F02F 1/42
Shape or arrangement of intake or exhaust channels in cylinder heads
F02F1/42 (Shape or arrangement of intake or exhaust channels in cylinder heads) appears on 1,353 US grants and 602 published applications in this corpus.
Search patents in F02F- Granted patents
- 1,353
- Published applications
- 602
- Assignees
- 305
- Inventors
- 2,306
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 15 | 0 |
| 1979 | 4 | 0 |
| 1980 | 11 | 0 |
| 1981 | 12 | 0 |
| 1982 | 10 | 0 |
| 1983 | 8 | 0 |
| 1984 | 31 | 0 |
| 1985 | 43 | 0 |
| 1986 | 24 | 0 |
| 1987 | 55 | 0 |
| 1988 | 49 | 0 |
| 1989 | 45 | 0 |
| 1990 | 48 | 0 |
| 1991 | 39 | 0 |
| 1992 | 43 | 0 |
| 1993 | 43 | 0 |
| 1994 | 39 | 0 |
| 1995 | 31 | 0 |
| 1996 | 35 | 0 |
| 1997 | 36 | 0 |
| 1998 | 50 | 0 |
| 1999 | 48 | 0 |
| 2000 | 41 | 0 |
| 2001 | 39 | 20 |
| 2002 | 39 | 46 |
| 2003 | 48 | 27 |
| 2004 | 34 | 40 |
| 2005 | 37 | 19 |
| 2006 | 27 | 10 |
| 2007 | 10 | 12 |
| 2008 | 4 | 11 |
| 2009 | 5 | 19 |
| 2010 | 10 | 16 |
| 2011 | 10 | 10 |
| 2012 | 5 | 19 |
| 2013 | 12 | 17 |
| 2014 | 18 | 20 |
| 2015 | 18 | 31 |
| 2016 | 15 | 32 |
| 2017 | 25 | 44 |
| 2018 | 32 | 35 |
| 2019 | 40 | 43 |
| 2020 | 29 | 33 |
| 2021 | 44 | 34 |
| 2022 | 27 | 22 |
| 2023 | 25 | 14 |
| 2024 | 13 | 18 |
| 2025 | 9 | 4 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02F 1/4214Specially adapted for four or more valves per cylinder857
- F02F 1/4235Of intake channels216
- F02F 1/4264Of exhaust channels156
- F02F 1/4285Of both intake and exhaust channel100
- F02F 1/4228Helically-shaped channels64
- F02F 2001/4207Arrangements with one conduit connected with two valvesIndexing code6
Recent patents
- Cylinder block and internal combustion engine system22 Sep 2026US 12,742,432 B2Cummins Inc.
- Intake over intake engine21 Jul 2026US 12,687,135 B1
- Engine assembly oil management14 Jul 2026US 12,680,519 B2Arctic Cat Inc.
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Engine cylinder head with temperature-reducing pressure sensor bore3 Mar 2026US 12,565,853 B2Caterpillar Inc.
- Passive prechamber fueling device and method23 Jul 2026US 2026/0210285 A1Aramco Services Company
- Interchangeable engine assembly18 Jun 2026US 2026/0168462 A1Arctic Cat Inc.
- Cylinder head4 Jun 2026US 2026/0153061 A1Toyota Jidosha Kabushiki Kaisha
- Swirl generating intake ports for internal combustion engines16 Apr 2026US 2026/0104004 A1Cummins Inc.
- Internal combustion engine having a top-down cooling concept12 Mar 2026US 2026/0071587 A1AVL List GmbH
Most cited
By later US patents
- In-cylinder direct-injection spark-ignition engine98US 6,138,639 ANissan Motor Co., Ltd. · 2000
- Adjustable (D)-port insert header for internal combustion engines91US 4,302,935 A1981
- Structure of an exhaust port in an internal combustion engine85US 5,816,210 ANissan Diesel Motor Co., Ltd. · 1998
- Valve operating system for internal combustion engine80US 5,669,341 AHonda Giken Kogyo Kabushiki Kaisha · 1997
- Direct fuel injection type spark ignition internal combustion engine having a squish flow for assisting fuel evaporation75US 4,920,937 AToyota Jidosha Kabushiki Kaisha · 1990