F02D 19/105
Operating in a special mode
Official title: {operating in a special mode, e.g. in a liquid fuel only mode for starting}
F02D19/105 (Operating in a special mode) appears on 175 US grants and 181 published applications in this corpus.
Search patents in F02D- Granted patents
- 175
- Published applications
- 181
- Assignees
- 83
- Inventors
- 339
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 6 |
| 2003 | 4 | 2 |
| 2004 | 5 | 4 |
| 2005 | 2 | 2 |
| 2006 | 1 | 0 |
| 2007 | 2 | 5 |
| 2008 | 2 | 0 |
| 2009 | 3 | 4 |
| 2010 | 2 | 2 |
| 2011 | 1 | 3 |
| 2012 | 1 | 8 |
| 2013 | 3 | 6 |
| 2014 | 5 | 15 |
| 2015 | 5 | 20 |
| 2016 | 12 | 14 |
| 2017 | 8 | 11 |
| 2018 | 10 | 14 |
| 2019 | 13 | 17 |
| 2020 | 13 | 8 |
| 2021 | 17 | 13 |
| 2022 | 8 | 7 |
| 2023 | 10 | 6 |
| 2024 | 4 | 3 |
| 2025 | 4 | 7 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel system having dual fuel quill connector and quill connector installation method26 May 2026US 12,637,994 B2Caterpillar Inc.
- 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.
- Fuel management for dynamic gas blending disablement22 Jul 2025US 12,366,213 B1Caterpillar Inc.
- Hydrogen-diesel direct injection dual-fuel system for internal combustion engines24 Jun 2025US 12,338,777 B2NewSouth Innovations Pty Limited
- Dual fuel injector, engine, and control method for a dual fuel injector4 Jun 2026US 2026/0153058 A1Weichai Power Co., Ltd.
- Method of operating a hybrid ammonia-diesel compression ignition propulsion system and/or power generation system and controlling the power output and emissions thereof14 May 2026US 2026/0132750 A1Analytical Engineering, Inc.
- Fuel system having dual fuel quill connector and quill connector installation method26 Mar 2026US 2026/0085651 A1Caterpillar Inc.
- Engine system5 Feb 2026US 2026/0036094 A1Yanmar Holdings Co., Ltd.
- Gaseous and dual fuel intake system for diesel and gasoline engines2 Oct 2025US 2025/0305462 A1
Most cited
By later US patents
- Bi-fuel control system and retrofit assembly for diesel engines231US 6,543,395 B2Gas Technologies LLC · 2003
- Method and apparatus for operating a dual fuel internal combustion engine226US 7,627,416 B2Westport Power Inc. · 2009
- Methods and apparatus for operation of multiple fuel engines199US 7,222,015 B2Engine Control Technology, LLC · 2007
- Multiple operating mode engine and method of operation134US 6,561,157 B2Cummins Inc. · 2003
- Dual fuel electronic control system91US 5,224,457 ADeere & Company · 1993