F02D 19/081
Adjusting the fuel composition or mixing ratio
Official title: {Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other}
F02D19/081 (Adjusting the fuel composition or mixing ratio) appears on 725 US grants and 815 published applications in this corpus.
Search patents in F02D- Granted patents
- 725
- Published applications
- 815
- Assignees
- 265
- Inventors
- 1,188
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 1 |
| 2002 | 7 | 14 |
| 2003 | 10 | 10 |
| 2004 | 10 | 14 |
| 2005 | 10 | 15 |
| 2006 | 13 | 17 |
| 2007 | 21 | 38 |
| 2008 | 26 | 32 |
| 2009 | 16 | 46 |
| 2010 | 38 | 49 |
| 2011 | 30 | 63 |
| 2012 | 36 | 53 |
| 2013 | 37 | 51 |
| 2014 | 34 | 46 |
| 2015 | 45 | 50 |
| 2016 | 36 | 34 |
| 2017 | 33 | 39 |
| 2018 | 30 | 20 |
| 2019 | 28 | 39 |
| 2020 | 29 | 21 |
| 2021 | 28 | 27 |
| 2022 | 17 | 17 |
| 2023 | 37 | 37 |
| 2024 | 31 | 27 |
| 2025 | 38 | 34 |
| 2026 | 8 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Fuel system for a spark ignition engine21 Apr 2026US 12,607,150 B2Fpt Industrial S.P.A.
- Fuel supply system for supplying a fuel emulsion to a fuel injection system of an engine14 Apr 2026US 12,601,305 B2Caterpillar Motoren GmbH & Co. KG
- Systems for a multi-fuel capable engine10 Feb 2026US 12,546,266 B2Transportation IP Holdings, LLC
- Methodology to enable efficient flex fuel operation with natural gas, hydrogen, and their blends10 Feb 2026US 12,546,268 B1Saudi Arabian Oil Company
- Multi-fuel engine system and method for controlling same8 Oct 2026US 2026/0309102 A1Hd Hyundai Heavy Industries Co., Ltd.
- Controller and control method1 Oct 2026US 2026/0298166 A1Toyota Jidosha Kabushiki Kaisha
- Control device and method for internal combustion engine17 Sep 2026US 2026/0275923 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Improvements relating to internal combustion engines3 Sep 2026US 2026/0258758 A1Commonwealth Scientific and Industrial Research Organisation
- Method and Apparatus for Non-Fossil Fuel Internal Combustion Engine27 Aug 2026US 2026/0251112 A1MayMaan Research, LLC
Most cited
By later US patents
- System comprising duel-fuel and after treatment for heavy-heavy duty diesel (HHDD) engines180US 10,287,943 B1Clean Power Technologies, LLC · 2019
- Reformed natural gas for powering an internal combustion engine177US 6,508,209 B12003
- Dual fuel supply system for a direct-injection system of a diesel engine with on-board mixing169US 8,973,560 B2Dgc Industries Pty Ltd · 2015
- Dual fuel system for an internal combustion engine167US 9,212,643 B2Delia Ltd. · 2015
- Multi-source gaseous fuel blending manifold166US 9,964,052 B2BM Group LLC · 2018