F02D 41/1441
Plural sensors
Official title: {Plural sensors}
F02D41/1441 (Plural sensors) appears on 1,449 US grants and 1,100 published applications in this corpus.
Search patents in F02D- Granted patents
- 1,449
- Published applications
- 1,100
- Assignees
- 221
- Inventors
- 2,144
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 15 | 0 |
| 1990 | 9 | 0 |
| 1991 | 10 | 0 |
| 1992 | 24 | 0 |
| 1993 | 22 | 0 |
| 1994 | 28 | 0 |
| 1995 | 39 | 0 |
| 1996 | 24 | 0 |
| 1997 | 34 | 0 |
| 1998 | 50 | 0 |
| 1999 | 33 | 0 |
| 2000 | 38 | 0 |
| 2001 | 43 | 10 |
| 2002 | 47 | 61 |
| 2003 | 61 | 67 |
| 2004 | 57 | 66 |
| 2005 | 47 | 36 |
| 2006 | 41 | 40 |
| 2007 | 34 | 51 |
| 2008 | 23 | 39 |
| 2009 | 30 | 40 |
| 2010 | 28 | 30 |
| 2011 | 36 | 61 |
| 2012 | 44 | 52 |
| 2013 | 44 | 60 |
| 2014 | 46 | 39 |
| 2015 | 47 | 49 |
| 2016 | 44 | 83 |
| 2017 | 71 | 47 |
| 2018 | 55 | 47 |
| 2019 | 57 | 42 |
| 2020 | 55 | 60 |
| 2021 | 52 | 24 |
| 2022 | 40 | 24 |
| 2023 | 18 | 18 |
| 2024 | 22 | 13 |
| 2025 | 21 | 16 |
| 2026 | 8 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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.
- Feedback fuel control for dual path exhaust system30 Jun 2026US 12,669,098 B2Ford Global Technologies, LLC
- Methods and systems for modulating engine air-fuel ratio during cylinder imbalance diagnostic26 May 2026US 12,637,990 B1Ford Global Technologies, LLC
- Method for operating a drive device and corresponding drive device17 Mar 2026US 12,577,896 B2Audi AG
- Control Device10 Sep 2026US 2026/0266236 A1Astemo, Ltd.
- Detonation detection2 Jul 2026US 2026/0185902 A1Caterpillar Inc.
- System and method for adaptive control of air-to-fuel ratio18 Jun 2026US 2026/0168452 A1Caterpillar Inc.
- Methods and systems for diagnosing four oxygen sensor system18 Jun 2026US 2026/0168456 A1Ford Global Technologies, LLC
- Engine catalyst diagnosis apparatus11 Jun 2026US 2026/0160194 A1Mazda Motor Corporation
Most cited
By later US patents
- Method and apparatus for desulfating a no.sub.x trap176US 5,974,788 AFord Global Technologies, LLC · 1999
- Method for controlling the level of oxygen stored by a catalyst within a catalytic converter152US 5,842,340 AMotorola, Inc. · 1998
- Method and apparatus to limit a midbed temperature of a catalytic converter131US 5,414,994 AFord Motor Company · 1995
- Air/fuel control with on-board emission measurement118US 5,452,576 AFord Motor Company · 1995
- Method and apparatus for monitoring and adjusting .lambda.-probe-controlled catalytic exhaust gas emission control systems of internal combustion engines114US 4,622,809 ADaimler-Benz Aktiengesellschaft · 1986