CAR SPEED CONTROL STRUCTURE OF A WORK CAR WHICH CHANGES GEAR RATIO, AN INFORMATION MARK STRUCTURE, AND A CAR SPEED OPERATION STRUCTURE

摘要

PURPOSE: A car speed control structure, an information mark structure, and a car speed operation structure are provided to improve operating accuracy by supplementing the change of power transmission efficiency in a hydrostatic stepless transmission.;CONSTITUTION: A gear ratio establishing unit establishes gear ratio of a hydrostatic stepless transmission(9). A car speed detection unit detects car speed. A gear ratio changing unit changes the gear ratio of the hydrostatic stepless transmission. An operating position detection unit detects operating position of a variable speed operation port(20). An engine(3) is loaded on the front portion of a tractor. An engine rev count detection unit the rev count of the engine. A car speed control unit control operation of the gear ratio changing unit.;COPYRIGHT KIPO 2013