F01N 2900/0408
Using a feed-back loop
Official title: using a feed-back loop
F01N2900/0408 (Using a feed-back loop) appears on 223 US grants and 255 published applications in this corpus.
Search patents in F01N- Granted patents
- 223
- Published applications
- 255
- Assignees
- 103
- Inventors
- 566
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 3 |
| 2007 | 0 | 2 |
| 2008 | 0 | 7 |
| 2009 | 2 | 26 |
| 2010 | 5 | 23 |
| 2011 | 13 | 11 |
| 2012 | 17 | 10 |
| 2013 | 17 | 19 |
| 2014 | 12 | 9 |
| 2015 | 12 | 16 |
| 2016 | 16 | 19 |
| 2017 | 16 | 19 |
| 2018 | 19 | 12 |
| 2019 | 15 | 15 |
| 2020 | 9 | 6 |
| 2021 | 12 | 13 |
| 2022 | 10 | 13 |
| 2023 | 19 | 15 |
| 2024 | 15 | 7 |
| 2025 | 5 | 3 |
| 2026 | 5 | 3 |
By publication year. 2026 runs to 8 Oct.
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
- Systems and methods for compensating NOx sensor measurements to meet sufficiency requirements10 Mar 2026US 12,571,337 B2Cummins Inc.
- Aftertreatment system, dual fuel system, and methods therefor6 Jan 2026US 12,516,619 B2Cummins Power Generation Inc.
- Systems and methods for diagnosing NOx sensor based on ammonia slip6 Jan 2026US 12,516,620 B2Cummins Inc.
- Aftertreatment system, dual fuel system, and methods therefor30 Apr 2026US 2026/0117688 A1Cummins Power Generation Inc.
- Internal combustion engine system30 Apr 2026US 2026/0117720 A1Toyota Jidosha Kabushiki Kaisha
- Dual scr system and control method thereof2 Apr 2026US 2026/0092548 A1Hd Hyundai Infracore Co., Ltd.
- Enhanced operation of hydrogen and ammonia engines11 Dec 2025US 2025/0376937 A1
- Apparatus and method for lambda control of spark-ignition engines, and motor vehicle22 May 2025US 2025/0163864 A1Audi AG
Most cited
By later US patents
- System and method for monitoring and detecting faults in a closed-loop system118US 8,700,360 B2Cummins Intellectual Properties, Inc. · 2014
- Control of selective catalytic reduction81US 8,578,705 B2Ricardo UK Limited · 2013
- Exhaust gas aftertreatment systems71US 7,093,427 B2Ford Global Technologies, LLC · 2006
- Method and system for NOx reduction61US 6,427,439 B1Ford Global Technologies, LLC · 2002
- Mobile diesel selective catalytic reduction systems and methods37US 6,941,746 B2Combustion Components Associates, Inc. · 2005