总体设计计算4座客货两用车

,,汽车总体设计相关参数的设计计算肖飞平,,,,,,标准,,,,

初选参数,,,,,,,,标准人m(kg),65,,,

几何参数,外廓尺寸,,,,货箱尺寸,,,最高转速时β=P/N,,,,

,长,3860,,,长,1400,,β,1.05,,汽油β,1.0-1.1

,宽,1400,,,宽,1375,,,,,柴油机β,近于1

,高,1815,,,高,430,,总重量N,16072,,,

,轴距,2500,,,前悬,480,,滚动阻力系数f,0.011,,f一般沥青混凝土,0.018-0.02

,前轮距,1280,,,后悬,880,,4-6档变速器ηt,95%,,,

,后轮距,1290,,,车头长,2460,,单级主减速器ηt,96%,,,

,,,,,,,,传动轴和万向节ηt,98%,,,

,,,,,,,,空气阻力系数CD,0.6,,乘用车,0.3-0.35

,,,,,,,,,,,货车,0.8-1

质量参数,整备质量,880,,,,,,,,,客车,0.6-0.7

,,,,,,,,迎风面积m2,2.1,,,

,载人数,4,质量,260,,,,附着系数Φ,0.5,,一般值,0.5-0.6

,载质量,500,,,,,,,,,,

,最大装载质量,760,,,,,,系数δ1,0.04,,一般,0.04-0.06

,总质量,1640,,,,,,系数δ2,0.03,,一般,0.03-0.05

,,,,,,,,滚动阻力系数fr,0.014,,乘用车,0.0165

性能参数,最小转弯半径<=,9.5,,最高车速,95,,,,,,货车,0.014

,最大爬坡度,30%,,爬坡角度,16.69924452,,,,,,矿用自卸,0.03

,,,,,,,,转矩适应性系数,1.1,,一般,1.1-1.3

轮胎参数,型号,155R12LT,,,,,,,,,,

,负荷指数,77%,,许用轮辋,4.00b/5.00b,,断面馆宽度,157,,,,

,外直径,553,,负荷静半径,249,,滚动半径,268,,,,

,最大断面宽度,163,,负荷能力,412,,充气压,240,,,,

发动机参数,型号(汽油机),JL465Q1,,,,,,,,,,

,最大转矩,72,,最大功率,32.5,,,,,,,

,最高转速,5500,,,,,,,,,,

,Tmax对应转速,4500,,排量,0.97,,,,,,,

,校核Pmax,22.51829337,,Tmax,52.56220038,,,,,,,

,,,,,,,,,,,,,

,,,,,,,,,,,,,

传动效率,ηt,89.37600%,,,,,,,,,,

计算参数,主减速比i0,6.141925263,,,,,,,,,,

,修正后i0,5.571,,,,,,,,,,

变速器参数,,,,,,,,,,,,

,ig4,1,,档位数,4,,,,,,,

,ig1,3.613553991,,档位分配比q,1.534539891,,,,,,,

,ig2,2.354812678,,ig3,1.534539891,,,,,,,

,修正后ig1,3.504,,修正后ig2,2.483,,,,,,,

,修正后ig3,1.56,,修正后ig4,1,,,,,,,

发动机与动力性,,,,,,,,,,,,

,,,,,,,,,,,,,

,转速,转矩Mn/m,功率pkw,油耗g/kw·h,,,,,,,,

,2500,40,6,143.3823529,,,,,,,,

,2800,46,9,142,,,,,,,,

,3100,53,12,140.5,,,,,,,,

,3400,59,16,139.2,,,,,,,,

,3700,65,19,138,,,,,,,,

,4000,69,22.5,137.5,,,,,,,,

,4300,71,25,137.2,,,,,,,,

,4600,72,27,137.0098039,,,,,,,,

,4900,67,28,137.6,,,,,,,,

,5200,59,29,141.5,,,,,,,,

,5500,48,29,149.1176471,,,,,,,,

,,,,,,,,,,,,,

,,,,,,,,,,,,,

,,各档车速,,,,,,,,,,

,转速,1档,2档,3档,4档,,,,,,,

,2500,12.93954177,18.26023132,29.06420152,45.34015437,,,,,,,

,2800,14.49228679,20.45145908,32.5519057,50.7809729,,,,,,,

,3100,16.0450318,22.64268684,36.03960988,56.22179142,,,,,,,

,3400,17.59777681,24.8339146,39.52731407,61.66260994,,,,,,,

,3700,19.15052182,27.02514236,43.01501825,67.10342847,,,,,,,

,4000,20.70326684,29.21637011,46.50272243,72.54424699,,,,,,,

,4300,22.25601185,31.40759787,49.99042661,77.98506552,,,,,,,

,4600,23.80875686,33.59882563,53.4781308,83.42588404,,,,,,,

,4900,25.36150187,35.79005339,56.96583498,88.86670257,,,,,,,

,5200,26.91424689,37.98128115,60.45353916,94.30752109,,,,,,,

