F02D 19/029
Determining density, viscosity, concentration or composition
Official title: {Determining density, viscosity, concentration or composition}
F02D19/029 (Determining density, viscosity, concentration or composition) appears on 106 US grants and 114 published applications in this corpus.
Search patents in F02D- Granted patents
- 106
- Published applications
- 114
- Assignees
- 68
- Inventors
- 253
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 5 |
| 2006 | 4 | 3 |
| 2007 | 2 | 3 |
| 2008 | 5 | 5 |
| 2009 | 2 | 2 |
| 2010 | 1 | 3 |
| 2011 | 7 | 5 |
| 2012 | 2 | 3 |
| 2013 | 4 | 2 |
| 2014 | 2 | 5 |
| 2015 | 2 | 5 |
| 2016 | 6 | 4 |
| 2017 | 7 | 8 |
| 2018 | 3 | 12 |
| 2019 | 9 | 5 |
| 2020 | 6 | 8 |
| 2021 | 6 | 3 |
| 2022 | 5 | 3 |
| 2023 | 2 | 3 |
| 2024 | 6 | 8 |
| 2025 | 6 | 6 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine system and method for determining fuel characteristics12 May 2026US 12,624,668 B2Caterpillar Inc.
- Fuel system for a spark ignition engine21 Apr 2026US 12,607,150 B2Fpt Industrial S.P.A.
- Methodology to enable efficient flex fuel operation with natural gas, hydrogen, and their blends10 Feb 2026US 12,546,268 B1Saudi Arabian Oil Company
- Engine system21 Oct 2025US 12,448,927 B2Kabushiki Kaisha Toyota Jidoshokki
- Engine control device, and vehicle21 Oct 2025US 12,448,932 B2Isuzu Motors Limited
- Fuel supply system, and vehicle1 Oct 2026US 2026/0298160 A1Isuzu Motors Limited
- System and control method13 Aug 2026US 2026/0235056 A1Komatsu Ltd.
- System and control method6 Aug 2026US 2026/0226853 A1Komatsu Ltd.
- Systems and methods for monitoring and controlling crankcase combustible gas concentrations18 Jun 2026US 2026/0168450 A1Caterpillar Inc.
- Hydrogen fueling systems and methods16 Apr 2026US 2026/0103069 A1Cummins Inc.
Most cited
By later US patents
- Fuel gas admixing process and device78US 5,992,388 APatentanwalt Hans Rudolf Gachnang · 1999
- Method and system for improved fuel system performance of a gaseous fuel engine65US 5,367,999 AMesa Environmental Ventures Limited Partnership · 1994
- Hydrogen gas fuel and management system for an internal combustion engine utilizing hydrogen gas fuel48US 5,293,857 A1994
- Turbocharged natural gas engine control system40US 5,622,053 ACooper Cameron Corporation · 1997
- Closed loop control system for hydrogen fuelled engine33US 4,141,326 AThe Bendix Corporation · 1979