F02D 13/0284
Variable control of exhaust valves only
Official title: {Variable control of exhaust valves only}
F02D13/0284 (Variable control of exhaust valves only) appears on 188 US grants and 57 published applications in this corpus.
Search patents in F02D- Granted patents
- 188
- Published applications
- 57
- Assignees
- 62
- Inventors
- 253
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 9 | 0 |
| 1991 | 12 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 14 | 0 |
| 2000 | 12 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 7 |
| 2003 | 7 | 7 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 4 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 5 |
| 2013 | 2 | 1 |
| 2014 | 2 | 2 |
| 2015 | 3 | 4 |
| 2016 | 3 | 2 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 4 |
| 2020 | 2 | 4 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 3 | 4 |
| 2024 | 1 | 1 |
| 2025 | 2 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Combustion abnormality monitoring device for two-stroke engine16 Jun 2026US 12,655,809 B2Kawasaki Motors, Ltd.
- Multi-port exhaust valve17 Feb 2026US 12,553,402 B2Arctic Cat Inc.
- Variable exhaust control system11 Nov 2025US 12,467,399 B2
- Engine and method of operating the same30 Sep 2025US 12,429,003 B2Alpha-Otto Technologies Inc.
- Engine and method of operating the same10 Dec 2024US 12,163,480 B2Alpha-Otto Technologies Inc.
- Engine and method of operating the same1 Jan 2026US 2026/0002480 A1Alpha-Otto Technologies Inc.
- Combustion abnormality monitoring device for two-stroke engine1 Jan 2026US 2026/0002488 A1Kawasaki Motors, Ltd.
- Operating Modes for Two-Cycle Uniflow-Scavenged Diesel Engine21 Aug 2025US 2025/0264068 A1
- Engine and method of operating the same27 Mar 2025US 2025/0101925 A1Alpha-Otto Technologies Inc.
- Exhaust valve controller for two-stroke engines13 Feb 2025US 2025/0052206 A1Arctic Cat Inc.
Most cited
By later US patents
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Exhaust means for two cycle engines63US 4,121,552 AYamaha Hatsudoki Kabushiki Kaisha · 1978
- Exhaust timing control device for a two-cycle engine46US 4,364,346 AYamaha Hatsudoki Kabushiki Kaisha · 1982
- Variable-cycle engine42US 5,022,353 AIsuzu Ceramics Research Institute Co., Ltd. · 1991
- Exhaust port control valve for two stroke engine38US 5,000,131 AYamaha Hatsudoki Kabushiki Kaisha · 1991