带动泵的 Porsche 发动机原来设计没有空气调节装置,要把它变为有空气调节的特征时,必须把冷凝管安排在发动机部件的外部并通过后轮箱。由于这种管要求抗盐、有机残渣及冷却剂的腐蚀,Porche 工程师考虑用涂复尼龙(Nylon12)的3003铝合金管。此后,其它两个欧洲的汽车制造厂都选择了这种管子,其中一家厂用作发动机的冷却管;另一家也是用作发动机的冷却管和燃油蒸汽回流管以及挡风屏净化器一流体加热器和功率调整流体冷却剂的热交换管。 Porsche engines that propel the pump were originally designed without an air conditioner. To turn it into an air-conditioned feature, the condenser must be routed outside the engine components and through the rear wheelbox. Porche engineers consider 3003 aluminum alloy tubes coated with Nylon 12 because of the corrosion resistance of salts, organic residues and coolants. Since then, the other two European automotive manufacturers have chosen the tube, one of which is used as a cooling tube for the engine; the other is also used as an engine cooling tube and fuel vapor return pipe and a windscreen purifier a fluid heating Heat exchange tubes for fluid and coolant adjustment.