F02B 21/02
Chamber shapes or constructions
F02B21/02 (Chamber shapes or constructions) appears on 27 US grants and 25 published applications in this corpus.
Search patents in F02B- Granted patents
- 27
- Published applications
- 25
- Assignees
- 15
- Inventors
- 49
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 5 |
| 2012 | 0 | 4 |
| 2013 | 2 | 2 |
| 2014 | 4 | 1 |
| 2015 | 2 | 3 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 3 |
| 2020 | 1 | 3 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Variable displacement engine29 Jul 2025US 12,372,035 B2
- Internal combustion engine, combustion systems, and related methods and control methods and systems3 Oct 2023US 11,773,765 B2
- Diesel engine with turbulent jet ignition30 Nov 2021US 11,187,142 B2Board of Trustees of Michigan State University
- Turbocharger system, compressor system that forms part thereof, and method of controlling air flow to an engine9 Feb 2021US 10,914,230 B2Litens Automotive Partnership
- Hybrid vehicle30 Jun 2020US 10,697,418 B2Toyota Jidosha Kabushiki Kaisha
- Variable displacement engine19 Sep 2024US 2024/0309820 A1
- Diesel engine with turbulent jet ignition25 Jun 2020US 2020/0200068 A1Board of Trustees of Michigan State University
- Internal combustion engine, combustion systems, and related methods and control methods and systems28 May 2020US 2020/0163617 A1
- Turbocharger system, compressor system that forms part thereof, and method of controlling air flow to an engine6 Feb 2020US 2020/0040808 A1Litens Automotive Partnership
- Air injection control into a combustion chamber28 Nov 2019US 2019/0360386 A1
Most cited
By later US patents
- Internal combustion engine with stratified charge56US 3,976,039 ARegie Nationale des Usines Renault · 1976
- Internal combustion piston engine using air chamber in piston driven in resonance with combustion wave frequency34US 4,592,318 ASonex Research, Inc. · 1986
- Piston and process for achieving controlled ignition and combustion of hydrocarbon fuels in internal combustion engines by generation and management of fuel radical species24US 4,898,135 ASonex Research, Inc. · 1990
- Engine valve assembly having holding tank with return valve and discharge valve in the valve assembly18US 7,322,321 B22008
- Charge conditioning system for enabling cold starting and running of spark-ignited, diesel fueled piston engines17US 5,855,192 ASonex Research, Inc. · 1999