valve timing only
Official title: {changing the valve timing only}
F02D13/0234 (Changing the valve timing only) appears on 666 US grants and 542 published applications in this corpus.
Search patents in F02D- Granted patents
- 666
- Published applications
- 542
- Assignees
- 126
- Inventors
- 1,166
- 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 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 3 | 0 |
| 1995 | 12 | 0 |
| 1996 | 11 | 0 |
| 1997 | 16 | 0 |
| 1998 | 12 | 0 |
| 1999 | 13 | 0 |
| 2000 | 9 | 0 |
| 2001 | 22 | 8 |
| 2002 | 30 | 30 |
| 2003 | 29 | 11 |
| 2004 | 17 | 17 |
| 2005 | 16 | 16 |
| 2006 | 24 | 30 |
| 2007 | 20 | 17 |
| 2008 | 17 | 23 |
| 2009 | 11 | 28 |
| 2010 | 23 | 36 |
| 2011 | 15 | 23 |
| 2012 | 25 | 30 |
| 2013 | 24 | 18 |
| 2014 | 30 | 23 |
| 2015 | 28 | 40 |
| 2016 | 30 | 24 |
| 2017 | 23 | 30 |
| 2018 | 27 | 30 |
| 2019 | 23 | 18 |
| 2020 | 25 | 25 |
| 2021 | 26 | 22 |
| 2022 | 25 | 17 |
| 2023 | 19 | 16 |
| 2024 | 13 | 4 |
| 2025 | 6 | 6 |
| 2026 | 2 | 0 |
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
- Compression ignition engine, commercial vehicle, and method for improving starting behaviour16 Sep 2025US 12,416,273 B2DAF Trucks N. V.
- Control device and control method for variable valve timing mechanism29 Jul 2025US 12,372,015 B2Hitachi Astemo, Ltd.
- Self-charged four stroke one-cycle combustion cylinder for internal combustion engine29 Jul 2025US 12,372,016 B1
- 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
- Engine control unit calibration13 Mar 2025US 2025/0084803 A1Secondmind Limited
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