F02D 41/2451
Characterised by what is learned or calibrated
Official title: {characterised by what is learned or calibrated}
F02D41/2451 (Characterised by what is learned or calibrated) appears on 2,458 US grants and 2,016 published applications in this corpus.
Search patents in F02D- Granted patents
- 2,458
- Published applications
- 2,016
- Assignees
- 349
- Inventors
- 4,110
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 16 | 0 |
| 1984 | 16 | 0 |
| 1985 | 24 | 0 |
| 1986 | 19 | 0 |
| 1987 | 17 | 0 |
| 1988 | 31 | 0 |
| 1989 | 31 | 0 |
| 1990 | 27 | 0 |
| 1991 | 34 | 0 |
| 1992 | 31 | 0 |
| 1993 | 36 | 0 |
| 1994 | 20 | 0 |
| 1995 | 20 | 0 |
| 1996 | 31 | 0 |
| 1997 | 33 | 0 |
| 1998 | 41 | 0 |
| 1999 | 26 | 0 |
| 2000 | 37 | 0 |
| 2001 | 46 | 16 |
| 2002 | 50 | 37 |
| 2003 | 54 | 70 |
| 2004 | 61 | 71 |
| 2005 | 59 | 63 |
| 2006 | 83 | 69 |
| 2007 | 67 | 67 |
| 2008 | 56 | 79 |
| 2009 | 46 | 135 |
| 2010 | 79 | 104 |
| 2011 | 83 | 83 |
| 2012 | 68 | 87 |
| 2013 | 78 | 87 |
| 2014 | 59 | 73 |
| 2015 | 71 | 130 |
| 2016 | 111 | 127 |
| 2017 | 129 | 118 |
| 2018 | 123 | 129 |
| 2019 | 153 | 115 |
| 2020 | 129 | 89 |
| 2021 | 118 | 93 |
| 2022 | 91 | 53 |
| 2023 | 45 | 37 |
| 2024 | 45 | 36 |
| 2025 | 27 | 20 |
| 2026 | 16 | 28 |
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.
- Injector valve force control11 Aug 2026US 12,704,100 B2Caterpillar Inc.
- Dual fuel engine system and method for controlling dual fuel engine system30 Jun 2026US 12,669,093 B2Cummins Power Generation Inc.
- Method for actuating an injector, and control unit23 Jun 2026US 12,662,973 B2Robert Bosch GmbH
- Diagnosing and remediating fuel injection drift utilizing fuel rail pressure measurements19 May 2026US 12,631,153 B2Caterpillar Inc.
- Non-intrusive fueling event measurement for fueling systems8 Oct 2026US 2026/0309103 A1Cummins-Scania HPCR System, LLC
- Internal Combustion Engine Control Device and Internal Combustion Engine Control Method20 Aug 2026US 2026/0243213 A1Astemo, Ltd.
- System and related method for fuel injection systems13 Aug 2026US 2026/0235096 A1Caterpillar Inc.
- Method for controlling an execution of functions during the operation of an internal combustion engine23 Jul 2026US 2026/0210309 A1
- System and method for adaptive control of air-to-fuel ratio18 Jun 2026US 2026/0168452 A1Caterpillar Inc.
Most cited
By later US patents
- Exhaust gas control using a spark plug ionization signal198US 6,980,903 B2Visteon Global Technologies, Inc. · 2005
- Fuel control system with calibration learning capability for motor vehicle internal combustion engine137US 4,130,095 AGeneral Motors Corporation · 1978
- System and method for engine fuel blend control110US 7,287,492 B2Ford Global Technologies, LLC · 2007
- Method and apparatus for improving engine fuel economy103US 5,778,666 AFord Global Technologies, LLC · 1998
- Closed loop control for desulfating a NO.sub.x trap92US 5,983,627 AFord Global Technologies, LLC · 1999