Hydraulic actuator for a vehicular power train

Details Hydraulic actuator for a vehicular power train Hydraulic actuator for a vehicular power train

2006-07-14

2010-02-02

Lorence, Richard M. (Department: 3655)

192 clutches and power-stop control

Clutches

Operators

C060S413000, C417S413200

Reexamination Certificate

active

07654377

ABSTRACT:
An actuator system includes a piezoelectric pump; an accumulator including a cylinder, a piston located in the cylinder, a port located at a first side of the piston and hydraulically connected to the pump outlet and a switching circuit, a relief port hydraulically connected to the reservoir and located at a second side of the piston, and a spring biasing the piston toward the port; and a hydraulically actuated servo including a front port hydraulically connected to the switching circuit, a back port hydraulically connected to the reservoir, and the servo causing the friction element alternately to engage and to disengage in response to a magnitude of hydraulic pressure in the servo.

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patent: 4309901 (1994-09-01), None

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