F02B 51/00
Internal-combustion piston engines: other methods of operating engines involving pretreating of, or
Official title: Other methods of operating engines involving pretreating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines
F02B51/00 (Internal-combustion piston engines: other methods of operating engines involving pretreating of, or) appears on 367 US grants and 260 published applications in this corpus.
Search patents in F02B- Granted patents
- 367
- Published applications
- 260
- Assignees
- 158
- Inventors
- 549
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 9 | 0 |
| 1978 | 9 | 0 |
| 1979 | 6 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 9 | 0 |
| 1984 | 6 | 0 |
| 1985 | 11 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 12 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 1 |
| 2002 | 6 | 8 |
| 2003 | 8 | 9 |
| 2004 | 12 | 12 |
| 2005 | 2 | 12 |
| 2006 | 8 | 14 |
| 2007 | 9 | 4 |
| 2008 | 6 | 11 |
| 2009 | 4 | 9 |
| 2010 | 8 | 16 |
| 2011 | 6 | 10 |
| 2012 | 4 | 13 |
| 2013 | 10 | 17 |
| 2014 | 12 | 16 |
| 2015 | 13 | 14 |
| 2016 | 9 | 6 |
| 2017 | 8 | 10 |
| 2018 | 8 | 5 |
| 2019 | 10 | 25 |
| 2020 | 16 | 12 |
| 2021 | 13 | 9 |
| 2022 | 6 | 10 |
| 2023 | 7 | 6 |
| 2024 | 7 | 6 |
| 2025 | 1 | 3 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power generation and methods regarding same30 Jun 2026US 12,669,080 B2Brilliant Light Power, Inc.
- Marine methanol inert gas blanketing16 Jun 2026US 12,655,817 B2Caterpillar Inc.
- Split cycle engine2 Jun 2026US 12,644,406 B2Fpt Industrial S.P.A.
- Use of ultrasound and acoustics to control crystallisation8 Apr 2025US 12,268,995 B2Lewtas Science & Technologies Ltd
- Prechamber ignited engine and operating methods therefor17 Dec 2024US 12,168,952 B1Caterpillar Inc.
- Power generation and methods regarding same24 Sep 2026US 2026/0286883 A1Brilliant Light Power, Inc.
- Internal combustion engine13 Aug 2026US 2026/0235095 A1
- Fluid Supply Device and Fluid Supply Unit for Increasing Combustion Efficiency30 Oct 2025US 2025/0334082 A1Hao Wei Environmental Technology Co., Ltd.
- Apparatus and methods for plasma assisted combustion1 May 2025US 2025/0137400 A1
- Mixed fuel system24 Apr 2025US 2025/0129737 A1
Most cited
By later US patents
- Combustion engine system177US 4,567,857 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1986
- Optimized fuel management system for direct injection ethanol enhancement of gasoline engines129US 7,225,787 B2Massachusetts Institute of Technology · 2007
- Plasma jet ignition engine and method122US 4,203,393 AFord Motor Company · 1980
- Catalyst placement in combustion cylinder for reduction on NOx and particulate soot119US 6,698,412 B2Catalytica Energy Systems, Inc. · 2004
- Ignition system employing plasma spray90US 4,364,342 AFord Motor Company · 1982