F02D 19/0621
Purging of the fuel system
Official title: {Purging of the fuel system}
F02D19/0621 (Purging of the fuel system) appears on 62 US grants and 68 published applications in this corpus.
Search patents in F02D- Granted patents
- 62
- Published applications
- 68
- Assignees
- 39
- Inventors
- 142
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 3 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 6 | 6 |
| 2011 | 3 | 4 |
| 2012 | 2 | 3 |
| 2013 | 3 | 4 |
| 2014 | 4 | 7 |
| 2015 | 3 | 7 |
| 2016 | 7 | 5 |
| 2017 | 5 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 2 |
| 2020 | 4 | 2 |
| 2021 | 1 | 3 |
| 2022 | 3 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 5 |
| 2025 | 3 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems for a multi-fuel capable engine10 Feb 2026US 12,546,266 B2Transportation IP Holdings, LLC
- Systems and methods for at-cylinder fuel switching27 Jan 2026US 12,535,041 B2Caterpillar Inc.
- Gas supply system for a gas engine or dual-fuel engine and method for operating the same1 Jul 2025US 12,345,213 B2MAN Energy Solutions SE
- Method and apparatus for using biofuels in engines having emission control systems20 May 2025US 12,305,583 B2Optimus Technologies, Inc.
- Systems and methods for purging fuel in a combustion engine4 Feb 2025US 12,215,640 B2Caterpillar Inc.
- Method and Apparatus For Using Biofuels in Engines Having Emission Control Systems7 Aug 2025US 2025/0250945 A1Optimus Technologies, Inc.
- Apparatus and Method for Nitrogen Generation for Methanol Powered Maritime Vehicle19 Jun 2025US 2025/0197218 A1Air Products and Chemicals, Inc.
- Systems and methods for at-cylinder fuel switching5 Jun 2025US 2025/0179970 A1Caterpillar Inc.
- Systems and methods for purging fuel in a combustion engine28 Nov 2024US 2024/0392730 A1Caterpillar Inc.
- Method and arrangement for handling vent gas mixture1 Aug 2024US 2024/0255141 A1Alfa Laval Corporate AB
Most cited
By later US patents
- Dual fuel system for an internal combustion engine167US 9,212,643 B2Delia Ltd. · 2015
- Bi-fuel liquid injection system for an internal combustion engine60US 6,035,837 ASiemens Automotive Corporation · 2000
- Fuel control system for a dual-fueled power unit47US 4,278,064 ADeere & Company · 1981
- Method for fuel vapor canister purging46US 7,775,195 B2Ford Global Technologies, LLC · 2010
- Fuel injector system36US 4,782,794 AGeneral Electric Company · 1988