Cooling fan control device and method

Abstract

The invention provides a cooling fan control device, which comprises an engine coolant temperature probe, a torque converter oil temperature sensor, a hydraulic oil temperature sensor, an electric control unit, a forced cooling switching input, a flow regulator, a driving device and a fan. A monitoring sensor and a setting amount signal input are connected with the input end of the electric control unit. The output port of the electric control unit is connected with the flow regulator. The flow regulator is connected with the driving device. The driving device is connected with the fan. The invention provides a control algorithm of the device. According to the method, relevant system signal or other incoming signal is collected and processed; the control signal is output and acts on the flow regulator; the driving power output to the driving device is regulated through changing the duty ratio of the output pulse-width signal, thus regulating the rotation speed of the fan. The system is effectively ensured to work within the optimal temperature range all along; the service life of the system or components is improved; energy consumption is reduced; work efficiency is improved; and noise resulting from the fan is reduced.

Description

Technical field [0001] The invention relates to the field of vehicle fan control, in particular to a cooling fan control device and a control method thereof for adjusting the rotation speed of the cooling fan by changing the driving capability of the cooling fan. Background technique [0002] Vehicles and construction machinery will generate a lot of heat during their work. Due to changes in the working environment and working conditions, the heat production will also change accordingly. In order to maintain the normal operation of the equipment, various coolers or heat exchangers are usually used, and the heat is dissipated into the environment by forced cooling by a cooling fan. So as to keep the devices within the working range of normal temperature. In traditional cooling systems, the cooling fan is often installed on the engine, and the change of the fan speed is correspondingly changed by the change of the engine speed. The cooling effect is directly related to the engine s...

AI Technical Summary

Problems solved by technology

In the traditional cooling system, the cooling fan is usually installed on the engine. The change of the fan speed is corresponding to the change of the engine speed. The cooling effect is directly related to the engine speed. Therefore, the cooling system cannot meet all the working conditions of the system. Heat exchange requirements often cause overheating or overcooling of various system equipment that generates heat and needs to be cooled, such as engines of vehicles and construction machinery, hydraulic operating systems, hydraulic drive systems, and booster systems

Especially when the engine is under the condition of low speed and high working torque, due to the slow speed of the cooling fan and poor cooling effect, it often causes overheating; when the engine is idle and the ambient temperature is low, it will cause overcooling

It cannot guarantee that the system will always work at the optimal working temperature, resulting in problems such as shortening the life of the system or components, increasing energy consumption, and reducing work efficiency.

In addition, when the engine speed is high, the fan speed is also high, resulting in greater noise caused by the fan.

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