F02D 41/068
For warming-up
Official title: {for warming-up}
F02D41/068 (For warming-up) appears on 410 US grants and 335 published applications in this corpus.
Search patents in F02D- Granted patents
- 410
- Published applications
- 335
- Assignees
- 103
- Inventors
- 983
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 9 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 8 |
| 2003 | 5 | 12 |
| 2004 | 13 | 5 |
| 2005 | 9 | 8 |
| 2006 | 6 | 9 |
| 2007 | 9 | 8 |
| 2008 | 6 | 12 |
| 2009 | 9 | 10 |
| 2010 | 8 | 15 |
| 2011 | 8 | 12 |
| 2012 | 14 | 14 |
| 2013 | 10 | 12 |
| 2014 | 8 | 11 |
| 2015 | 10 | 15 |
| 2016 | 11 | 18 |
| 2017 | 15 | 20 |
| 2018 | 25 | 26 |
| 2019 | 26 | 24 |
| 2020 | 17 | 22 |
| 2021 | 25 | 24 |
| 2022 | 22 | 16 |
| 2023 | 19 | 10 |
| 2024 | 11 | 9 |
| 2025 | 11 | 10 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method to enhance the performance of a heavy-duty diesel-H2 dual-fuel engine through engine system optimization22 Sep 2026US 12,742,429 B2Saudi Arabian Oil Company
- Method to enhance the performance of a heavy-duty diesel-H2 dual-fuel engine through engine system optimization22 Sep 2026US 12,742,430 B2Saudi Arabian Oil Company
- Engine control system for intake valve opening timing during cold start11 Aug 2026US 12,704,099 B2Cummins Power Generation Inc.
- Control apparatus for engine14 Apr 2026US 12,601,306 B2Mazda Motor Corporation
- Methods and apparatus for mitigating fuel in oil16 Dec 2025US 12,497,022 B2Jaguar Land Rover Limited
- Method for operating a drive device for a motor vehicle and corresponding drive device27 Aug 2026US 2026/0251101 A1Audi AG
- Engine control device, vehicle, engine control program, and engine control method13 Aug 2026US 2026/0235087 A1Isuzu Motors Limited
- Engine power generation system control device2 Apr 2026US 2026/0092569 A1Hitachi, Ltd.
- Engine system26 Feb 2026US 2026/0055735 A1Subaru Corporation
- Engine control system for intake valve opening timing during cold start18 Sep 2025US 2025/0290459 A1Cummins Power Generation Inc.
Most cited
By later US patents
- Internal combustion engine control for improved fuel efficiency208US 7,577,511 B1Tula Technology, Inc. · 2009
- System and method for engine fuel blend control110US 7,287,492 B2Ford Global Technologies, LLC · 2007
- Internal combustion engine control for improved fuel efficiency97US 8,131,447 B2Tula Technology, Inc. · 2012
- Process for controlling a multiple cylinder internal combustion engine in the cold start and warming up phases95US 5,930,992 AFEV Motorentechnik GmbH & Co. Kommanditgesellschaft · 1999
- Hybrid thermal energy conversion for HCCI heated intake charge system67US 7,621,262 B2Ford Global Technologies, LLC · 2009