F02B 9/04
Methods of operating
F02B9/04 (Methods of operating) appears on 23 US grants and 27 published applications in this corpus.
Search patents in F02B- Granted patents
- 23
- Published applications
- 27
- Assignees
- 16
- Inventors
- 57
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 2 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 4 |
| 2016 | 1 | 3 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 3 |
| 2020 | 2 | 1 |
| 2021 | 4 | 4 |
| 2022 | 3 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for combusting unconventional fuel chemistries in a diesel engine architecture7 Jul 2026US 12,674,409 B2Climate Energy Investments, LLC
- Systems and methods for coordinating an air blend valve with an intake air heater14 Oct 2025US 12,442,352 B1Saudi Arabian Oil Company
- Compression ignition engine with igniter and pilot injector28 Jan 2025US 12,209,532 B2Wisconsin Alumni Research Foundation
- Systems and methods for combusting unconventional fuel chemistries in a diesel engine architecture9 Apr 2024US 11,952,936 B1ClearFlame Engines, Inc.
- Machine learning for misfire detection in a dynamic firing level modulation controlled engine of a vehicle10 May 2022US 11,326,534 B2Tula Technology, Inc.
- Systems and methods for combusting unconventional fuel chemistries in a diesel engine architecture23 Jan 2025US 2025/0027440 A1ClearFlame Engines, Inc.
- Compression Ignition Engine with Igniter and Pilot Injector5 Sep 2024US 2024/0295188 A1Wisconsin Alumni Research Foundation
- Cold Start for High-Octane Fuels in a Diesel Engine Architecture27 Apr 2023US 2023/0129315 A1ClearFlame Engines, Inc.
- An improved ammonia based fuel for engines1 Sep 2022US 2022/0275299 A1Commonwealth Scientific and Industrial Research Organisation
- Machine learning for misfire detection in a dynamic firing level modulation controlled engine of a vehicle13 Jan 2022US 2022/0010744 A1Tula Technology, Inc.
Most cited
By later US patents
- Thermal ignition combustion system37US 4,738,227 AAdiabatics, Inc. · 1988
- Flex fuel field generator28US 9,175,601 B2INI Power Systems, Inc. · 2015
- Compression ignition initiation device and internal combustion engine using same13US 7,398,743 B2Caterpillar Inc. · 2008
- Control system of compression-ignition engine8US 10,697,391 B2Mazda Motor Corporation · 2020
- Hybrid combustion in a diesel engine8US 7,461,627 B2International Engine Intellectual Property Company, LLC · 2008