F01N 3/306
Preheating additional air
Official title: {Preheating additional air}
F01N3/306 (Preheating additional air) appears on 93 US grants and 51 published applications in this corpus.
Search patents in F01N- Granted patents
- 93
- Published applications
- 51
- Assignees
- 68
- Inventors
- 218
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 3 |
| 2012 | 0 | 3 |
| 2013 | 2 | 1 |
| 2014 | 2 | 1 |
| 2015 | 4 | 5 |
| 2016 | 1 | 3 |
| 2017 | 5 | 5 |
| 2018 | 4 | 2 |
| 2019 | 4 | 0 |
| 2020 | 0 | 3 |
| 2021 | 2 | 0 |
| 2022 | 3 | 3 |
| 2023 | 3 | 3 |
| 2024 | 4 | 3 |
| 2025 | 2 | 3 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual function catalyst preheating and EGR system2 Sep 2025US 12,404,793 B1Fca US LLC
- Method and device for operating an internal combustion engine28 Jan 2025US 12,209,527 B2Robert Bosch GmbH
- Gas introduction assembly for introducing gas, in particular air, into an exhaust gas system of an internal combustion engine31 Dec 2024US 12,180,875 B2Purem GmbH
- Exhaust gas system unit12 Nov 2024US 12,140,061 B1Tenneco Inc.
- Internal-combustion-engine warm-up apparatus16 Apr 2024US 11,959,409 B2Isuzu Motors Limited
- Engine system having recuperated catalyst in exhaust system and method20 Aug 2026US 2026/0243186 A1Caterpillar Inc.
- Feeding and exhaust system for internal combustion engine, or thermal unit, and respective method of operation13 Aug 2026US 2026/0235064 A1Rhapis S.R.L.
- Nozzle designs for secondary air injection in exhaust aftertreatment systems with electrical heaters9 Jul 2026US 2026/0194000 A1Corning Incorporated
- Enhanced operation of hydrogen and ammonia engines11 Dec 2025US 2025/0376937 A1
- Systems and methods for zero nox emissions during an operating period30 Oct 2025US 2025/0334091 A1Cummins Inc.
Most cited
By later US patents
- 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
- Start up system for hydrogen generator used with an internal combustion engine63US 4,033,133 ACalifornia Institute of Technology · 1977
- Internal combustion engine with afterburning and catalytic reaction in a supercharger turbine casing52US 4,122,673 A1978
- Arrangement for an after treatment of exhaust gases from an internal combustion engine47US 5,606,856 ARobert Bosch GmbH · 1997
- Exhaust gas purifier46US 5,716,586 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1998