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现代提高机车柴油机功率的努力,由于受到尺寸和重量的限制,在机车动力和辅助设备的布置方面遇到极大的困难。尤其是占车体容积15～20%的冷却装置更是如此。随着机车功率的提高,冷却装置尺寸的增加幅度,比发动机尺寸的增加幅度更大。例如,10Д100型和2A-5Д49型高强化柴油机的功率比它们的原型2Д100和1A-5Д49型柴油机提高了1000马力,其本身尺寸并没有多大改变,但冷却装置的工作面却分别增加了35%和7%。为了留出布置大功率柴油一发电机组的位置,在许多国外内燃机车和苏联国产第一批七台TЭП70。型内燃机车上采用了组合式的顶置散热器。这种在机车外部组装的冷却器,由于采用部件互换修理法,所以可以缩短机车修理中的停留时间。但是,这种型式仍有一些重要的缺点致使科洛姆纳机车制造厂不得不放弃顶置式散热器,从TЭП70型第八号车开始采用拱型冷却风道,从而使车体长度增加了1230毫
Modern efforts to increase the power of locomotive diesel engines have encountered great difficulties in the layout of locomotive power and auxiliary equipment due to size and weight constraints. This is especially true for cooling devices, which account for 15-20% of the body volume. As locomotive power increases, the size of the cooling device increases more than the size of the engine. For example, the 10Д 100 and 2A-5Д 49 high-strength diesel engines have increased their horsepower by 1000 horsepower over their prototype 2Д 100 and 1A-5Д 49 diesel engines without any significant changes in their size, but their working surfaces have increased by 35% And 7%. In order to set aside a location for the installation of a high-power diesel generator set, in many foreign diesel locomotives and the Soviet Union made the first batch of seven TЭ 67. Diesel locomotive with a combination of overhead radiator. This kind of cooler, which is assembled outside the locomotive, can shorten the residence time in locomotive repair due to the component interchange repair method. However, there are still some important drawbacks of this type that led to the fact that the Kolomna Locomotive Works had to give up the roof-mounted radiator, starting with the Arcuate cooling duct from the TÜП70 Type 8, which increased the body length by 1230 Milli