F02D 21/08
The other gas being the exhaust gas of engine
Official title: the other gas being the exhaust gas of engine
F02D21/08 (The other gas being the exhaust gas of engine) appears on 573 US grants and 378 published applications in this corpus.
Search patents in F02D- Granted patents
- 573
- Published applications
- 378
- Assignees
- 179
- Inventors
- 1,247
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 12 | 0 |
| 1978 | 17 | 0 |
| 1979 | 13 | 0 |
| 1980 | 23 | 0 |
| 1981 | 23 | 0 |
| 1982 | 17 | 0 |
| 1983 | 8 | 0 |
| 1984 | 12 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 13 | 0 |
| 1999 | 5 | 0 |
| 2000 | 25 | 0 |
| 2001 | 23 | 7 |
| 2002 | 16 | 10 |
| 2003 | 12 | 10 |
| 2004 | 10 | 10 |
| 2005 | 10 | 9 |
| 2006 | 4 | 2 |
| 2007 | 6 | 4 |
| 2008 | 5 | 13 |
| 2009 | 2 | 6 |
| 2010 | 5 | 9 |
| 2011 | 6 | 15 |
| 2012 | 5 | 23 |
| 2013 | 6 | 34 |
| 2014 | 18 | 35 |
| 2015 | 31 | 44 |
| 2016 | 36 | 34 |
| 2017 | 38 | 35 |
| 2018 | 30 | 19 |
| 2019 | 24 | 20 |
| 2020 | 30 | 19 |
| 2021 | 15 | 3 |
| 2022 | 7 | 5 |
| 2023 | 6 | 5 |
| 2024 | 7 | 5 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Exhaust gas recirculation and aftertreatment control30 Dec 2025US 12,510,036 B2Perkins Engines Company Limited
- Piston for compression-ignition engine having antebowl and engine operating strategy utilizing same8 Jul 2025US 12,352,200 B2Caterpillar Inc.
- Engine4 Feb 2025US 12,215,641 B2Yanmar Power Technology Co., Ltd.
- System and method for diagnosing an exhaust gas sensor17 Dec 2024US 12,169,155 B2Ford Global Technologies, LLC
- System and method for management of multiple exhaust gas recirculation coolers19 Nov 2024US 12,146,457 B2Innio Waukesha Gas Engines Inc.
- Control system for internal combustion engine, internal combustion engine configured to control combusion, and method of control thereof16 Oct 2025US 2025/0320839 A1Cummins Power Generation Inc.
- Engine8 May 2025US 2025/0146446 A1Yanmar Power Technology Co., Ltd.
- Thermal management of an internal combustion engine31 Oct 2024US 2024/0360799 A1Perkins Engines Company Limited
- Global and individual cylinder control in engine system10 Oct 2024US 2024/0337223 A1Caterpillar Inc.
- Engine29 Aug 2024US 2024/0287944 A1Yanmar Power Technology Co., Ltd.
Most cited
By later US patents
- Dual converter engine exhaust system for reducing hydrocarbon emissions137US 5,125,231 ACorning Incorporated · 1992
- Sequential turbocharger system for an internal combustion engine135US 5,142,866 AToyota Jidosha Kabushiki Kaisha · 1992
- Internal combustion engine with an exhaust gas recirculation system118US 5,740,786 AMercedes-Benz AG · 1998
- Method of controlling reciprocating four-stroke internal combustion engines107US 4,700,684 AFEV Forschungsgesellschaft fur Energietechnik und Verbrennungsmotoren mbH · 1987
- Exhaust gas purification device for an internal combustion engine105US 5,732,554 AToyota Jidosha Kabushiki Kaisha · 1998