The present work concerns an experimental study of the aerodynamic drag on a simplified vehicle body in relation to the underhood architecture, especially the engine block and cooling module positions. To proceed, measurements are carried out in wind tunnel for different geometric configurations. The simplified body includes a real cooling module and a simplified engine block. The measured coefficients concern the aerodynamic drag, the cooling drag and the lift in relation. It was shown that the aerodynamic drag can be reduced up to 1.4 % when the spacing in the vehicle length between the engine block and cooling module is well regulated. According to the results obtained, it was noticed that new configurations could reduce the fuel consumption by up to 0.177 L/100 kms.

中文翻译：

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引擎盖架构对气动阻力的影响—提出减少燃油消耗新概念的建议

本工作涉及与发动机罩结构有关的简化车身上的空气阻力的实验研究，尤其是发动机缸体和冷却模块的位置。为了继续进行，在风洞中对不同的几何形状进行测量。简化的车身包括一个真正的冷却模块和一个简化的发动机缸体。测得的系数与空气阻力，冷却阻力和升力有关。结果表明，如果很好地调节发动机缸体和冷却模块之间的车距，则空气阻力可以减少1.4％。根据获得的结果，注意到新的配置可以减少多达0.177 L / 100 kms的燃料消耗。