F02B 43/02
Engines characterised by means for increasing operating efficiency
F02B43/02 (Engines characterised by means for increasing operating efficiency) appears on 122 US grants and 141 published applications in this corpus.
Search patents in F02B- Granted patents
- 122
- Published applications
- 141
- Assignees
- 96
- Inventors
- 285
- Latest grant
- 10 Feb 2026
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 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 2 |
| 2007 | 3 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 2 |
| 2010 | 1 | 4 |
| 2011 | 2 | 4 |
| 2012 | 1 | 4 |
| 2013 | 3 | 9 |
| 2014 | 5 | 20 |
| 2015 | 11 | 18 |
| 2016 | 13 | 16 |
| 2017 | 11 | 13 |
| 2018 | 14 | 11 |
| 2019 | 8 | 9 |
| 2020 | 12 | 5 |
| 2021 | 6 | 4 |
| 2022 | 3 | 4 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 0 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrogen engine10 Feb 2026US 12,546,248 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- High-pressure gas compression-ignition engine27 Aug 2024US 12,071,917 B2
- Fuel supply device for supplying a fuel and internal combustion engine11 Jun 2024US 12,006,862 B2Liebherr Machines Bulle SA
- Hydrogen cell28 Nov 2023US 11,828,250 B2E.HY. Energy Hydrogen Solution S.p.A.
- Thermal cracker for combustible and flammable liquids for engines7 Nov 2023US 11,808,237 B2
- Piston and Internal Combustion Engine3 Sep 2026US 2026/0258767 A1KS Kolbenschmidt GmbH
- Piston for an internal combustion engine11 Dec 2025US 2025/0376962 A1Volvo Truck Corporation
- Valved-piston and actuator with recycled combustion4 Dec 2025US 2025/0369373 A1
- Hydrogen engine14 Aug 2025US 2025/0257684 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Gaseous injector preparation method for cold engine start15 May 2025US 2025/0154922 A1Cummins Inc.
Most cited
By later US patents
- Internal combustion engines76US 5,531,199 AUnited Fuels Limited · 1996
- Hydrogen enriched natural gas as a motor fuel with variable air fuel ratio and fuel mixture ratio control73US 5,666,923 AUniversity of Central Florida · 1997
- Hydrogen enriched natural gas as a clean motor fuel68US 5,660,602 AUniversity of Central Florida · 1997
- Dual fuel injection structure47US 5,136,986 AEnergy Conversions, Inc. · 1992
- Alternative fuel system for powered industrial vehicle45US 5,330,031 AClark Material Handling Company · 1994