| 摘要 |
A control system for the main drive and auxiliary drives of a combine in which the main drive propels the vehicle, and the auxiliary drive operates a threshing drum and its conveyor. An engine drives the threshing drum directly, and the conveyor through a coupling, and also drives the pump of a hydrostatic transmission whose hydraulic motor propels the vehicle. A transducer pump, driven from the engine, and a throttle provide hydraulic signals controlling a valve to effect regulation of the transmission pump of the main drive, and to disengage the coupling to reduce the load on the engine. Setting means are provided for limiting the drive torque of the engine to a selected desired value, causing speed reduction and actuation of the control valve.
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