F01L 2001/34443
Cleaning control of oil control valves
Official title: {Cleaning control of oil control valves}
F01L2001/34443 (Cleaning control of oil control valves) appears on 21 US grants and 16 published applications in this corpus.
Search patents in F01L- Granted patents
- 21
- Published applications
- 16
- Assignees
- 23
- Inventors
- 66
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 7 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control device for hydraulic control valve28 Apr 2026US 12,612,912 B2Hitachi Astemo, Ltd.
- Variable camshaft timing valve assembly24 May 2022US 11,339,688 B2BorgWarner Inc.
- Control screw3 May 2022US 11,319,843 B2Delphi Automotive Systems Luxembourg SA
- Method for cleaning continuously variable valve timing system1 Oct 2019US 10,428,731 B2Hyundai Motor Company
- Variable valve timing apparatus28 Aug 2018US 10,060,305 B2Denso Corporation
- Control Device for Hydraulic Control Valve27 Mar 2025US 2025/0101979 A1Hitachi Astemo, Ltd.
- Variable camshaft timing valve assembly29 Jul 2021US 2021/0231032 A1BorgWarner Inc.
- Control screw31 Dec 2020US 2020/0408114 A1Dellphi Automotive Systems Luxembourg SA
- Method for cleaning continuously variable valve timing system18 Oct 2018US 2018/0298815 A1Hyundai Motor Company
- Variable valve timing apparatus4 May 2017US 2017/0122140 A1Denso Corporation
Most cited
By later US patents
- Control device of an internal combustion engine29US 6,330,869 B1Honda Giken Kogyo Kabushiki Kaisha · 2001
- Method and circuit for actively cleaning electrohydraulic valves in a hydraulic control valve circuit18US 6,170,506 B2Ford Global Technologies, LLC · 2001
- Variable valve timing control device12US 7,444,964 B2Aisin Seiki Kabushiki Kaisha · 2008
- Valve timing control apparatus for internal combustion engine9US 5,400,747 ANippondenso Co., Ltd. · 1995
- Oil flow control valve9US 6,968,816 B2Denso Corporation · 2005