Excavator engine high-temperature segmentation protection method and device

Abstract

The invention discloses an excavator engine high-temperature segmentation protection method and device. Temperature rise gradient control and high temperature emergency control are included, a temperature sensor transmits an engine water temperature signal to a controller, when the water temperature is higher than T1, temperature rise gradient control is started, the controller firstly conducts water temperature rise gradient calculation, if the temperature rise gradient rises faster, the output power of a heat dissipation system is increased, and the condition that the power of the heat dissipation system is increased after the temperature rises to a certain value is replaced; and when the water temperature is higher than T2, high temperature emergency control is started, the controller sends a signal, the engine rotating speed is reduced to the minimum speed or idle speed, the output power of a main pump of an excavator is reduced to be minimum, and meanwhile an alarm signal is givenout. By means of the excavator engine high-temperature segmentation protection method and device, by monitoring the engine water temperature rise gradient signal, high-temperature protection of an engine can be can performed in advance, and the probability of high-temperature damage caused by an emergency event of the engine is reduced.

Description

technical field [0001] The invention belongs to the technical field of high temperature protection of engines, and in particular relates to a method and a device for high temperature segmental protection of excavator engines. Background technique [0002] Overheating of the engine can easily lead to failures such as pulling the cylinder and endanger the engine. The engine configured on the excavator is generally equipped with a cooling system to make the engine work within the normal temperature range. However, due to the complex working conditions of the excavator, the heat dissipation system may be damaged by the impact of the splashing gravel, resulting in abnormal heat dissipation system, the engine water temperature rises rapidly, and eventually exceeds the normal working temperature range. This sudden abnormality needs to be dealt with in time to protect engine. [0003] Some existing technical methods have been able to adapt to the high temperature of the engine, Ch...

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Problems solved by technology

However, due to the complex working conditions of the excavator, the heat dissipation system may be damaged by the impact of flying gravel, resulting in an abnormal heat dissipation system, the engine water temperature rises rapidly, and eventually exceeds the normal operating temperature range. It is necessary to deal with such sudden abnormalities in time to protect engine

[0003] Some existing technical methods can adapt to the high temperature of the engine. Chinese patent application number CN102061719B, patent name: an excavator overheat protection method, Chinese patent application number CN103628517B, patent name: excavator safety control system and method, Chinese patent application number CN202273263U, patent name: automatic warm-up and overheating protection control device, Chinese patent application number CN1178008C, patent name: construction machinery control device, Chinese patent application number CN201320249607.4, patent name: excavator cooling system overheating protection Devices, such as the above patents, have taken feasible measures for engine high temperature protection. When the engine water temperature rises, the heat dissipation capacity of the cooling system can be increased. If the engine water temperature is overheated, the engine speed and power can be reduced, but these methods are not given. The treatment method for the sudden overheating of the engine water temperature, while the general engine overheating treatment method may take too long. When these methods work, the engine may have been irreversibly damaged

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