Operator interface for controlling a drive engine and a steplessly adjustable gearbox.

摘要

The basic load or speed of rotation of the vehicle engine is set by a manual throttle lever 10 acting through a hydraulic coupling 14, 16 on an adjusting lever 18. The speed of a PTO shaft 52 is thus preset. A control device 64 for a steplessly variable gearbox can similarly be set by a speed adjusting lever 56 acting through a hydraulic coupling 58, 60 on an adjusting lever 62. The desired vehicle speed or gearbox output speed is thus pre-set. The brake pedal 40 and the accelerator pedal 42 can modulate the preset values by means of electromagnetic valves 26 and 70 which control separate hydraulic circuits for the couplings 14, 16 and 58, 60. Mode switches 48 and 80 associated with the levers 10 and 56 allow the couplings 14, 16 and 58, 60 respectively to be blocked to maintain the preset values or released for modulation by the pedals 40 and 42. IMAGE