F02P 9/002
Control of spark intensity, intensifying, lengthening, suppression
Official title: {Control of spark intensity, intensifying, lengthening, suppression (by means of current control in the storage devices F02P3/05, F02P3/09, during starting F02P15/12)}
F02P9/002 (Control of spark intensity, intensifying, lengthening, suppression) appears on 1,079 US grants and 731 published applications in this corpus.
Search patents in F02P- Granted patents
- 1,079
- Published applications
- 731
- Assignees
- 319
- Inventors
- 1,608
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 15 | 0 |
| 1978 | 10 | 0 |
| 1979 | 14 | 0 |
| 1980 | 11 | 0 |
| 1981 | 20 | 0 |
| 1982 | 20 | 0 |
| 1983 | 24 | 0 |
| 1984 | 21 | 0 |
| 1985 | 18 | 0 |
| 1986 | 18 | 0 |
| 1987 | 21 | 0 |
| 1988 | 11 | 0 |
| 1989 | 10 | 0 |
| 1990 | 21 | 0 |
| 1991 | 23 | 0 |
| 1992 | 15 | 0 |
| 1993 | 22 | 0 |
| 1994 | 8 | 0 |
| 1995 | 20 | 0 |
| 1996 | 14 | 0 |
| 1997 | 10 | 0 |
| 1998 | 12 | 0 |
| 1999 | 5 | 0 |
| 2000 | 18 | 0 |
| 2001 | 10 | 1 |
| 2002 | 16 | 21 |
| 2003 | 18 | 15 |
| 2004 | 17 | 14 |
| 2005 | 18 | 15 |
| 2006 | 11 | 11 |
| 2007 | 11 | 13 |
| 2008 | 13 | 22 |
| 2009 | 5 | 26 |
| 2010 | 15 | 31 |
| 2011 | 17 | 22 |
| 2012 | 19 | 25 |
| 2013 | 24 | 30 |
| 2014 | 34 | 57 |
| 2015 | 26 | 47 |
| 2016 | 52 | 78 |
| 2017 | 75 | 73 |
| 2018 | 74 | 63 |
| 2019 | 49 | 48 |
| 2020 | 57 | 30 |
| 2021 | 44 | 34 |
| 2022 | 29 | 23 |
| 2023 | 19 | 7 |
| 2024 | 16 | 13 |
| 2025 | 12 | 6 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for engine start15 Sep 2026US 12,736,015 B2Polaris Industries Inc.
- Ignition system and control method15 Sep 2026US 12,736,024 B2Clean Combustion Engine Technology Inc.
- Pre-chamber ignition system and procedure for an internal combustion engine3 Mar 2026US 12,565,850 B2Marelli Europe S.P.A.
- Systems and methods for engine start16 Sep 2025US 12,416,272 B2Polaris Industries Inc.
- Ignition device16 Sep 2025US 12,416,281 B2Diamond&Zebra Electric Mfg. Co., Ltd.
- Method of restricting rotational speed of an engine of a handheld power tool, control arrangement, and handheld power tool16 Jul 2026US 2026/0201845 A1Husqvarna AB
- Systems and methods for engine start14 May 2026US 2026/0132753 A1Polaris Industries Inc.
- Magnetically rotating spark plug with slanted coaxial electrode30 Apr 2026US 2026/0117734 A1Hyundai Motor Company
- Traveling spark igniter5 Mar 2026US 2026/0066621 A1Champion Aerospace Inc.
- Ignition coil and ignition device26 Feb 2026US 2026/0058054 A1Diamond&Zebra Electric Mfg. Co., Ltd.
Most cited
By later US patents
- Internal combustion engine control for improved fuel efficiency208US 7,577,511 B1Tula Technology, Inc. · 2009
- Ignition system power converter and controller203US 5,558,071 ACombustion Electromagnetics, Inc. · 1996
- Process and apparatus for intermittent control of a cyclically operating internal combustion engine201US 4,509,488 ADaimler-Benz Aktiengesellschaft · 1985
- Control system for two cycle direct injection engine and the method thereof165US 6,158,411 AFuji Jukogyo Kabushiki Kaisha · 2000
- Compensation circuit for an automotive ignition sensing system165US 6,392,315 B1Delphi Technologies, Inc. · 2002