KR970059480A - Engine control device of wheel excavator - Google Patents

Abstract

The present invention relates to an apparatus for controlling the engine speed of a wheel excavator, and more particularly to an engine control apparatus for a wheel excavator in which a controller determines whether an operation state or a parking state is determined and an engine speed control suitable for the situation is performed. In the conventional wheel excavator, the forward and backward operation and the engine speed control are separately performed, so that the mode switch on the operation panel as the engine speed control means and the driving pedal operate independently of each other. However, in the present invention, the pressure sensor is connected between the discharge end of the pedal valve and the controller, and the operation mode switch is connected to the controller so that the state of the operation mode switch is switched to the operation Or in a running state), the engine speed is controlled by a pressure sensor that detects the operating state of the travel pedal valve, thereby facilitating the engine speed control.

Description

Engine control device of wheel excavator

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a control circuit diagram of the present invention,

Figure 3 is a control flow diagram of the present invention.

Claims (2)

(Forward and backward) switching valves (front and rear) in which the conduit connected from the pilot pump 11 is branched by the operating pedal valve 13 operated by the operation of the traveling pedal 1 and operated by the control switch 3 And the discharge end of the traveling direction (forward and backward) switching valves 2 and 2 'is connected to the hydraulic pressure end of the main control valve 2, 2' connected to the pump 12 and the traveling motor 5, (EN) An engine speed control device for a wheel excavator, which is connected to both control ends of a control wheel (4) and to which a control wheel (8) is connected between a control panel (6) and an engine speed control motor (10) The controller 8 is connected to the input end of the switching direction (forward and backward) switching valves 2 and 2 'via the input sensor 7, and a work mode switch 9) are connected to each other. When the key position is turned on, the program of the controller 8 is first initialized and the mode state of the operation mode number position 9 is first determined. If the mode state is the "work" state, the engine speed control motor 10 is set to the low speed And the signal from the input sensor 7 connected to the inlet end of the switching valve (2, 2 ') in the running direction (forward and backward) The engine speed control motor 10 is driven according to the change of the input signal by operating the controller 8 so as to be preferentially inputted. When the mode state of the operation mode switch 9 is the "park" The motor 10 is fixed to the selected mode position (designated engine speed position), and the signal from the input sensor 7 is cut off while the controller 8 is controlled so that the electric signal from the operation panel 6 is input preferentially. Is activated Wherein the engine speed control method of the wheel excavator further comprises: ※ Note: It is disclosed by the contents of the first application.