F02P 3/09
For control of the charging current in the capacitor
Official title: for control of the charging current in the capacitor (F02P15/12 takes precedence)
F02P3/09 (For control of the charging current in the capacitor) appears on 54 US grants and 33 published applications in this corpus.
Search patents in F02P- Granted patents
- 54
- Published applications
- 33
- Assignees
- 38
- Inventors
- 103
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 3 | 4 |
| 2011 | 0 | 0 |
| 2012 | 1 | 4 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 0 | 3 |
| 2016 | 4 | 4 |
| 2017 | 5 | 3 |
| 2018 | 2 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 3 |
| 2022 | 0 | 1 |
| 2023 | 2 | 1 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Engine ignition systems and control methods therefor2 Dec 2025US 12,486,822 B2Hamilton Sundstrand Corporation
- Engine ignition systems15 Jul 2025US 12,359,648 B2Hamilton Sundstrand Corporation
- Igniter and engine ignition device1 Oct 2024US 12,104,565 B2Rohm Co., Ltd.
- Spark plug heat up method via transient control of the spark discharge current4 Jul 2023US 11,692,522 B2Clean Combustion Engine Technology Inc.
- Electronic device to control an ignition coil of an internal combustion engine and electronic ignition system thereof for detecting a preignition in the internal combustion engine27 Jun 2023US 11,686,282 B2Eldor Corporation S.P.A.
- Engine ignition systems and control methods therefor13 Jun 2024US 2024/0191681 A1Hamilton Sundstrand Corporation
- Igniter and engine ignition device28 Mar 2024US 2024/0102438 A1Rohm Co., Ltd.
- Engine ignition systems26 Oct 2023US 2023/0340934 A1Hamilton Sundstrand Corporation
- Electronic device to control an ignition coil of an internal combustion engine and electronic ignition system thereof for detecting a pre-ignition in the internal combustion engine5 May 2022US 2022/0136477 A1Eldor Corporation S.P.A.
- Spark plug heat up method via transient control of the spark discharge current11 Nov 2021US 2021/0348588 A1Clean Combustion Engine Technology Inc.
Most cited
By later US patents
- Rapid pulsed multiple pulse ignition and high efficiency power inverter with controlled output characteristics72US 4,688,538 ACombustion Electromagnetics, Inc. · 1987
- Ignition system for an internal combustion engine38US 4,502,454 ANissan Motor Co., Ltd. · 1985
- Capacitor ignition system for internal-combustion engines26US 4,154,205 ASemikron, Gesellschaft fur Gleichrichterbau · 1979
- Ignition performance monitor and monitoring method for capacitive discharge ignition systems25US 5,208,540 AColtec Industries Inc. · 1993
- Ion current detection apparatus for an internal combustion engine25US 6,075,366 AMitsubishi Denki Kabushiki Kaisha · 2000