F02B 31/00
Modifying induction systems for imparting a rotation to the charge in the
Official title: Modifying induction systems for imparting a rotation to the charge in the cylinder (air intakes or induction systems for internal-combustion engines F02M35/10)
F02B31/00 (Modifying induction systems for imparting a rotation to the charge in the) appears on 1,100 US grants and 632 published applications in this corpus.
Search patents in F02B- Granted patents
- 1,100
- Published applications
- 632
- Assignees
- 230
- Inventors
- 1,835
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 23 | 0 |
| 1981 | 38 | 0 |
| 1982 | 27 | 0 |
| 1983 | 11 | 0 |
| 1984 | 48 | 0 |
| 1985 | 29 | 0 |
| 1986 | 16 | 0 |
| 1987 | 23 | 0 |
| 1988 | 17 | 0 |
| 1989 | 18 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 16 | 0 |
| 1994 | 16 | 0 |
| 1995 | 11 | 0 |
| 1996 | 22 | 0 |
| 1997 | 37 | 0 |
| 1998 | 38 | 0 |
| 1999 | 35 | 0 |
| 2000 | 30 | 0 |
| 2001 | 36 | 21 |
| 2002 | 24 | 39 |
| 2003 | 54 | 37 |
| 2004 | 48 | 47 |
| 2005 | 35 | 34 |
| 2006 | 46 | 29 |
| 2007 | 31 | 33 |
| 2008 | 23 | 33 |
| 2009 | 18 | 39 |
| 2010 | 25 | 37 |
| 2011 | 25 | 15 |
| 2012 | 15 | 21 |
| 2013 | 21 | 12 |
| 2014 | 14 | 20 |
| 2015 | 13 | 27 |
| 2016 | 11 | 30 |
| 2017 | 28 | 28 |
| 2018 | 28 | 24 |
| 2019 | 29 | 31 |
| 2020 | 26 | 27 |
| 2021 | 28 | 22 |
| 2022 | 18 | 8 |
| 2023 | 6 | 6 |
| 2024 | 4 | 2 |
| 2025 | 2 | 3 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stratified nitrogen enriched air (NEA) strategies and methods to reduce NOx emissions from engines12 May 2026US 12,624,654 B2Saudi Arabian Oil Company
- Internal combustion engine2 Dec 2025US 12,486,795 B2JCB Research
- Airway structure, cylinder cover, and miller-profile engine18 Feb 2025US 12,228,093 B2Weichai Power Co., Ltd.
- Intake system for an internal combustion engine, in particular of a motor vehicle31 Dec 2024US 12,180,881 B2Bayerische Motoren Werke Aktiengesellschaft
- Internal combustion engine17 Sep 2024US 12,092,056 B2JCB Research
- Passive prechamber fueling device and method23 Jul 2026US 2026/0210285 A1Aramco Services Company
- Gaseous fuel combustion system and method utilizing a piston reentrant feature for hastened fuel-air mixing16 Jul 2026US 2026/0201829 A1Caterpillar Inc.
- Ignition system23 Apr 2026US 2026/0110285 A1Volvo Truck Corporation
- Swirl generating intake ports for internal combustion engines16 Apr 2026US 2026/0104004 A1Cummins Inc.
- Engine26 Mar 2026US 2026/0085629 A1Yanmar Holdings Co., Ltd.
Most cited
By later US patents
- 6-cycle engine with regenerator168US 8,186,334 B22012
- System and method for engine starting160US 7,159,568 B1Ford Global Technologies, LLC · 2007
- System and method for engine fuel blend control110US 7,287,492 B2Ford Global Technologies, LLC · 2007
- Exhaust gas purification device for an internal combustion engine105US 5,732,554 AToyota Jidosha Kabushiki Kaisha · 1998
- Method for controlling injection timing of an internal combustion engine103US 7,278,396 B2Ford Global Technologies, LLC · 2007