F02B 47/00
Methods of operating engines involving adding non-fuel substances or anti-knock agents to
Official title: Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
F02B47/00 (Methods of operating engines involving adding non-fuel substances or anti-knock agents to) appears on 858 US grants and 724 published applications in this corpus.
Search patents in F02B- Granted patents
- 858
- Published applications
- 724
- Assignees
- 354
- Inventors
- 1,490
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 13 | 0 |
| 1978 | 10 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 8 | 0 |
| 1984 | 9 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 17 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 11 | 0 |
| 1996 | 15 | 0 |
| 1997 | 7 | 0 |
| 1998 | 17 | 0 |
| 1999 | 12 | 0 |
| 2000 | 19 | 0 |
| 2001 | 19 | 3 |
| 2002 | 17 | 11 |
| 2003 | 14 | 14 |
| 2004 | 17 | 28 |
| 2005 | 12 | 17 |
| 2006 | 20 | 21 |
| 2007 | 19 | 26 |
| 2008 | 17 | 25 |
| 2009 | 10 | 28 |
| 2010 | 25 | 27 |
| 2011 | 20 | 35 |
| 2012 | 22 | 38 |
| 2013 | 20 | 73 |
| 2014 | 37 | 48 |
| 2015 | 47 | 61 |
| 2016 | 35 | 35 |
| 2017 | 35 | 31 |
| 2018 | 40 | 35 |
| 2019 | 42 | 37 |
| 2020 | 34 | 37 |
| 2021 | 41 | 29 |
| 2022 | 21 | 21 |
| 2023 | 22 | 12 |
| 2024 | 9 | 6 |
| 2025 | 8 | 20 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lubricant compositions for reduced pre-ignition in hydrogen fueled engines29 Sep 2026US 12,747,407 B2Infineum International Limited
- Lubricant compositions containing magnesium detergent for reduced pre-ignition in hydrogen fueled engines15 Sep 2026US 12,735,654 B2Infineum International Limited
- System and machine to improve fuel tank conditions and method of use thereof1 Sep 2026US 12,723,539 B2JD North America Corp.
- Stratified nitrogen enriched air (NEA) strategies and methods to reduce NOx emissions from engines12 May 2026US 12,624,654 B2Saudi Arabian Oil Company
- System and method for injecting condensate in cylinder of a reciprocating engine21 Apr 2026US 12,607,151 B2Innio Jenbacher GmbH & Co OG
- Method and Apparatus for Non-Fossil Fuel Internal Combustion Engine27 Aug 2026US 2026/0251112 A1MayMaan Research, LLC
- Feeding and exhaust system for internal combustion engine, or thermal unit, and respective method of operation13 Aug 2026US 2026/0235064 A1Rhapis S.R.L.
- System and method for managing temperature in an engine of a vehicle13 Aug 2026US 2026/0235089 A1Brp-Rotax GmbH & Co. KG
- Methods and Devices for Reducing NOx Emissions Produced by Diesel Engines2 Jul 2026US 2026/0185497 A1
- Method for diagnosing a water injection system of an internal combustion engine of a hybrid electric vehicle, and hybrid electric vehicle19 Feb 2026US 2026/0049586 A1Dr. Ing. h,c.F. Porsche Aktiengesellschaft
Most cited
By later US patents
- Apparatus and method for reducing emissions in a dual combustion mode diesel engine156US 5,875,743 ASouthwest Research Institute · 1999
- Optimized fuel management system for direct injection ethanol enhancement of gasoline engines129US 7,225,787 B2Massachusetts Institute of Technology · 2007
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Control method for turbocharged diesel engines having exhaust gas recirculation99US 6,035,640 AFord Global Technologies, LLC · 2000
- Apparatus and method for controlling homogeneous charge compression ignition combustion in diesel engines91US 5,832,880 ASouthwest Research Institute · 1998