Overheating Prevention System for Hydraulic Units

Abstract

The invention provides an overheating prevention system of a hydraulic device. The overheating prevention system comprises a hydraulic pump which drives a driver to drive; an engine which is connected with the hydraulic pump and enables the hydraulic pump to work; a pump controller which controls the hydraulic pump; an electromagnetic proportion pressure-reducing valve which is connected with the pump controller and controls the maximum set torque of the hydraulic pump; a temperature sensor which senses the temperature of a cooling liquid cooling the heat produced in the engine and the temperature of working oil enabling the driver to work; and a control portion which controls at least one of the engine and the electromagnetic proportion pressure-reducing valve on the basis of the difference between information about the temperature measured by the temperature sensor and the reference temperature set in advance.

Description

technical field [0001] The present invention relates to a system for preventing over-heating of Hydraulic assembly, and more particularly, to a system intended to prevent overheating of a hydraulic device employed in a construction machine such as an excavator. Background technique [0002] In general, a construction machine such as an excavator is equipped with a plurality of drives for running or driving various work implements. The plurality of actuators are driven by hydraulic fluid discharged from a variable displacement hydraulic pump driven by the engine. [0003] If an excavator is taken as an example for a more specific description, pressure sensors are equipped in the hydraulic control lines of the joystick of the excavator and various driving operation devices. When the user operates the joystick and various driving operating devices, the pressure sensor recognizes the signal generated by the action and sends it to the control unit. The control unit uses the valu...

AI Technical Summary

Problems solved by technology

[0005] After overheating occurs, only the measure control is executed, and in order to protect the engine and equipment, the engine speed and pump torque are reduced to the minimum value, so the operation cannot be carried out until the overheating temperature condition is relieved

In other words, in the work area, it is impossible to deal with the performance of the cooling system in advance due to the performance of the cooling system, pollution, etc.

[0006] In a very small number of operations, it is impossible to cope with overheating due to overload operations exceeding the design value of the cooling system and overheating due to environmental conditions in some extreme areas, or there are methods to protect cooling performance to meet the conditions of some operating areas, but because of The problem of low fuel efficiency due to rising costs and rising energy consumption

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