1、 等速油耗计算方法
由公式![](https://wkrtcs.bdimg.com/rtcs/image?w=94.67&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_0","w":"94.67","h":"36.00","dataType":"gif","c":"word/media/image1.gif"})
P：发动机功率（kw）、b：比油耗（g/（kw·h））、ν：车速（km/h）、ρ：燃油密度（kg/L）、g：9.8N/kg
发动机功率![](https://wkrtcs.bdimg.com/rtcs/image?w=110.67&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_3","w":"110.67","h":"36.00","dataType":"gif","c":"word/media/image2.gif"})
T：发动机扭矩、传动系统总效率、n：发动机转速、F：行驶阻力（N）由滑行曲线查得
比油耗![](https://wkrtcs.bdimg.com/rtcs/image?w=101.33&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_3","w":"101.33","h":"36.00","dataType":"gif","c":"word/media/image4.gif"})
L：发动机燃油流速（kg/h）可通过转速n与扭矩T在Map图中查得
![](https://wkrtcs.bdimg.com/rtcs/image?w=140.00&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_0","w":"140.00","h":"36.00","dataType":"gif","c":"word/media/image5.gif"})
要计算某个车速下的油耗Q，只需计算此车速下的L，计算L需要算得发动机转速n与扭矩T
发动机转速与汽车行驶速度之间的关系式为![](https://wkrtcs.bdimg.com/rtcs/image?w=104.00&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_0","w":"104.00","h":"36.00","dataType":"gif","c":"word/media/image6.gif"})
可根据车速计算转速n
扭矩![](https://wkrtcs.bdimg.com/rtcs/image?w=74.67&md5sum=56a8dbaf1fc2e44f3d9ce27e2a8c9fe3&sign=385fe7e10b&rtcs_flag=2&rtcs_ver=3.1&l=webapp&bucketNum=51&ipr={"t":"img","r":"r_3","w":"74.67","h":"36.00","dataType":"gif","c":"word/media/image7.gif"})
或者
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