Automated transmission and method for operating an automated transmission
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United States of America Patent
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Jun 30, 2015
Grant Date -
Jun 14, 2012
app pub date -
Jun 28, 2010
filing date -
Jun 26, 2009
priority date (Note) -
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Abstract
An automated transmission comprises a hydraulic control device and one or more hydraulically actuated gear units. The hydraulic control device comprises a control unit for setting actuating pressures on the gear units; a base pressure control valve for adjusting a hydraulic base pressure of the hydraulic control device; and a device for controlling the base pressure control valve dependent on the actuating pressures. The automated transmission further comprises a device for switching through an actuating hydraulic pressure to the base pressure control valve. A method comprises the method steps of adjusting a hydraulic base pressure at the hydraulic control device; adjusting actuating pressures for actuating one or more transmission units; switching through one of the actuating pressures to the base pressure control valve; and adjusting the hydraulic base pressure by one of the actuating pressures.
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