F02B 1/12
Engines characterised by fuel-air mixture compression: with compression ignition
Official title: with compression ignition (with fuel-air charge ignited by compression ignition of an additional fuel F02B7/00)
F02B1/12 (Engines characterised by fuel-air mixture compression: with compression ignition) appears on 847 US grants and 840 published applications in this corpus.
Search patents in F02B- Granted patents
- 847
- Published applications
- 840
- Assignees
- 224
- Inventors
- 1,346
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 24 | 12 |
| 2002 | 30 | 41 |
| 2003 | 66 | 76 |
| 2004 | 55 | 97 |
| 2005 | 73 | 57 |
| 2006 | 68 | 66 |
| 2007 | 50 | 58 |
| 2008 | 56 | 60 |
| 2009 | 21 | 55 |
| 2010 | 55 | 32 |
| 2011 | 34 | 30 |
| 2012 | 20 | 24 |
| 2013 | 24 | 24 |
| 2014 | 22 | 25 |
| 2015 | 20 | 29 |
| 2016 | 22 | 23 |
| 2017 | 18 | 14 |
| 2018 | 15 | 18 |
| 2019 | 20 | 35 |
| 2020 | 36 | 24 |
| 2021 | 28 | 20 |
| 2022 | 22 | 7 |
| 2023 | 5 | 7 |
| 2024 | 7 | 2 |
| 2025 | 4 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fuel agnostic compression ignition engine18 Aug 2026US 12,710,015 B2Climate Energy Investments, LLC
- Diesel engine6 Jan 2026US 12,516,645 B2Kubota Corporation
- Systems and methods of cylinder deactivation in high-temperature mixing-controlled engines16 Dec 2025US 12,497,926 B2Climate Energy Investments, LLC
- High-efficiency linear generator23 Sep 2025US 12,421,890 B2Mainspring Energy, Inc.
- Two stroke engine16 Sep 2025US 12,416,270 B1
- Compression ignition engine and system utilizing ammonia as a fuel source24 Sep 2026US 2026/0286881 A1Analytical Engineering, Inc.
- Exhaust rebreathe enabled mixing controlled compression ignition15 Jan 2026US 2026/0015983 A1Marquette University
- Fuel agnostic compression ignition engine30 Jan 2025US 2025/0035062 A1ClearFlame Engines, Inc.
- Diesel engine16 Jan 2025US 2025/0020088 A1Kubota Corporation
- High-efficiency linear generator29 Aug 2024US 2024/0287930 A1Mainspring Energy, Inc.
Most cited
By later US patents
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- Differential torque operation for internal combustion engine167US 7,503,312 B2Ford Global Technologies, LLC · 2009
- Method and apparatus to increase combustion efficiency and to reduce exhaust gas pollutants from combustion of a fuel158US 6,851,413 B1Ronnell Company, Inc. · 2005
- Apparatus and method for reducing emissions in a dual combustion mode diesel engine156US 5,875,743 ASouthwest Research Institute · 1999
- Premixed charge compression ignition engine with optimal combustion control152US 6,230,683 B1Cummins Engine Company, Inc. · 2001