As a result, improving the design level of engine cooling fans is an important research subject of the engine's cooling system.

因此，改进风扇设计一直是发动机冷却系统的重要研究课题。

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The design principles of engine cooling fans are meeting the cooling demands of a engine, improving the efficiency of fans and reducing the fan noise.

发动机风扇的设计原则是在满足发动机冷却能力的前提下，提高风扇效率，降低风扇噪声。

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With the continuously strict laws and increasing vehicle comfort people pursue, reducing the power consumption and noise of engine cooling fans are the priorities in vehicle design.

随着相关法规的不断严格和人们对车辆舒适性的要求不断提高，降低车辆能耗和噪声一直是现代汽车设计考虑的重点。

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