Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1995-07-05
1996-10-08
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9013, F01L 902
Patent
active
055620701
ABSTRACT:
An engine valve assembly (10) within an electrohydraulic camless valvetrain cooperates with a hydraulic system (8) having a low pressure branch (70) and a high pressure branch (68) to selectively open and close engine valve (12). Engine valve (12) is affixed to a valve piston (16) within a piston chamber (18). A volume (42) below piston (16) is connected to high pressure branch (68) and a volume (20) above piston (16) is selectively connected to the high pressure branch (68) or the low pressure branch (70) via a rotary valve (34), to effect engine valve opening and closing. A motor (60) effects the rotation of the rotary valve (34). The rotary valve (34) includes an internal hollow (92) operatively and selectively connected to windows (86 and 90) in a valve sleeve (66) to allow high pressure and low pressure fluid flow through the valve (34).
REFERENCES:
patent: 3455209 (1967-02-01), Preston et al.
patent: 3738337 (1973-06-01), Massie
patent: 4446825 (1984-05-01), Giardini et al.
patent: 5058857 (1991-10-01), Hudson
patent: 5193494 (1993-03-01), Sono et al.
patent: 5209453 (1993-05-01), Aota et al.
patent: 5255641 (1993-10-01), Schechter
patent: 5275136 (1994-01-01), Schechter et al.
patent: 5367990 (1994-11-01), Schechter
patent: 5373817 (1994-12-01), Schechter et al.
patent: 5375419 (1994-12-01), Wright et al.
patent: 5404844 (1995-04-01), Schechter
patent: 5410994 (1995-05-01), Schechter
patent: 5419301 (1995-05-01), Schechter
patent: 5456221 (1995-10-01), Schechter
patent: 5456222 (1995-10-01), Schechter
patent: 5456223 (1995-10-01), Miller et al.
Levin Michael B.
Schechter Michael M.
Ford Motor Company
Lo Weilun
Wilkinson Donald A.
LandOfFree
Electrohydraulic camless valvetrain with rotary hydraulic actuat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrohydraulic camless valvetrain with rotary hydraulic actuat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrohydraulic camless valvetrain with rotary hydraulic actuat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-50835