Invention Grant
- Patent Title: Valve timing control apparatus
- Patent Title (中): 气门正时控制装置
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Application No.: US12325008Application Date: 2008-11-28
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Publication No.: US07987827B2Publication Date: 2011-08-02
- Inventor: Toshiki Fujiyoshi , Osamu Sato
- Applicant: Toshiki Fujiyoshi , Osamu Sato
- Applicant Address: JP Kariya
- Assignee: Denso Corporation
- Current Assignee: Denso Corporation
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye PC
- Priority: JP2007-307987 20071128
- Main IPC: F01L1/34
- IPC: F01L1/34

Abstract:
A valve timing control apparatus for controlling valve timing includes a first rotor, a second rotor, and a controller. The second rotor and the first rotor defines therebetween an advance chamber and a retard chamber. The controller includes a supply passage, at least one drain passage, a spool valve, at least one connection passage, and at least one check valve. The at least one connection passage connects the supply passage to the at least one drain passage when a spool of the spool valve is moved to one of the advance and retard positions. The at least one check valve is respectively provided in the at least one connection passage. The check valve allows working fluid to flow in a direction from the at least one drain passage toward the supply passage and limits working fluid from flowing in an opposite direction.
Public/Granted literature
- US20090133652A1 VALVE TIMING CONTROL APPARATUS Public/Granted day:2009-05-28
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