F02B 21/00
Engines characterised by air-storage chambers
F02B21/00 (Engines characterised by air-storage chambers) appears on 253 US grants and 229 published applications in this corpus.
Search patents in F02B- Granted patents
- 253
- Published applications
- 229
- Assignees
- 108
- Inventors
- 438
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 1 |
| 2002 | 0 | 2 |
| 2003 | 4 | 1 |
| 2004 | 1 | 4 |
| 2005 | 2 | 4 |
| 2006 | 6 | 9 |
| 2007 | 3 | 12 |
| 2008 | 9 | 8 |
| 2009 | 3 | 15 |
| 2010 | 6 | 17 |
| 2011 | 11 | 20 |
| 2012 | 4 | 19 |
| 2013 | 18 | 13 |
| 2014 | 16 | 13 |
| 2015 | 13 | 14 |
| 2016 | 6 | 11 |
| 2017 | 8 | 12 |
| 2018 | 13 | 9 |
| 2019 | 12 | 11 |
| 2020 | 7 | 14 |
| 2021 | 11 | 7 |
| 2022 | 10 | 4 |
| 2023 | 9 | 4 |
| 2024 | 2 | 4 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for controlling a gaseous blend in a combustion chamber of a two-stroke cycle of an internal combustion engine3 Mar 2026US 12,565,867 B2
- Variable displacement engine29 Jul 2025US 12,372,035 B2
- Method for operating a supercharged internal combustion engine and device for providing combustion air for a supercharged internal combustion engine10 Sep 2024US 12,085,011 B2Liebherr Machines Bulle SA
- Diesel turbocharger system and method of use5 Mar 2024US 11,920,511 B1
- Compressed air generation system and automotive vehicle comprising such a system21 Nov 2023US 11,821,354 B2Volvo Truck Corporation
- Cycle based on compressed air by an auxiliary compressor for internal combustion engines17 Apr 2025US 2025/0122851 A1
- Split cycle internal combustion engine and methods of operating a split cycle internal combustion engine7 Nov 2024US 2024/0369012 A1
- Method for operating a supercharged internal combustion engine and device for providing combustion air for a supercharged internal combustion engine17 Oct 2024US 2024/0344477 A1Liebherr Machines Bulle SA
- Engine3 Oct 2024US 2024/0328346 A1Isuzu Motors Limited
- Variable displacement engine19 Sep 2024US 2024/0309820 A1
Most cited
By later US patents
- Vehicle operating method and system115US 6,223,846 B12001
- Acceleration aid for an internal combustion engine having an exhaust-driven turbocharger78US 5,064,423 AMAN Nutzfahrzeuge AG · 1991
- Split-cycle air hybrid engine74US 7,353,786 B2Scuderi Group, LLC · 2008
- Internal combustion engine with stratified charge56US 3,976,039 ARegie Nationale des Usines Renault · 1976
- Split-cycle air hybrid engine56US 7,603,970 B2Scuderi Group, LLC · 2009