F02D 41/04
Introducing corrections for particular operating conditions
Official title: Introducing corrections for particular operating conditions (F02D41/14 takes precedence)
F02D41/04 (Introducing corrections for particular operating conditions) appears on 8,428 US grants and 7,230 published applications in this corpus.
Search patents in F02D- Granted patents
- 8,428
- Published applications
- 7,230
- Assignees
- 848
- Inventors
- 12,143
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 9 | 0 |
| 1978 | 17 | 0 |
| 1979 | 14 | 0 |
| 1980 | 37 | 0 |
| 1981 | 26 | 0 |
| 1982 | 37 | 0 |
| 1983 | 47 | 0 |
| 1984 | 69 | 0 |
| 1985 | 99 | 0 |
| 1986 | 66 | 0 |
| 1987 | 87 | 0 |
| 1988 | 85 | 0 |
| 1989 | 79 | 0 |
| 1990 | 84 | 0 |
| 1991 | 95 | 0 |
| 1992 | 79 | 0 |
| 1993 | 70 | 0 |
| 1994 | 55 | 0 |
| 1995 | 68 | 0 |
| 1996 | 86 | 0 |
| 1997 | 91 | 0 |
| 1998 | 119 | 0 |
| 1999 | 106 | 0 |
| 2000 | 102 | 0 |
| 2001 | 112 | 55 |
| 2002 | 147 | 177 |
| 2003 | 202 | 217 |
| 2004 | 218 | 258 |
| 2005 | 238 | 267 |
| 2006 | 242 | 226 |
| 2007 | 221 | 263 |
| 2008 | 182 | 260 |
| 2009 | 162 | 321 |
| 2010 | 233 | 296 |
| 2011 | 205 | 277 |
| 2012 | 222 | 286 |
| 2013 | 256 | 369 |
| 2014 | 282 | 350 |
| 2015 | 327 | 428 |
| 2016 | 368 | 478 |
| 2017 | 448 | 468 |
| 2018 | 479 | 469 |
| 2019 | 506 | 433 |
| 2020 | 454 | 355 |
| 2021 | 364 | 279 |
| 2022 | 336 | 233 |
| 2023 | 224 | 160 |
| 2024 | 171 | 114 |
| 2025 | 125 | 106 |
| 2026 | 64 | 85 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02D 41/06For engine starting or warming up3,349
- F02D 41/12For deceleration1,732
- F02D 41/042For stopping the engine1,460
- F02D 41/10For acceleration1,195
- F02D 41/08For idling1,078
- F02D 41/047Taking into account fuel evaporation or wall wetting477
- F02D 41/045Detection of accelerating or decelerating state423
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- Method for emission management for a hydrogen vehicle1 Oct 2026US 2026/0298164 A1Phinia Delphi Luxembourg Sarl
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Most cited
By later US patents
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