| The emission standards for commercial vehicles have been tightened worldwide and mandatory emission limits established. One thing necessary for achieving these values is an optimal combustion temperature for the engine, which in turn requires efficient cooling management system. This paper introduces a new electronic hydraulic driving fan cooling system to solve the problem of overheating and overcooling in the construction machinery. The task of an electronic hydraulic fan drive is to use controlled air movement to carry off the dissipated heat from the combustion engine arriving at the radiator. The drive serves to ensure optimal engine and combustion temperature. Intelligently controlled fan drive systems thereby help to maintain the legal emissions directives while saving energy. Controlled by highly reliable sensors, they provide cooling based on the measured temperature to consistently reduce operating costs. No more or less cooling than needed in construction machinery applications. It will play a significant role in modern engine systems. This paper surveys the development of fan drive cooling systems. On the basis of the survey, the design of an electronic hydraulic driving fan cooling system is discussed, and the selection of the main system components is presented. The fan speed control is implemented based on BODAS controller and corresponding AFC control package. A comparison between the designed cooling system and traditional one is made by a test, and test result showed that the energy consumption is reduced obviously, so the operation cost can be saved. |
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