F02D 41/1475
Regulating the air fuel ratio at a value other than stoichiometry
Official title: {Regulating the air fuel ratio at a value other than stoichiometry}
F02D41/1475 (Regulating the air fuel ratio at a value other than stoichiometry) appears on 785 US grants and 597 published applications in this corpus.
Search patents in F02D- Granted patents
- 785
- Published applications
- 597
- Assignees
- 157
- Inventors
- 1,522
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 12 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 13 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 18 | 0 |
| 1996 | 9 | 0 |
| 1997 | 11 | 0 |
| 1998 | 26 | 0 |
| 1999 | 17 | 0 |
| 2000 | 15 | 0 |
| 2001 | 11 | 1 |
| 2002 | 14 | 20 |
| 2003 | 13 | 19 |
| 2004 | 23 | 33 |
| 2005 | 19 | 17 |
| 2006 | 14 | 8 |
| 2007 | 15 | 14 |
| 2008 | 6 | 11 |
| 2009 | 9 | 12 |
| 2010 | 13 | 13 |
| 2011 | 10 | 15 |
| 2012 | 9 | 11 |
| 2013 | 16 | 31 |
| 2014 | 13 | 14 |
| 2015 | 15 | 33 |
| 2016 | 30 | 49 |
| 2017 | 40 | 34 |
| 2018 | 26 | 41 |
| 2019 | 50 | 37 |
| 2020 | 50 | 44 |
| 2021 | 49 | 32 |
| 2022 | 38 | 38 |
| 2023 | 32 | 22 |
| 2024 | 24 | 18 |
| 2025 | 11 | 12 |
| 2026 | 9 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for adaptive control of air-to-fuel ratio18 Aug 2026US 12,710,014 B2Caterpillar Inc.
- Control device for internal combustion engine30 Jun 2026US 12,669,094 B2Toyota Jidosha Kabushiki Kaisha
- Lubricant compositions containing silicon for reduced pre-ignition in hydrogen fueled engines23 Jun 2026US 12,662,648 B2Infineum International Limited
- Methods and systems for modulating engine air-fuel ratio during cylinder imbalance diagnostic26 May 2026US 12,637,990 B1Ford Global Technologies, LLC
- Control method of air fuel ratio for hybrid vehicle and control device of air fuel ratio for hybrid vehicle28 Apr 2026US 12,612,032 B2Nissan Motor Co., Ltd.
- Device and method for controlling oxygen storage amount in three-way catalyst3 Sep 2026US 2026/0258762 A1Nissan Motor Co., Ltd.
- Temperature-controllable glow plug assisted compression ignition methanol engine and control method thereof23 Jul 2026US 2026/0210322 A1Taiyuan University of Technology
- System and method for adaptive control of air-to-fuel ratio18 Jun 2026US 2026/0168452 A1Caterpillar Inc.
- Engine exhaust gas purification apparatus11 Jun 2026US 2026/0160213 A1Mazda Motor Corporation
- Methods and systems for modulating engine air-fuel ratio during cylinder imbalance diagnostic28 May 2026US 2026/0146573 A1Ford Global Technologies, LLC
Most cited
By later US patents
- Method for controlling the level of oxygen stored by a catalyst within a catalytic converter152US 5,842,340 AMotorola, Inc. · 1998
- Exhaust gas purification apparatus for an internal combustion engine149US 5,402,641 AToyota Jidosha Kabushiki Kaisha · 1995
- Exhaust purification device of internal combustion engine131US 5,437,153 AToyota Jidosha Kabushiki Kaisha · 1995
- Exhaust gas purification device for an internal combustion engine114US 5,974,793 AToyota Jidosha Kabushiki Kaisha · 1999
- Exhaust gas aftertreatment systems96US 6,928,806 B2Ford Global Technologies, LLC · 2005