F02D 35/021
Using an ionic current sensor
Official title: {using an ionic current sensor}
F02D35/021 (Using an ionic current sensor) appears on 314 US grants and 256 published applications in this corpus.
Search patents in F02D- Granted patents
- 314
- Published applications
- 256
- Assignees
- 108
- Inventors
- 551
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 2 |
| 2002 | 14 | 8 |
| 2003 | 16 | 12 |
| 2004 | 11 | 20 |
| 2005 | 16 | 10 |
| 2006 | 13 | 14 |
| 2007 | 12 | 15 |
| 2008 | 13 | 20 |
| 2009 | 8 | 18 |
| 2010 | 16 | 15 |
| 2011 | 13 | 22 |
| 2012 | 12 | 10 |
| 2013 | 20 | 7 |
| 2014 | 11 | 10 |
| 2015 | 7 | 18 |
| 2016 | 9 | 10 |
| 2017 | 12 | 7 |
| 2018 | 13 | 11 |
| 2019 | 11 | 9 |
| 2020 | 8 | 4 |
| 2021 | 7 | 4 |
| 2022 | 6 | 5 |
| 2023 | 3 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of operating a hydrogen internal combustion engine19 May 2026US 12,631,151 B2Phinia Delphi Luxembourg Sarl
- In situ valuation of auto-ignition quality of fuel in compression ignition engines26 Nov 2024US 12,152,544 B2Wayne State University
- Early warning system for stochastic preignition17 Sep 2024US 12,092,052 B2GM Global Technology Operations LLC
- Combustion apparatus that combusts fuel12 Sep 2023US 11,754,010 B2Save the Planet Co., Ltd.
- System and method for independently controlling firing of individual internal combustion engine cylinders at least partly with engine position sensor20 Jun 2023US 11,680,550 B2
- Method for controlling the injection of coolant into an internal combustion engine of a motor vehicle and related vehicle and computer program product25 Jun 2026US 2026/0177021 A1Ferrari S.P. A.
- Method of operating a hydrogen internal combustion engine6 Nov 2025US 2025/0341191 A1Phinia Delphi Luxembourg Sarl
- Engine combustion control system26 Jun 2025US 2025/0207552 A1Mazda Motor Corporation
- Early Warning System for Stochastic Preignition11 Jul 2024US 2024/0229733 A1GM Global Technology Operations LLC
- System and Method for Independently Controlling Firing of Individual Internal Combustion Engine Cylinders at least partly with Engine Position Sensor30 Mar 2023US 2023/0099571 A1
Most cited
By later US patents
- Exhaust gas control using a spark plug ionization signal198US 6,980,903 B2Visteon Global Technologies, Inc. · 2005
- Apparatus and method for controlling the air/fuel ratio of an internal combustion engine69US 5,036,669 ACaterpillar Inc. · 1991
- Method and apparatus for detecting ionization signal in diesel and dual mode engines with plasma discharge system68US 6,994,073 B2Woodward Governor Company · 2006
- Control system for self-ignition type gasoline engine67US 6,354,264 B1Nissan Motor Co., Ltd. · 2002
- Apparatus and method for controlling air/fuel ratio using ionization measurements66US 6,029,627 AAdrenaline Research, Inc. · 2000