F02D 41/20
Output circuits
Official title: Output circuits, e.g. for controlling currents in command coils
F02D41/20 (Output circuits) appears on 2,321 US grants and 2,016 published applications in this corpus.
Search patents in F02D- Granted patents
- 2,321
- Published applications
- 2,016
- Assignees
- 446
- Inventors
- 3,899
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 10 | 0 |
| 1980 | 10 | 0 |
| 1981 | 9 | 0 |
| 1982 | 16 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 20 | 0 |
| 1986 | 18 | 0 |
| 1987 | 21 | 0 |
| 1988 | 25 | 0 |
| 1989 | 15 | 0 |
| 1990 | 15 | 0 |
| 1991 | 12 | 0 |
| 1992 | 17 | 0 |
| 1993 | 11 | 0 |
| 1994 | 15 | 0 |
| 1995 | 16 | 0 |
| 1996 | 11 | 0 |
| 1997 | 14 | 0 |
| 1998 | 27 | 0 |
| 1999 | 43 | 0 |
| 2000 | 44 | 0 |
| 2001 | 52 | 26 |
| 2002 | 60 | 72 |
| 2003 | 85 | 82 |
| 2004 | 95 | 95 |
| 2005 | 66 | 93 |
| 2006 | 89 | 72 |
| 2007 | 62 | 71 |
| 2008 | 65 | 98 |
| 2009 | 51 | 107 |
| 2010 | 73 | 95 |
| 2011 | 62 | 93 |
| 2012 | 65 | 92 |
| 2013 | 71 | 64 |
| 2014 | 68 | 92 |
| 2015 | 71 | 127 |
| 2016 | 90 | 108 |
| 2017 | 110 | 107 |
| 2018 | 124 | 121 |
| 2019 | 115 | 93 |
| 2020 | 122 | 75 |
| 2021 | 100 | 90 |
| 2022 | 110 | 59 |
| 2023 | 44 | 24 |
| 2024 | 37 | 26 |
| 2025 | 26 | 17 |
| 2026 | 10 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02D 2041/202Characterised by the control of the circuitIndexing code1,573
- F02D 2041/2003Using means for creating a boost voltage, i.e. generation or use ofIndexing code433
- F02D 41/2096For controlling piezoelectric injectors397
- F02D 2041/2068Characterised by the circuit design or special circuit elementsIndexing code318
- F02D 2041/2017Using means for creating a boost current or using reference switchingIndexing code183
- F02D 2041/2086With means for detecting circuit failuresIndexing code134
Recent patents
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- Method of controlling fuel injection21 Jul 2026US 12,687,134 B2Phinia Delphi Luxembourg Sarl
- Asymmetric fuel injection window and fuel metering window17 Mar 2026US 12,577,918 B2Caterpillar Inc.
- Method of fuel injector management based on cylinder knock detection and vehicle including the same17 Mar 2026US 12,577,921 B1GM Global Technology Operations LLC
- Oxygen sensor heater control for hybrid vehicle3 Mar 2026US 12,565,864 B2Fca US LLC
- Control system for multi-fuel generator set and control method thereof, and generator set17 Sep 2026US 2026/0275924 A1Chongqing Rato Technology Co., Ltd.
- Internal Combustion Engine Control Device and Control System for Mobile Object27 Aug 2026US 2026/0251104 A1Astemo, Ltd.
- System and related method for fuel injection systems13 Aug 2026US 2026/0235096 A1Caterpillar Inc.
- Fueling system controls including detection of valve fully open condition16 Jul 2026US 2026/0201846 A1Cummins Inc.
- Novel system for enhancing thermomechnical efficiency and reducing emissions and noise levels in ic engines9 Jul 2026US 2026/0194025 A1
Most cited
By later US patents
- Method for operating a piezoelectric element327US 8,089,197 B2Epcos AG · 2012
- Internal combustion engine control for improved fuel efficiency214US 8,099,224 B2Tula Technology, Inc. · 2012
- Internal combustion engine control for improved fuel efficiency109US 8,131,445 B2Tula Technology, Inc. · 2012
- Method of operating an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine102US 4,823,825 A1989
- System and methods for electronic control of an accumulator fuel system101US 5,678,521 ACummins Engine Company, Inc. · 1997