F02D 15/00
Varying compression ratio
F02D15/00 (Varying compression ratio) appears on 782 US grants and 781 published applications in this corpus.
Search patents in F02D- Granted patents
- 782
- Published applications
- 781
- Assignees
- 193
- Inventors
- 1,162
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 1 |
| 2002 | 7 | 12 |
| 2003 | 27 | 32 |
| 2004 | 25 | 31 |
| 2005 | 15 | 22 |
| 2006 | 21 | 20 |
| 2007 | 27 | 47 |
| 2008 | 32 | 30 |
| 2009 | 20 | 31 |
| 2010 | 24 | 38 |
| 2011 | 14 | 38 |
| 2012 | 29 | 45 |
| 2013 | 35 | 26 |
| 2014 | 39 | 34 |
| 2015 | 20 | 59 |
| 2016 | 49 | 36 |
| 2017 | 33 | 43 |
| 2018 | 49 | 61 |
| 2019 | 60 | 55 |
| 2020 | 51 | 58 |
| 2021 | 54 | 28 |
| 2022 | 27 | 16 |
| 2023 | 15 | 7 |
| 2024 | 4 | 5 |
| 2025 | 6 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Camless reciprocating engine control system10 Mar 2026US 12,571,356 B2Adaptive Camless Technology, LLC
- Work vehicle power system with dynamic auto-ignition assistance compression ratios17 Feb 2026US 12,553,395 B2Deere & Company
- Control system for an internal combustion engine, internal combustion engine system, and method for controlling internal combustion engine9 Sep 2025US 12,410,760 B2Cummins Power Generation Inc.
- Diagnostic apparatus and diagnostic method for rotational angle sensor, and control apparatus for actuator19 Aug 2025US 12,392,646 B2Hitachi Astemo, Ltd.
- Variable displacement engine29 Jul 2025US 12,372,035 B2
- Method and Apparatus for Non-Fossil Fuel Internal Combustion Engine27 Aug 2026US 2026/0251112 A1MayMaan Research, LLC
- Continuously Variable Displacement and Variable Compression Ratio Mechanism and an Engine Provided with the Same16 Apr 2026US 2026/0104005 A1Hyundai Motor Company
- Control system for an internal combustion engine, internal combustion engine system, and method for controlling internal combustion engine4 Dec 2025US 2025/0369397 A1Cummins Power Generation Inc.
- Variable compression ratio device16 Oct 2025US 2025/0320836 A1
- Control system for an internal combustion engine, internal combustion engine system, and method for controlling internal combustion engine29 May 2025US 2025/0172101 A1Cummins Power Generation Inc.
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