Hydraulic phasers and valve means therefor

Details Hydraulic phasers and valve means therefor Hydraulic phasers and valve means therefor

1990-07-27

1992-06-09

Luong, Vinh T.

Machine element or mechanism

Elements

Cams

74567, 123 9017, F01L 134

Patent

active

051196913

ABSTRACT:
A variable camshaft phaser (VCP) has various embodiments and features including inner and outer helical splines for phase changing and return springs mounted in pockets to shorten overall length and relieve lash take-up friction on the piston return strokes. A three-way feed-discharge valve limits hydraulic actuating oil flow to that required to operate the drive pistons for phase changing operation. The three-way valve may be carried in a srew or fastener that secures the phaser to a camshaft or other rotary member.

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