F02P 17/12
Testing characteristics of the spark, ignition voltage or current
Official title: Testing characteristics of the spark, ignition voltage or current (testing of sparking plugs H01T13/60)
F02P17/12 (Testing characteristics of the spark, ignition voltage or current) appears on 892 US grants and 511 published applications in this corpus.
Search patents in F02P- Granted patents
- 892
- Published applications
- 511
- Assignees
- 250
- Inventors
- 1,210
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 10 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 17 | 0 |
| 1992 | 13 | 0 |
| 1993 | 32 | 0 |
| 1994 | 34 | 0 |
| 1995 | 42 | 0 |
| 1996 | 32 | 0 |
| 1997 | 29 | 0 |
| 1998 | 26 | 0 |
| 1999 | 26 | 0 |
| 2000 | 26 | 0 |
| 2001 | 28 | 3 |
| 2002 | 25 | 18 |
| 2003 | 24 | 21 |
| 2004 | 25 | 30 |
| 2005 | 27 | 22 |
| 2006 | 22 | 13 |
| 2007 | 8 | 15 |
| 2008 | 13 | 11 |
| 2009 | 9 | 24 |
| 2010 | 19 | 25 |
| 2011 | 12 | 17 |
| 2012 | 13 | 17 |
| 2013 | 17 | 17 |
| 2014 | 11 | 15 |
| 2015 | 15 | 35 |
| 2016 | 27 | 30 |
| 2017 | 36 | 32 |
| 2018 | 30 | 44 |
| 2019 | 35 | 30 |
| 2020 | 32 | 22 |
| 2021 | 35 | 19 |
| 2022 | 23 | 28 |
| 2023 | 19 | 4 |
| 2024 | 13 | 7 |
| 2025 | 6 | 6 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Turbulent jet ignition engine misfire detection24 Feb 2026US 12,560,142 B2Fca US LLC
- Adaptive spark energy control10 Feb 2026US 12,546,279 B2Altronic, Inc.
- Engine ignition systems and control methods therefor2 Dec 2025US 12,486,822 B2Hamilton Sundstrand Corporation
- Method and apparatus to control an ignition system16 Sep 2025US 12,416,282 B2BorgWarner Luxembourg Automotive Systems SA
- Engine ignition systems15 Jul 2025US 12,359,648 B2Hamilton Sundstrand Corporation
- System and method for monitoring by ion current the combustion in an internal combustion engine8 Oct 2026US 2026/0309113 A1Ferrari S.P. A.
- Preignition detection for hydrogen combustion engines24 Sep 2026US 2026/0286925 A1Cummins Inc.
- System and method for detecting engine conditions using ignition system20 Aug 2026US 2026/0243222 A1Altronic, Inc.
- Hot surface igniter temperature control system and method26 Mar 2026US 2026/0086587 A1Chongqing Le-Mark Technology Co
- Ignition system and control method19 Feb 2026US 2026/0049589 A1Clean Combustion Engine Technology Inc.
Most cited
By later US patents
- Exhaust gas control using a spark plug ionization signal198US 6,980,903 B2Visteon Global Technologies, Inc. · 2005
- Compensation circuit for an automotive ignition sensing system165US 6,392,315 B1Delphi Technologies, Inc. · 2002
- Method and apparatus for detecting ion current in an internal combustion engine ignition system95US 4,648,367 ASaab-Scania Aktiebolog · 1987
- Method and apparatus for detecting ionization signal in diesel and dual mode engines with plasma discharge system68US 6,994,073 B2Woodward Governor Company · 2006
- Apparatus and method for controlling air/fuel ratio using ionization measurements66US 6,029,627 AAdrenaline Research, Inc. · 2000