Automated non-synchronized gear-change transmission and method for gear change in such a transmission

Abstract

An automated non-synchronised gear-change transmission for a motor vehicle includes a transmission input shaft and a pressure-oil lubrication device. The pressure-oil lubrication device includes a pump driven at least indirectly by the transmission input shaft, and a cross-section modification device disposed on a downstream side of the pump. The cross-section modification device is configured to modify a flow cross section on the downstream side of the pump.

What is claimed  
     
         1 . An automated non-synchronised gear-change transmission for a motor vehicle, comprising: 
 a transmission input shaft; and    a pressure-oil lubrication device including 
 a pump driven at least indirectly by the transmission input shaft, and  
 a cross-section modification device disposed on a downstream side of the pump, wherein the cross-section modification device is configured to modify a flow cross section on the downstream side of the pump.  
   
     
     
         2 . The transmission according to  claim 1 , wherein the cross-section modification device reduces the flow cross section during an upshift for the purpose of reducing the rotational speed of the transmission input shaft.  
     
     
         3 . The transmission according to  claim 2 , wherein the cross-section modification device is arranged on an oil distribution duct of the pressure-oil lubrication device.  
     
     
         4 . The transmission according to  claim 3 , wherein the cross-section modification device has an actuator which can be activated by a control device.  
     
     
         5 . The transmission according to  claim 4 , wherein the cross-section modification device is controlled as a function of at least one variable of the motor vehicle.  
     
     
         6 . The transmission according to  claim 3 , further comprising an actuating device, wherein the actuating device controls the cross-section modification device and shift elements of the transmission.  
     
     
         7 . The transmission according to  claim 3 , wherein the pressure-oil lubrication device has a pressure-limiting device on a delivery side of the pressure-oil lubrication device.  
     
     
         8 . The transmission according to  claim 3 , wherein the pressure-oil lubrication device has a heat exchange element.  
     
     
         9 . The transmission according to  claim 1 , wherein the cross-section modification device is arranged on an oil distribution duct of the pressure-oil lubrication device.  
     
     
         10 . The transmission according to  claim 1 , wherein the cross-section modification device has an actuator which can be activated by a control device.  
     
     
         11 . The transmission according to  claim 10 , wherein the cross-section modification device is controlled as a function of at least one variable of the motor vehicle.  
     
     
         12 . The transmission according to  claim 1 , further comprising an actuating device, wherein the actuating device controls the cross-section modification device and shift elements of the transmission.  
     
     
         13 . The transmission according to  claim 1 , wherein the pressure-oil lubrication device has a pressure-limiting device on a delivery side of the pressure-oil lubrication device.  
     
     
         14 . The transmission according to  claim 1 , wherein the pressure-oil lubrication device has a heat exchange element.  
     
     
         15 . A method for gear change in an automated non-synchronized gear-change transmission of a motor vehicle with a pressure-oil lubrication device, the method comprising: 
 in the event of an upshift from an original gear into a target gear, after a disengagement of the original gear, reducing a flow cross section on a delivery side of a pump which is connected to an input shaft of the gear-change transmission.    
     
     
         16 . The method according to  claim 15 , wherein at least partially closing a clutch arranged between a drive machine and the gear-change transmission at least between the disengagement of the original gear and a selection of the target gear.