F02B 33/446
Having valves for admission of atmospheric air to engine
Official title: {having valves for admission of atmospheric air to engine, e.g. at starting}
F02B33/446 (Having valves for admission of atmospheric air to engine) appears on 178 US grants and 71 published applications in this corpus.
Search patents in F02B- Granted patents
- 178
- Published applications
- 71
- Assignees
- 67
- Inventors
- 329
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 1 |
| 2002 | 3 | 0 |
| 2003 | 2 | 6 |
| 2004 | 6 | 11 |
| 2005 | 8 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 2 |
| 2011 | 2 | 3 |
| 2012 | 0 | 5 |
| 2013 | 4 | 3 |
| 2014 | 5 | 4 |
| 2015 | 3 | 2 |
| 2016 | 5 | 3 |
| 2017 | 2 | 5 |
| 2018 | 0 | 3 |
| 2019 | 5 | 4 |
| 2020 | 3 | 3 |
| 2021 | 2 | 3 |
| 2022 | 4 | 3 |
| 2023 | 3 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Clutch-type air compressor system and control method and control apparatus thereof15 Jul 2025US 12,359,634 B2Zf Commercial Vehicle Systems (Qingdao) Co., Ltd.
- Bypass system for engine startup5 Mar 2024US 11,920,509 B2Cummins Inc.
- Reed valve and reed valve airbox21 Nov 2023US 11,821,356 B2Moto Tassinari, Inc.
- Supercharger for vehicle and method of controlling same4 Apr 2023US 11,619,163 B2Hyundai Mobis Co., Ltd.
- Methods and system for preparing an engine for starting14 Mar 2023US 11,603,818 B1Ford Global Technologies, LLC
- Clutch-type air compressor system and control method and control apparatus thereof8 May 2025US 2025/0146448 A1Zf Commercial Vehicle Systems (Qingdao) Co., Ltd.
- Improved reed valve and reed valve airbox19 Jan 2023US 2023/0014127 A1Moto Tassinari, Inc.
- Bypass system for engine startup6 Oct 2022US 2022/0316385 A1Cummins Inc.
- Supercharger for vehicle and method of controlling same22 Sep 2022US 2022/0298959 A1Hyundai Mobis Co., Ltd.
- Air feed system for an internal combustion engine23 Jun 2022US 2022/0195913 A1
Most cited
By later US patents
- Method and a device for regulation of a turbo-charging device135US 5,408,979 AAB Volvo · 1995
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Spark-assist type self-ignition engine92US 6,293,246 B1Toyota Jidosha Kabushiki Kaisha · 2001
- Internal combustion engine83US 6,279,550 B12001
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005