Patent ID: 7066863

Claim:
A drive train for a mobile vehicle comprising: a drive engine ( 1 ) for driving both a shiftable step-down transmission ( 5 ), for driving a propulsion drive, and an auxiliary drive ( 6 ), for driving a hydraulic pump ( 7 ) of a working hydraulic system; a hydrodynamic torque converter coupling the drive engine ( 1 ) to the shiftable step-down transmission ( 6 ) and a converter bridging clutch ( 2 ) releasably coupling a pump impeller ( 3 ) of the hydrodynamic torque converter to the drive engine ( 1 ); and an electronic control unit ( 10 ) for receiving a signal from a selector lever ( 8 ) and controlling operation of the working hydraulic system and receiving a signal from a driving pedal ( 11 ) and controlling operation of the propulsion drive, and the electronic control unit ( 10 ) controlling the drive engine ( 1 ) and the clutch ( 2 ) to establish a driving speed of the propulsion drive and a speed of the auxiliary drive ( 6 ) dependent upon varying positions of the driving pedal ( 11 ) and the selector lever ( 8 ); and when the drive engine ( 1 ) is operating at maximum power, the clutch ( 2 ) is engaged and the selector lever ( 8 ) is then actuated, the clutch ( 2 ) is actuated in a disengaging direction and the drive engine ( 1 ) is regulated so that the auxiliary drive ( 6 ) reaches a defined speed and b driving speed of the propulsion drive is dependent upon the varying positions of the driving pedal ( 11 ) and the selector lever ( 8 ) and is reduced as the driving resistance increases.