F02D 13/023
The change of valve timing is caused by the change in valve
Official title: {the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related}
F02D13/023 (The change of valve timing is caused by the change in valve) appears on 163 US grants and 153 published applications in this corpus.
Search patents in F02D- Granted patents
- 163
- Published applications
- 153
- Assignees
- 51
- Inventors
- 302
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 8 |
| 2003 | 6 | 9 |
| 2004 | 9 | 9 |
| 2005 | 7 | 10 |
| 2006 | 11 | 21 |
| 2007 | 17 | 19 |
| 2008 | 18 | 9 |
| 2009 | 3 | 15 |
| 2010 | 9 | 10 |
| 2011 | 6 | 1 |
| 2012 | 10 | 5 |
| 2013 | 4 | 5 |
| 2014 | 2 | 1 |
| 2015 | 5 | 4 |
| 2016 | 3 | 6 |
| 2017 | 4 | 3 |
| 2018 | 5 | 4 |
| 2019 | 3 | 3 |
| 2020 | 7 | 4 |
| 2021 | 3 | 4 |
| 2022 | 4 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Self-charged four stroke one-cycle combustion cylinder for internal combustion engine29 Jul 2025US 12,372,016 B1
- Variable-lift valve train having at least two working positions26 Nov 2024US 12,152,513 B2Bayerische Motoren Werke Aktiengesellschaft
- System and method for variable actuation of valves of an internal combustion engine11 Oct 2022US 11,466,598 B2C. R. F. Societa Consortile per Azioni
- Method for estimating and controlling the intake efficiency of an internal combustion engine12 Jul 2022US 11,384,701 B2Marelli Europe S.P.A.
- Valve rocker arm assembly, variable air distribution mechanism and engine7 Jun 2022US 11,352,961 B2Weichai Power Co., Ltd.
- Two-step valve closing rocker assembly16 Mar 2023US 2023/0081789 A1
- Camshaft phase error monitoring9 Jun 2022US 2022/0178325 A1Jaguar Land Rover Limited
- Variable-Lift Valve Train Having at Least Two Working Positions24 Mar 2022US 2022/0090523 A1Bayerische Motoren Werke Aktiengesellschaft
- Method for Estimating and Controlling the Intake Efficiency of an Internal Combustion Engine4 Nov 2021US 2021/0340925 A1Marelli Europe S.P.A.
- System and method for variable actuation of valves of an internal combustion engine3 Jun 2021US 2021/0164368 A1C. R. F. Societa Consortile per Azioni
Most cited
By later US patents
- System for controlling a valve mechanism for an internal combustion engine104US 5,398,502 AFuji Jukogyo Kabushiki Kaisha · 1995
- Internal combustion engine control system57US 6,055,948 AHitachi, Ltd. · 2000
- Apparatus for and method of controlling internal combustion engine56US 5,666,916 AHitachi, Ltd. · 1997
- Cylinder cutoff control apparatus of internal combustion engine51US 7,146,966 B2Hitachi, Ltd. · 2006
- Method for effectively diagnosing the operational state of a variable valve lift device47US 7,063,057 B1Delphi Technologies, Inc. · 2006