Hydraulic control apparatus for vehicle power transmitting syste

Details Hydraulic control apparatus for vehicle power transmitting syste Hydraulic control apparatus for vehicle power transmitting syste

1990-02-07

1991-10-01

Bui, Thuy M.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Speed responsive

474 28, F16H 1102

Patent

active

050529803

ABSTRACT:
A hydraulic control apparatus for a power transmitting system for an automotive vehicle having a continuously variable transmission which has a first and a second shaft, a pair of variable-diameter pulleys provided on the first and second shafts, a belt connecting the pulleys, and a pair of hydraulic actuators for changing diameters of the pulleys, wherein a tension of the belt is controlled by regulating an actuating pressure in a driven side actuator of the hydraulic actuators which is provided on a driven one of the two shafts. The apparatus includes a pressure regulating valve which has a valve spool for regulating the actuating pressure in the driven side actuator, and a pressure-reducing chamber for receiving a pressure-reducing pilot pressure for biasing the spool for reducing the actuating pressure. The apparatus further includes a pilot pressure generator for generating the pressure-reducing pilot pressure to be applied to the pressure-reducing chamber, when the detected vehicle running speed exceeds a predetermined value.

REFERENCES:
patent: 4152947 (1979-05-01), van Deursen et al.
patent: 4403975 (1983-09-01), Rattunde
patent: 4522086 (1985-06-01), Haley
patent: 4669336 (1987-06-01), Okada et al.
patent: 4718306 (1988-01-01), Shigematsu et al.
patent: 4857034 (1989-08-01), Kouno et al.
patent: 4867632 (1989-09-01), Soga et al.

Affiliated with

Also associated with

Rating

Hydraulic control apparatus for vehicle power transmitting syste does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic control apparatus for vehicle power transmitting syste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control apparatus for vehicle power transmitting syste will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1751945