F02D 41/1454
The characteristics being an oxygen content or concentration or the air-fuel ratio
Official title: {the characteristics being an oxygen content or concentration or the air-fuel ratio}
F02D41/1454 (The characteristics being an oxygen content or concentration or the air-fuel ratio) appears on 2,940 US grants and 2,557 published applications in this corpus.
Search patents in F02D- Granted patents
- 2,940
- Published applications
- 2,557
- Assignees
- 393
- Inventors
- 4,371
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 9 | 0 |
| 1980 | 12 | 0 |
| 1981 | 10 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 14 | 0 |
| 1988 | 21 | 0 |
| 1989 | 15 | 0 |
| 1990 | 16 | 0 |
| 1991 | 8 | 0 |
| 1992 | 15 | 0 |
| 1993 | 19 | 0 |
| 1994 | 15 | 0 |
| 1995 | 23 | 0 |
| 1996 | 29 | 0 |
| 1997 | 39 | 0 |
| 1998 | 63 | 0 |
| 1999 | 47 | 0 |
| 2000 | 55 | 0 |
| 2001 | 75 | 24 |
| 2002 | 85 | 96 |
| 2003 | 86 | 130 |
| 2004 | 117 | 102 |
| 2005 | 87 | 77 |
| 2006 | 97 | 79 |
| 2007 | 74 | 90 |
| 2008 | 55 | 83 |
| 2009 | 61 | 105 |
| 2010 | 79 | 86 |
| 2011 | 77 | 119 |
| 2012 | 73 | 106 |
| 2013 | 101 | 125 |
| 2014 | 100 | 109 |
| 2015 | 112 | 153 |
| 2016 | 123 | 183 |
| 2017 | 167 | 165 |
| 2018 | 168 | 172 |
| 2019 | 190 | 128 |
| 2020 | 153 | 112 |
| 2021 | 143 | 92 |
| 2022 | 90 | 65 |
| 2023 | 70 | 51 |
| 2024 | 47 | 29 |
| 2025 | 33 | 27 |
| 2026 | 16 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for lambda control of spark-ignition engines, and motor vehicle29 Sep 2026US 12,747,711 B2Schaeffler Technologies AG & Co. KG
- Internal combustion engine system15 Sep 2026US 12,736,016 B2Toyota Jidosha Kabushiki Kaisha
- Input control based on atmospheric oxygen15 Sep 2026US 12,736,509 B2
- System and method for adaptive control of air-to-fuel ratio18 Aug 2026US 12,710,014 B2Caterpillar Inc.
- System and method for balancing outputs from multiple cylinder banks of an internal combustion engine14 Jul 2026US 12,680,517 B2Cummins Inc.
- Controller and control method1 Oct 2026US 2026/0298166 A1Toyota Jidosha Kabushiki Kaisha
- Input control based on atmospheric oxygen1 Oct 2026US 2026/0298898 A1
- Methods and systems for controlling an engine following a fuel cut-off event17 Sep 2026US 2026/0275929 A1Ford Global Technologies, LLC
- Internal combustion engine17 Sep 2026US 2026/0275930 A1
- Control Device10 Sep 2026US 2026/0266236 A1Astemo, Ltd.
Most cited
By later US patents
- Internal combustion engine control for improved fuel efficiency208US 7,577,511 B1Tula Technology, Inc. · 2009
- Optimized lambda and compression temperature control for compression ignition engines133US 6,273,076 B1Servojet Products International · 2001
- Air/fuel control with on-board emission measurement118US 5,452,576 AFord Motor Company · 1995
- Controlled temperature combustion engine113US 6,651,432 B1The United States of America as represented by the Administrator of the Environmental Protection Agency · 2003
- Method for monitoring the performance of a NO.sub.x trap110US 5,771,685 AFord Global Technologies, LLC · 1998