F02D 41/0047
Controlling exhaust gas recirculation [egr]
Official title: {Controlling exhaust gas recirculation [EGR] (temperature control with cooler in recirculation circuit F02M26/33)}
F02D41/0047 (Controlling exhaust gas recirculation [egr]) appears on 3,840 US grants and 3,553 published applications in this corpus.
Search patents in F02D- Granted patents
- 3,840
- Published applications
- 3,553
- Assignees
- 437
- Inventors
- 5,499
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 11 | 0 |
| 1980 | 16 | 0 |
| 1981 | 21 | 0 |
| 1982 | 18 | 0 |
| 1983 | 25 | 0 |
| 1984 | 49 | 0 |
| 1985 | 16 | 0 |
| 1986 | 12 | 0 |
| 1987 | 12 | 0 |
| 1988 | 21 | 0 |
| 1989 | 10 | 0 |
| 1990 | 7 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 22 | 0 |
| 1994 | 15 | 0 |
| 1995 | 12 | 0 |
| 1996 | 31 | 0 |
| 1997 | 26 | 0 |
| 1998 | 32 | 0 |
| 1999 | 43 | 0 |
| 2000 | 78 | 0 |
| 2001 | 71 | 31 |
| 2002 | 70 | 91 |
| 2003 | 92 | 100 |
| 2004 | 102 | 118 |
| 2005 | 106 | 114 |
| 2006 | 135 | 127 |
| 2007 | 111 | 118 |
| 2008 | 87 | 133 |
| 2009 | 65 | 154 |
| 2010 | 104 | 124 |
| 2011 | 104 | 174 |
| 2012 | 115 | 166 |
| 2013 | 133 | 213 |
| 2014 | 136 | 215 |
| 2015 | 180 | 261 |
| 2016 | 251 | 223 |
| 2017 | 237 | 210 |
| 2018 | 236 | 237 |
| 2019 | 224 | 218 |
| 2020 | 236 | 175 |
| 2021 | 193 | 106 |
| 2022 | 137 | 102 |
| 2023 | 100 | 59 |
| 2024 | 53 | 33 |
| 2025 | 34 | 35 |
| 2026 | 12 | 16 |
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.
- Fuel agnostic compression ignition engine18 Aug 2026US 12,710,015 B2Climate Energy Investments, LLC
- System and method for adaptive control of ammonia-NOx ratio28 Jul 2026US 12,692,810 B2Caterpillar Inc.
- Work vehicle compression ignition power system having thermally stratified engine combustion chambers21 Jul 2026US 12,687,133 B2Deere & Company
- Sensor system and method14 Jul 2026US 12,680,516 B2Transportation IP Holdings, LLC
- Multi-fuel engine system and method for controlling same8 Oct 2026US 2026/0309102 A1Hd Hyundai Heavy Industries Co., Ltd.
- Exhaust gas recirculation system, engine system, control method of exhaust gas recirculation system, and control program1 Oct 2026US 2026/0298182 A1Yanmar Holdings Co., Ltd.
- Internal combustion engine17 Sep 2026US 2026/0275930 A1
- Method for limiting a suction of oil into an internal combustion engine10 Sep 2026US 2026/0266235 A1Schaeffler Technologies AG & Co. KG
- Internal Combustion Engine Control Device and Control System for Mobile Object27 Aug 2026US 2026/0251104 A1Astemo, Ltd.
Most cited
By later US patents
- Exhaust gas control using a spark plug ionization signal198US 6,980,903 B2Visteon Global Technologies, Inc. · 2005
- 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
- Multivariable control for an engine131US 7,328,577 B2Honeywell International Inc. · 2008