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Control method during shutdown of heat dissipation system of hydraulic excavator
The invention discloses a control method during shutdown of a heat dissipation system of a hydraulic excavator, and belongs to the technical field of engine heat dissipation, and the control logic is as follows: after a key switch of the hydraulic excavator is closed, a controller closes a pilot electromagnetic valve, meanwhile, the power of a main pump is reduced to the minimum, control of an accelerator knob and an engine is cut off, and flameout of the engine is controlled in a delayed manner; the engine speed is reduced; and meanwhile, the controller controls the fan to keep running at a high rotating speed, and when the heat dissipation time reaches a preset running stopping time value or the temperature is reduced to a running stopping temperature threshold value, the controller controls the engine to stop. According to the control method, the engine is controlled to delay flameout, the rotating speed of the engine is reduced, the fan is driven to dissipate heat, the heat dissipation efficiency is improved, the temperature of the engine and the cabin is rapidly reduced, it is guaranteed that the engine is flameout when the engine and the cabin are at the low temperature, and the service life of the engine and parts in the cabin is prolonged.
本发明公开了一种液压挖掘机散热系统停机时的控制方法，属于发动机散热技术领域，其控制逻辑为，液压挖掘机钥匙开关关闭后，控制器关闭先导电磁阀，同时降低主泵功率到最小，切断油门旋扭与发动机的控制，并延迟控制发动机熄火，降低发动机转速；同时控制器控制风扇保持较高转速运转，当散热时间达到预设的停止运行时间值或者温度降到停止运行温度阀值后，控制器控制发动机熄火。本发明提供的控制方法，控制发动机延迟熄火，降低发动机转速，驱动风扇散热，提高散热效率，快速降低发动机和机舱温度，保证发动机和机舱处于较低温度时熄火发动机，延长发动机及舱内零部件寿命。
Control method during shutdown of heat dissipation system of hydraulic excavator
The invention discloses a control method during shutdown of a heat dissipation system of a hydraulic excavator, and belongs to the technical field of engine heat dissipation, and the control logic is as follows: after a key switch of the hydraulic excavator is closed, a controller closes a pilot electromagnetic valve, meanwhile, the power of a main pump is reduced to the minimum, control of an accelerator knob and an engine is cut off, and flameout of the engine is controlled in a delayed manner; the engine speed is reduced; and meanwhile, the controller controls the fan to keep running at a high rotating speed, and when the heat dissipation time reaches a preset running stopping time value or the temperature is reduced to a running stopping temperature threshold value, the controller controls the engine to stop. According to the control method, the engine is controlled to delay flameout, the rotating speed of the engine is reduced, the fan is driven to dissipate heat, the heat dissipation efficiency is improved, the temperature of the engine and the cabin is rapidly reduced, it is guaranteed that the engine is flameout when the engine and the cabin are at the low temperature, and the service life of the engine and parts in the cabin is prolonged.
本发明公开了一种液压挖掘机散热系统停机时的控制方法，属于发动机散热技术领域，其控制逻辑为，液压挖掘机钥匙开关关闭后，控制器关闭先导电磁阀，同时降低主泵功率到最小，切断油门旋扭与发动机的控制，并延迟控制发动机熄火，降低发动机转速；同时控制器控制风扇保持较高转速运转，当散热时间达到预设的停止运行时间值或者温度降到停止运行温度阀值后，控制器控制发动机熄火。本发明提供的控制方法，控制发动机延迟熄火，降低发动机转速，驱动风扇散热，提高散热效率，快速降低发动机和机舱温度，保证发动机和机舱处于较低温度时熄火发动机，延长发动机及舱内零部件寿命。
Control method during shutdown of heat dissipation system of hydraulic excavator
一种液压挖掘机散热系统停机时的控制方法
FU GUISHAN (author) / WANG YONG (author) / LIU YONGCAN (author) / HU CHAO (author) / ZHOU YUNJIE (author) / JIANG KE (author)
2022-12-02
Patent
Electronic Resource
Chinese
IPC:
F02N
STARTING OF COMBUSTION ENGINES
,
Anlassen von Brennkraftmaschinen
/
E02F
Baggern
,
DREDGING
/
F01P
Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein
,
COOLING OF MACHINES OR ENGINES IN GENERAL
/
F02D
CONTROLLING COMBUSTION ENGINES
,
Steuern oder Regeln von Brennkraftmaschinen
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