Patent ID: 7379806
Filing Date: 2008-05-27
Classification: B62D,E02F

Abstract:
1. A method for controlling travel of construction heavy equipment with joysticks, in which the construction heavy equipment has boom and arm joysticks outputting first manipulation signals according to quantities of manipulation in order to drive a boom and an arm, left and right acceleration pedals outputting second manipulation signals according to quantities of manipulation in order to drive left and right traveling units, a plurality of control valves controlling hydraulic fluid supplied to each of the boom, the arm and the left and right traveling units, and a plurality of electronic proportional valves operated by control signals outputted from a controller to control each of the control valves, the method comprising the steps of: inputting a joystick travel function selection signal, the first manipulation signals generated by the joysticks and the second manipulation signals generated by the acceleration pedals into the controller; determining whether a joystick travel function is selected or released from the joystick travel function selection signal; when the joystick travel function is selected, performing long-distance travel by preventing the control signal according to the second manipulation signals of the acceleration pedals from being outputted, by outputting the control signal according to the first manipulation signal of the arm joystick to the electronic proportional valves connected to the control valve for controlling the left traveling motor and by outputting the control signal according to the first manipulation signal of the boom joystick to the electronic proportional valves connected to the control valve for controlling the right traveling motor; and when the joystick travel function is released, performing a work by outputting the control signal according to the first manipulation signal of the arm joystick to the electronic proportional valves connected to the control valve for controlling an arm cylinder, by outputting the control signal according to the first manipulation signal of the boom joystick to the electronic proportional valves connected to the control valve for controlling an boom cylinder and by outputting the control signal according to the second manipulation signals of the acceleration pedals to the electronic proportional valves for the traveling motors.