Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1987-01-08
1989-05-09
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74866, 192 358, B60K 4112
Patent
active
048278050
ABSTRACT:
In a continually variable belt-driven transmission, a system for actuating and controlling the operation of the forward clutch and reverse clutch includes a source of hydraulic pressure regulated at line pressure, an accumulator control valve, a line and belt load control solenoid and solenoid-actuated valve, an accumulator, a decel disconnect solenoid-operated valve and a manual valve. The line and belt-load control valve regulates a pressure signal applied to the accumulator control valve whose output pressure develops, on the piston of the accumulator, a force that adds to a spring force tending to purge the accumulator and add that flow to the flow through an orifice directed through the manual valve to the selected clutch. The decel disconnect solenoid operates in accordance with a control signal that senses the occurrence of a hard wheel brake condition to vent the forward clutch, thereby permitting the pulleys of the transmission to turn during the braking condition sufficient to allow a drive ratio change to the lowest drive ratio, and thereafter to regulate clutch pressure to permit immediate reacceleration of the vehicle.
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Braun Leslie A.
Ford Motor Company
Harrington Donald J.
McKenzie Frank G.
Novais David
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