Controller for vane-type variable timing adjusting mechanism

Details Controller for vane-type variable timing adjusting mechanism Controller for vane-type variable timing adjusting mechanism

2007-04-23

2010-12-07

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090120, C464S160000

Reexamination Certificate

active

07845321

ABSTRACT:
One-way valves (30, 31) are provided in a hydraulic supply passage (28) in an advance chamber (18) and a hydraulic supply passage (29) in a retard chamber (19) respectively for preventing reverse flow of oil from each chamber (18, 19) and drain oil passages (32, 33) bypassing the one-way valves respectively disposed in the hydraulic supply passages (28, 29) of the respective hydraulic chambers (18, 19) are provided to be in parallel therewith. Drain switching valves (34, 35) are disposed in the respective drain oil passages (32, 33). A hydraulic control valve (21) for controlling a hydraulic pressure supplied to the advance chamber (18) and the retard chamber (19) includes integrally a drain switching control function (38) for controlling a hydraulic pressure supplied to the respective drain switching valves (34, 35). A point where a VCT response speed rapidly changes by switching opening/closing of the drain switching valves (34, 35) is learned to improve a control characteristic in the vicinity of the rapidly changing point of the VCT response speed.

REFERENCES:
patent: 5218935 (1993-06-01), Quinn, Jr. et al.
patent: 5497738 (1996-03-01), Siemon et al.
patent: 6330870 (2001-12-01), Inoue et al.
patent: 6513468 (2003-02-01), Takahashi et al.
patent: 6763791 (2004-07-01), Gardner et al.
patent: 7434554 (2008-10-01), Nagashima
patent: 2005-009393 (2005-01-01), None
International Search Report for PCT/JP2007/058695 dated Jul. 24, 2007.

Affiliated with

Also associated with

Rating

Controller for vane-type variable timing adjusting mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Controller for vane-type variable timing adjusting mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller for vane-type variable timing adjusting mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4180419