Valve timing adjusting apparatus for internal combustion engines

Details Valve timing adjusting apparatus for internal combustion engines Valve timing adjusting apparatus for internal combustion engines

1998-01-29

2000-02-15

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, F01L 1344

Patent

active

06024061&

ABSTRACT:
A valve timing adjusting apparatus that selectively controls a restraint mechanism for restraining relative rotation between a housing member and a vane member to increase the operational life thereof. When a vane rotor is held at a most lagging angular position, an end holding mode is executed to pull out a stopper piston from a stopper hole by fluid pressures of both a leading angle side and a lagging angle side. As a result, when the vane rotor rotates from the most lagging angular position to the leading angle side, torsional forces on the stopper piston and the stopper hole can be minimized as the vane member direction of rotation changes. Since a fluid pressure has already been applied to each of leading angle fluid pressure chambers in the end holding mode, the vane rotor can be rotated from the most lagging angular position to the leading angle side quickly by increasing fluid pressure applied to each of the leading angle fluid pressure chambers without the need to switch a fluid path. In addition, since the fluid pressure applied to each of the leading angle fluid pressure chambers in the end holding mode is smaller than fluid pressure for rotating the vane rotor to the leading angle side, generation of impact sound due to collisions of vanes can be avoided.

REFERENCES:
patent: 4858572 (1989-08-01), Shirai et al.
patent: 5107804 (1992-04-01), Becker et al.
patent: 5469818 (1995-11-01), Yoshioka et al.
patent: 5522352 (1996-06-01), Adachi et al.
patent: 5562071 (1996-10-01), Urushihata et al.
patent: 5628286 (1997-05-01), Kato et al.
patent: 5666914 (1997-09-01), Ushida et al.

Affiliated with

Also associated with

Rating

Valve timing adjusting apparatus for internal combustion engines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve timing adjusting apparatus for internal combustion engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve timing adjusting apparatus for internal combustion engines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1897628