F02B 69/02
Internal-combustion engines convertible into other combustion-engine type, not provided for in f02b11/00
Official title: for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
F02B69/02 (Internal-combustion engines convertible into other combustion-engine type, not provided for in f02b11/00) appears on 104 US grants and 84 published applications in this corpus.
Search patents in F02B- Granted patents
- 104
- Published applications
- 84
- Assignees
- 68
- Inventors
- 226
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 3 |
| 2003 | 3 | 3 |
| 2004 | 1 | 3 |
| 2005 | 2 | 4 |
| 2006 | 0 | 3 |
| 2007 | 2 | 3 |
| 2008 | 3 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 3 |
| 2011 | 2 | 1 |
| 2012 | 2 | 2 |
| 2013 | 1 | 6 |
| 2014 | 2 | 2 |
| 2015 | 5 | 6 |
| 2016 | 4 | 5 |
| 2017 | 1 | 1 |
| 2018 | 8 | 5 |
| 2019 | 4 | 5 |
| 2020 | 4 | 4 |
| 2021 | 3 | 2 |
| 2022 | 1 | 3 |
| 2023 | 6 | 7 |
| 2024 | 4 | 4 |
| 2025 | 3 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Energy management for power system17 Mar 2026US 12,580,212 B2Transportation IP Holdings, LLC
- Dual fuel system with electric battery for power generation15 Jul 2025US 12,359,630 B2RV Mobile Power, LLC
- Compression ignition engine with igniter and pilot injector28 Jan 2025US 12,209,532 B2Wisconsin Alumni Research Foundation
- Energy management for multi-input propulsion14 Jan 2025US 12,194,889 B2Transportation IP Holdings, LLC
- Fuel injection system and method22 Oct 2024US 12,123,383 B2Volvo Construction Equipment AB
- Dual fuel system with electric battery for power generation16 Oct 2025US 2025/0320837 A1RV Mobile Power, LLC
- Dual fuel engine system22 May 2025US 2025/0163847 A1Shell USA, Inc.
- Energy management for multi-input propulsion8 May 2025US 2025/0145056 A1Transportation IP Holdings, LLC
- Compression Ignition Engine with Igniter and Pilot Injector5 Sep 2024US 2024/0295188 A1Wisconsin Alumni Research Foundation
- Energy management for power system14 Mar 2024US 2024/0088418 A1Transportation IP Holdings, LLC
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 dual fuel injection into an internal combustion engine93US 6,202,601 B1Westport Research Inc. · 2001
- Internal combustion engines76US 5,531,199 AUnited Fuels Limited · 1996
- Method and operation of an engine72US 7,431,024 B2Polaris Industries Inc. · 2008
- System and method for a dual fuel, direct injection combustion engine59US 5,890,459 ASouthwest Research Institute · 1999