F02D 41/0052
Feedback control of engine parameters
Official title: {Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount}
F02D41/0052 (Feedback control of engine parameters) appears on 523 US grants and 505 published applications in this corpus.
Search patents in F02D- Granted patents
- 523
- Published applications
- 505
- Assignees
- 132
- Inventors
- 1,131
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 1 |
| 2002 | 7 | 5 |
| 2003 | 7 | 8 |
| 2004 | 6 | 9 |
| 2005 | 5 | 12 |
| 2006 | 17 | 13 |
| 2007 | 12 | 14 |
| 2008 | 10 | 13 |
| 2009 | 4 | 11 |
| 2010 | 11 | 10 |
| 2011 | 11 | 25 |
| 2012 | 12 | 20 |
| 2013 | 14 | 21 |
| 2014 | 14 | 40 |
| 2015 | 24 | 44 |
| 2016 | 36 | 43 |
| 2017 | 49 | 43 |
| 2018 | 44 | 38 |
| 2019 | 48 | 43 |
| 2020 | 49 | 31 |
| 2021 | 35 | 24 |
| 2022 | 16 | 12 |
| 2023 | 16 | 12 |
| 2024 | 10 | 5 |
| 2025 | 5 | 5 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for adaptive control of air-to-fuel ratio18 Aug 2026US 12,710,014 B2Caterpillar Inc.
- System and method for adaptive control of ammonia-NOx ratio28 Jul 2026US 12,692,810 B2Caterpillar Inc.
- Sensor system and method14 Jul 2026US 12,680,516 B2Transportation IP Holdings, LLC
- Systems and methods for reducing emissions21 Apr 2026US 12,607,153 B2General Electric Company
- Engine14 Oct 2025US 12,442,340 B2Yanmar Holdings Co., Ltd.
- System and method for adaptive control of ammonia-nox ratio18 Jun 2026US 2026/0168418 A1Caterpillar Inc.
- System and method for adaptive control of air-to-fuel ratio18 Jun 2026US 2026/0168452 A1Caterpillar Inc.
- Controller for vehicle14 May 2026US 2026/0132751 A1Toyota Jidosha Kabushiki Kaisha
- Engine controller25 Dec 2025US 2025/0389232 A1Subaru Corporation
- Exhaust gas recirculation system for engine11 Dec 2025US 2025/0376958 A1Mazda Motor Corporation
Most cited
By later US patents
- Low emission, diesel-cycle engine158US 6,470,682 B2The United States of America as represented by the Administrator of the United States Environmental Protection Agency · 2002
- Control system for exhaust gas recovery system in an internal combustion engine151US 5,771,867 ACaterpillar Inc. · 1998
- Low emission, diesel-cycle engine146US 6,301,888 B1The United States of America as represented by the Administrator of the Environmental Protection Agency · 2001
- Controlled temperature combustion engine113US 6,651,432 B1The United States of America as represented by the Administrator of the Environmental Protection Agency · 2003
- Control method for turbocharged diesel engines having exhaust gas recirculation99US 6,035,640 AFord Global Technologies, LLC · 2000