F01N 2430/06
Influencing exhaust purification: by varying fuel-air ratio
Official title: by varying fuel-air ratio, e.g. by enriching fuel-air mixture
F01N2430/06 (Influencing exhaust purification: by varying fuel-air ratio) appears on 738 US grants and 657 published applications in this corpus.
Search patents in F01N- Granted patents
- 738
- Published applications
- 657
- Assignees
- 167
- Inventors
- 1,448
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 18 | 0 |
| 2000 | 17 | 0 |
| 2001 | 16 | 4 |
| 2002 | 17 | 8 |
| 2003 | 16 | 28 |
| 2004 | 19 | 40 |
| 2005 | 25 | 29 |
| 2006 | 29 | 22 |
| 2007 | 24 | 16 |
| 2008 | 7 | 12 |
| 2009 | 8 | 11 |
| 2010 | 13 | 12 |
| 2011 | 7 | 13 |
| 2012 | 13 | 12 |
| 2013 | 11 | 14 |
| 2014 | 15 | 14 |
| 2015 | 13 | 27 |
| 2016 | 24 | 46 |
| 2017 | 41 | 45 |
| 2018 | 34 | 61 |
| 2019 | 64 | 62 |
| 2020 | 58 | 66 |
| 2021 | 65 | 34 |
| 2022 | 38 | 27 |
| 2023 | 30 | 23 |
| 2024 | 23 | 12 |
| 2025 | 14 | 9 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Internal combustion engine system15 Sep 2026US 12,736,016 B2Toyota Jidosha Kabushiki Kaisha
- System and method for adaptive control of air-to-fuel ratio18 Aug 2026US 12,710,014 B2Caterpillar Inc.
- System and method for adaptive control of ammonia-NOx ratio28 Jul 2026US 12,692,810 B2Caterpillar Inc.
- Purification system21 Jul 2026US 12,687,123 B2Isuzu Motors Limited
- System and method for adaptive control of ammonia-nox ratio18 Jun 2026US 2026/0168418 A1Caterpillar Inc.
- System and method for adaptive control of air-to-fuel ratio18 Jun 2026US 2026/0168452 A1Caterpillar Inc.
- Engine exhaust gas purification apparatus11 Jun 2026US 2026/0160193 A1Mazda Motor Corporation
- Engine exhaust gas purification apparatus11 Jun 2026US 2026/0160213 A1Mazda Motor Corporation
- Internal combustion engine system30 Apr 2026US 2026/0117719 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Exhaust purification device of internal combustion engine199US 5,473,887 AToyota Jidosha Kabushiki Kaisha · 1995
- Apparatus and method for internal combustion engine control173US 5,657,625 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1997
- Exhaust gas purification apparatus for an internal combustion engine149US 5,402,641 AToyota Jidosha Kabushiki Kaisha · 1995
- Method for purifying exhaust gas of a diesel engine146US 5,746,989 AToyota Jidosha Kabushiki Kaisha · 1998
- Method and apparatus to limit a midbed temperature of a catalytic converter131US 5,414,994 AFord Motor Company · 1995