汽车理论实习-本田雅阁

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1、汽车理论实习报告《汽车理论》实习报告学院：机械与车辆工程学院专业：车辆工程姓名：刘斌学号：080403031012指导教师周靖时间2011.5.9-13中国·珠海12汽车理论实习报告汽车理论实习————本田雅阁2.4EXLNavi一．动力性分析1．驱动力图根据雅阁发动机的外特性图可得出各转速下所对应的功率n(r/min)Pe(kw)10020最低稳定转速点20004025005530007035008140009445001085000114550012112汽车理论实习报告60001296500132最高功率点（最高转速点）2．雅阁2.4EXLNavi的主要参数尺

2、寸参数4960*1845*1480最小离地间隙115（mm）整车装备质量1547（kg）轮胎225/50R17一档传动比3.455(38:11)二档传动比1.944(35:18)三档传动比1.286(36:28)四档传动比0.969(31:32)五档传动比0.800(28:35) 主减速比3.875空气阻力系数0.343.根据雅阁2.4EXLNavi的轮胎规格225/50R17计算半径r=（22555%2+1725.4）/2»340mm=0.34m取传动系机械效率为=0.912汽车理论实习报告计算出在一至五档各档位中在不同转速下的汽车行驶速度和驱动力：一档二档n(r

3、/min)Pe(kw)(km/h)(N)(km/h)(N)1000209.5741566746.90617.01583796.23320004019.148316746.90634.031593796.23325005523.935397421.59742.539494175.85730007028.722477871.39151.047394428.9387335008133.509557807.13459.555294392.7841340009438.296627927.61568.063194460.574450010843.08378096.28776.5

4、71094555.47983500011447.870787691.47385.078994327.70584550012152.657867421.59793.586884175.85651600012957.444947252.924102.09484080.95068650013262.232026850.705110.60273854.63678三档四档(km/h)(N)(km/h)(N)10002025.722172511.29434.136961892.2582120004051.444342511.29468.273911892.25821250055

5、64.305422762.42485.342392081.4840330007077.166512929.843102.41092207.6345835008190.027592905.926119.47932189.61307400094102.88872950.771136.54782223.40344500108115.74983013.553153.61632270.709865000114128.61082862.875170.68482157.174365500121141.47192762.424187.75332081.484036000129154

6、.3332699.641204.82172034.177586500132167.19412549.929221.89021921.36988五档(km/h)(N)10002041.348391562.23620004082.696771562.236250050103.3711718.459300077124.04521822.609350081144.71941807.73400094165.39351835.6274500112186.06771874.6835000118206.74191780.94912汽车理论实习报告5500121227.4161171

7、8.4596000129248.09031679.4046500132268.76451586.274.根据以上不同档位下速度与驱动力之间的关系绘制驱动力图：二、驱动力——行驶阻力平衡图在水平路面上，滚动阻力Ff=Gf轿车轮胎的滚动阻力系数可估算：，取f0=0.014已知质量m=1547kg，故重力G=mg=1547*9.8=15160.6N所以Ff=Gf=15160.6×0.014×(1+/19400)=212.2484(1+/19400)空气阻力：已知CD=0.34，计算A≈1845×(1480−115)=2027025=2.02712汽车理论实习报告所以得