Vehicle control system

Abstract

This invention relates to improved control systems for vehicles which require power to prepare the vehicle itself and to drive auxiliary equipment mounted on the vehicle. A land vehicle has hydrostatic transmission to drive at least one roadwheel to propel the vehicle, an engine connected to drive both the hydrostatic transmission and auxiliary equipment mounted on the vehicle, a hydraulic pressure supply to the transmission and a speed control for the vehicle. The speed control controls the pressure supply of the transmission and the speed of the engine whereby the engine speed is restricted to a preset limit when the auxiliary equipment is operating and the speed of the engine can be increased when the auxiliary equipment is inert and the vehicle in transit. This results in a more efficient and better controllable vehicle, particularly working vehicles such as roadsweepers, agricultural and construction vehicles.

Dependencies are inferred from the claim text.