| 摘要 |
A control system (20) for a vehicle (10), the vehicle (10) including an engine (12), a variable transmission (30) for varying the transmission ratio between an output member (18) of the engine (12) and a ground engaging drive apparatus (13,14), the control system (20) including at least one control apparatus (24/25) which is operative to provide inputs to a controller (22), the controller (22) being responsive to inputs from the control apparatus (24/25) when the control system (20) is operating in a first operating mode, to provide output signals to vary the engine (12) speed, and when the control system (20) is operating in a second operating mode, to provide output signals to vary the transmission ratio without changing the engine speed, and a mode selector control (28a) whereby an operator may select the first or second operating mode. This way, engine speed and thus PTO shaft (16) speed may be maintained, while the vehicle speed can change by varying the transmission speed. Methods of operating the control system are also disclosed. <IMAGE> |
