Intelligent control method of engine cooling fan for engineering machinery

Abstract

The invention discloses an intelligent control method of an engine cooling fan for engineering machinery, which is applied to a cooling system of which a fan is hydraulically driven. The cooling system comprises an engine electronic control module and a cooling system controller, wherein a hydraulically driven variable capacity pump is additionally arranged on a power output outlet of an engine; and the cooling system controller acquires a hydraulic oil temperature signal and a pressure switch signal of an air conditioner, and receives an air inlet temperature signal, a diesel oil particle filter regenerating state signal and a cooling liquid temperature signal to serve as control signals of cooling fan rotation speed, through a controller area network (CAN)-bus. If the control signals are abnormal, failure information is sent to a display screen to be displayed through the CAN-bus; and if the control signals are normal, the control signals are exchanged, processed and operated, the cooling system controller outputs a calculated pulse width modulation signal to adjust the current of a proportioning valve which is used for controlling the discharge capacity in the hydraulically driven variable capacity pump, so that the required discharge capacity is obtained, and the cooling fan reaches a required rotation speed.

Description

Technical field [0001] The invention relates to the technical field of intelligent control, in particular to an intelligent control method of an engine cooling fan for engineering machinery. Background technique [0002] The construction machinery industry usually uses cooling fans and radiators to form a cooling system to meet the requirements of the engine and hydraulic components for the operating temperature range, so as to ensure the normal operation of the entire equipment. In a traditional engine-driven fan cooling system, the amount of air intake generated by the fan mainly depends on the engine speed rather than the cooling demand of the whole machine system. Therefore, it is prone to "overheating" or "overcooling" phenomenon, which not only causes The large fluctuation of engine temperature also causes power loss and reduces work efficiency. In recent years, hydraulically driven fans are gradually being used in cooling systems to solve the drawbacks of traditional engi...

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Problems solved by technology

[0003] In view of the above-mentioned existing problems, the object of the present invention is to provide an intelligent control method for engine cooling fans used in engineering machinery, so as to solve the deficiencies in traditional cooling fan control. At the same time, based on the main factors affecting heat dissipation in the whole machine system, Real-time adjustment of cooling fan speed to meet cooling needs

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