F01N 2550/14
Systems for adding secondary air into exhaust
F01N2550/14 (Systems for adding secondary air into exhaust) appears on 156 US grants and 125 published applications in this corpus.
Search patents in F01N- Granted patents
- 156
- Published applications
- 125
- Assignees
- 63
- Inventors
- 327
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 9 |
| 2005 | 6 | 8 |
| 2006 | 9 | 4 |
| 2007 | 4 | 5 |
| 2008 | 2 | 4 |
| 2009 | 3 | 0 |
| 2010 | 3 | 3 |
| 2011 | 4 | 3 |
| 2012 | 2 | 4 |
| 2013 | 1 | 3 |
| 2014 | 4 | 6 |
| 2015 | 6 | 3 |
| 2016 | 4 | 7 |
| 2017 | 5 | 10 |
| 2018 | 3 | 3 |
| 2019 | 8 | 6 |
| 2020 | 3 | 7 |
| 2021 | 7 | 3 |
| 2022 | 7 | 7 |
| 2023 | 9 | 7 |
| 2024 | 8 | 11 |
| 2025 | 12 | 5 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust purification device20 Jan 2026US 12,528,049 B2Mazda Motor Corporation
- Method and device for diagnosing an air supply of an internal combustion engine7 Oct 2025US 12,435,656 B2Robert Bosch GmbH
- Method for ascertaining an operating state of a burner9 Sep 2025US 12,410,740 B2Robert Bosch GmbH
- Internal combustion engine for a motor vehicle, in particular for a motor car9 Sep 2025US 12,410,744 B2Mercedes-Benz Group AG
- Dual function catalyst preheating and EGR system2 Sep 2025US 12,404,793 B1Fca US LLC
- Secondary Air Valve for a Secondary Air System of an Internal Combustion Engine, Internal Combustion Engine and Motor Vehicle30 Jul 2026US 2026/0218643 A1Mercedes-Benz Group AG
- Exhaust purification device28 Aug 2025US 2025/0269326 A1Mazda Motor Corporation
- Method and device for monitoring a secondary air supply in an internal combustion engine15 May 2025US 2025/0154918 A1
- Vehicle3 Apr 2025US 2025/0109727 A1Kawasaki Motors, Ltd.
- Method for ascertaining an operating state of a burner20 Mar 2025US 2025/0092813 A1Robert Bosch GmbH
Most cited
By later US patents
- Emission control system with catalyst warm-up speeding control57US 6,898,927 B2Denso Corporation · 2005
- Apparatus and method for detecting abnormalities in a secondary air supplier33US 5,119,631 AToyota Jidosha Kabushiki Kaisha · 1992
- Malfunction monitoring apparatus and method for secondary air supply system of internal combustion engine31US 5,560,199 AHitachi Automotive Engineering Co., Ltd. · 1996
- Secondary air injection diagnostic system using pressure feedback31US 6,983,590 B2General Motors Corporation · 2006
- Method of detecting failure in a secondary air supply system for internal combustion engines30US 5,140,810 AHonda Giken Kogyo Kabushiki Kaisha · 1992