AUTOMATIC TRACTOR CONTROL DEVICE

摘要

PURPOSE:To augment the controllability by detecting the position of the swing movement of a hydraulic position lever which is operated to move a farm working machinery up and down allowing an accelerating device to be controlled automatically to the number of revolution of an engine when the farm working machinery is in an elevated or lowered position. CONSTITUTION:In a tractor engine E, the quantity of injected fuel, and timing of fuel injection are controlled by adjusting levers 11 and 12 respectively which are driven by actuators 30 and 31. And each of the actuators 30 and 31 is also controlled by a control unit 20 in accordance with the engine operating condition. And the above said configuration includes set-up dials 35a and 35b which set the number of revolution when a farm working machinery is elevated and the optimum number of revolution while working, and a select switch 51 which makes a selection of the dial 35a or 35b. And it also includes a position sensor 34 which detects the angle of swing of a hydraulic position lever 3 which controls the up and down swing of a lift arm for elevating the farm working machinery permitting the select switch 51 to be controlled in accordance with its output through the control unit 20.