F02D 15/04
Varying compression ratio: by alteration of volume of compression space without changing
Official title: by alteration of volume of compression space without changing piston stroke
F02D15/04 (Varying compression ratio: by alteration of volume of compression space without changing) appears on 329 US grants and 286 published applications in this corpus.
Search patents in F02D- Granted patents
- 329
- Published applications
- 286
- Assignees
- 106
- Inventors
- 459
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 1 |
| 2002 | 6 | 7 |
| 2003 | 12 | 14 |
| 2004 | 15 | 17 |
| 2005 | 5 | 12 |
| 2006 | 14 | 11 |
| 2007 | 12 | 35 |
| 2008 | 20 | 13 |
| 2009 | 12 | 17 |
| 2010 | 11 | 14 |
| 2011 | 7 | 16 |
| 2012 | 15 | 24 |
| 2013 | 12 | 8 |
| 2014 | 18 | 13 |
| 2015 | 8 | 21 |
| 2016 | 19 | 11 |
| 2017 | 14 | 8 |
| 2018 | 12 | 13 |
| 2019 | 7 | 8 |
| 2020 | 9 | 8 |
| 2021 | 13 | 7 |
| 2022 | 7 | 5 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Diagnostic apparatus and diagnostic method for rotational angle sensor, and control apparatus for actuator19 Aug 2025US 12,392,646 B2Hitachi Astemo, Ltd.
- Variable compression ratio device15 Jul 2025US 12,359,629 B2
- Systems and methods for variable compression ratio phaser having a dual torsion spring arrangement30 Apr 2024US 11,970,987 B2HUSCO Automotive Holdings LLC
- Variable compression ratio device23 Jan 2024US 11,879,400 B2
- Compression ratio methods and systems for particulate filter regeneration28 Mar 2023US 11,614,042 B1GM Global Technology Operations LLC
- Variable compression ratio device16 Oct 2025US 2025/0320836 A1
- Variable compression ratio device2 May 2024US 2024/0141841 A1
- Systems and Methods for Variable Compression Ratio Phaser Having a Dual Torsion Spring Arrangement12 Oct 2023US 2023/0323825 A1HUSCO Automotive Holdings LLC
- Cranktrain phase adjuster for variable compression ratio11 Aug 2022US 2022/0252015 A1Schaeffler Technologies AG & Co. KG
- Internal combustion engine system19 May 2022US 2022/0154652 A1Volvo Truck Corporation
Most cited
By later US patents
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- Premixed charge compression ignition engine with optimal combustion control152US 6,230,683 B1Cummins Engine Company, Inc. · 2001
- Premixed charge compression ignition engine with optimal combustion control139US 6,286,482 B1Cummins Engine Company, Inc. · 2001
- Operation control system for internal combustion engine138US 4,993,386 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1991
- Multiple operating mode engine and method of operation134US 6,561,157 B2Cummins Inc. · 2003