F01N 2900/04
Methods of control or diagnosing
F01N2900/04 (Methods of control or diagnosing) appears on 1,639 US grants and 1,626 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,639
- Published applications
- 1,626
- Assignees
- 310
- Inventors
- 3,025
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 13 | 0 |
| 1993 | 11 | 0 |
| 1994 | 17 | 0 |
| 1995 | 26 | 0 |
| 1996 | 13 | 0 |
| 1997 | 11 | 0 |
| 1998 | 26 | 0 |
| 1999 | 17 | 0 |
| 2000 | 13 | 0 |
| 2001 | 11 | 4 |
| 2002 | 24 | 16 |
| 2003 | 13 | 15 |
| 2004 | 12 | 25 |
| 2005 | 15 | 17 |
| 2006 | 17 | 23 |
| 2007 | 15 | 41 |
| 2008 | 20 | 32 |
| 2009 | 15 | 60 |
| 2010 | 37 | 56 |
| 2011 | 39 | 64 |
| 2012 | 43 | 62 |
| 2013 | 66 | 96 |
| 2014 | 87 | 81 |
| 2015 | 78 | 109 |
| 2016 | 88 | 112 |
| 2017 | 113 | 129 |
| 2018 | 105 | 112 |
| 2019 | 123 | 104 |
| 2020 | 99 | 105 |
| 2021 | 110 | 83 |
| 2022 | 93 | 82 |
| 2023 | 92 | 83 |
| 2024 | 80 | 52 |
| 2025 | 57 | 39 |
| 2026 | 24 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 2900/0422Measuring the elapsed timeIndexing code541
- F01N 2900/0416Using the state of a sensorIndexing code454
- F01N 2900/0408Using a feed-back loopIndexing code223
- F01N 2900/0412Using pre-calibrated maps, tables or chartsIndexing code216
- F01N 2900/0418Using integration or an accumulated value within an elapsed periodIndexing code168
- F01N 2900/0421Using an increment counter when a predetermined event occursIndexing code152
- F01N 2900/0402Using adaptive learningIndexing code93
- F01N 2900/0411Using a feed-forward controlIndexing code84
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
- Estimation method for determining the oxygen storage capacity of a catalytic converter22 Sep 2026US 12,742,408 B2Ferrari S.P. A.
- Internal combustion engine system15 Sep 2026US 12,736,016 B2Toyota Jidosha Kabushiki Kaisha
- Work vehicle and aftertreatment system therefor25 Aug 2026US 12,716,375 B2Deere & Company
- Methods and systems for particulate filter sensor25 Aug 2026US 12,716,378 B1Ford Global Technologies, LLC
- Method for determining condition of exhaust system, and device for determining condition of exhaust system3 Sep 2026US 2026/0258746 A1Nissan Motor Co., Ltd.
- Systems and methods for diesel oxidation catalyst aging prognostics and diagnosis27 Aug 2026US 2026/0249244 A1Cummins Inc.
- Aftertreatment system nox and ammonia control strategy13 Aug 2026US 2026/0235059 A1Cummins Inc.
- Controller and controlling method for exhaust gas treatment system13 Aug 2026US 2026/0235065 A1Ebara Corporation
- Work vehicle and aftertreatment system therefor6 Aug 2026US 2026/0226857 A1Deere & Company
Most cited
By later US patents
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Reducing no.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction171US 6,063,350 AClean Diesel Technologies, Inc. · 2000
- Method for controlling the level of oxygen stored by a catalyst within a catalytic converter152US 5,842,340 AMotorola, Inc. · 1998
- Control system for mobile NOx SCR applications125US 6,415,602 B1Engelhard Corporation · 2002
- System and method for monitoring and detecting faults in a closed-loop system118US 8,700,360 B2Cummins Intellectual Properties, Inc. · 2014