AUTOMATED TRANSMISSION AND METHOD FOR OPERATING AN AUTOMATED TRANSMISSION
First Claim
1. An automated transmission comprising:
- a hydraulic control device; and
one or more hydraulically actuated gear units, wherein the hydraulic control device comprises;
a control unit for setting actuating pressures on the gear unit;
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; and
whereinthe automated transmission further comprises a device for switching through an actuating hydraulic pressure to the base pressure control valve.
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Accused Products
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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Citations
21 Claims
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1. An automated transmission comprising:
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a hydraulic control device; and one or more hydraulically actuated gear units, wherein the hydraulic control device comprises; a control unit for setting actuating pressures on the gear unit; 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; and
whereinthe automated transmission further comprises a device for switching through an actuating hydraulic pressure to the base pressure control valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for operating an automated transmission comprising:
- a hydraulic control device; and
one or more hydraulically actuated gear units, wherein 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; and
wherein the automated transmission further comprises a device for switching through an actuating hydraulic pressure to the base pressure control valve;
said method comprising;adjusting by the base pressure control valve a hydraulic base pressure is adjusted at the hydraulic control device; and adjusting by suitable pressure control valves 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. - View Dependent Claims (18, 19, 20, 21)
- a hydraulic control device; and
Specification