,5500,28.4669919,40.17250891,63.94124334,99.74833962,,,,,,,

,,,,,,,,,,,,,

,,各档驱动力Ft,,,,,,,,,,

,转速,1档,2档,3档,4档,,,,,,,

,2500,2604.014315,1845.253294,1159.321441,743.1547701,,,,,,,

,2800,2994.616462,2122.041288,1333.219658,854.6279857,,,,,,,

,3100,3450.318967,2444.960615,1536.10091,984.6800704,,,,,,,

,3400,3840.921114,2721.748609,1709.999126,1096.153286,,,,,,,

,3700,4231.523261,2998.536603,1883.897342,1207.626501,,,,,,,

,4000,4491.924693,3183.061933,1999.829486,1281.941979,,,,,,,

,4300,4622.125408,3275.324597,2057.795559,1319.099717,,,,,,,

,4600,4687.225766,3321.45593,2086.778595,1337.678586,,,,,,,

,4900,4361.723977,3090.799268,1941.863414,1244.78424,,,,,,,

,5200,3840.921114,2721.748609,1709.999126,1096.153286,,,,,,,

,5500,3124.817178,2214.303953,1391.18573,891.7857242,,,,,,,

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,,,,,,,,,,,,,

,,,,,,`,,,,,,

附着条件计算,附着力FΦ,23625.84,,,,,,,,,,

,Ftmax,4687.225766,,,,,,,,,,

,空气阻力Fw,,,,,,,,,,,

,转速,1档,2档,3档,4档,,,,,,,

,2500,9.927717365,19.77079625,50.08739014,121.8926727,,,,,,,

,2800,12.45332866,24.80048682,62.8296222,152.9021686,,,,,,,

,3100,15.26485822,30.39957632,77.01437109,187.4221735,,,,,,,

,3400,18.36230604,36.56806475,92.64163681,225.4526873,,,,,,,

,3700,21.74567212,43.30595211,109.7114194,266.9937102,,,,,,,

,4000,25.41495646,50.61323841,128.2237188,312.045242,,,,,,,

,4300,29.37015905,58.48992363,148.178535,360.6072828,,,,,,,

,4600,33.61127991,66.93600779,169.5758681,412.6798325,,,,,,,

,4900,38.13831903,75.95149088,192.415718,468.2628913,,,,,,,

,5200,42.95127641,85.53637291,216.6980847,527.356459,,,,,,,

,5500,48.05015205,95.69065386,242.4229683,589.9605357,,,,,,,

,,,,,,,,,,,,,

,,滚动阻力Ff,,,,,,,,,,

,,1档,,2档,,3档,,4档,,,,

,转速,滚阻系数f,滚动阻力Ff,滚阻系数f,滚动阻力Ff,滚阻系数f,滚动阻力Ff,滚阻系数f,滚动阻力Ff,,,

,2500,0.012793954,205.6244315,0.013326023,214.1758438,0.01440642,231.5399847,0.016034015,257.6986961,,,

,2800,0.012949229,208.1200033,0.013545146,217.697585,0.014755191,237.1454228,0.016578097,266.4431796,,,

,3100,0.013104503,210.6155751,0.013764269,221.2193263,0.015103961,242.750861,0.017122179,275.1876632,,,

,3400,0.013259778,213.1111469,0.013983391,224.7410675,0.015452731,248.3562992,0.017666261,283.9321467,,,

,3700,0.013415052,215.6067187,0.014202514,228.2628088,0.015801502,253.9617373,0.018210343,292.6766302,,,

,4000,0.013570327,218.1022905,0.014421637,231.78455,0.016150272,259.5671755,0.018754425,301.4211138,,,

,4300,0.013725601,220.5978622,0.01464076,235.3062913,0.016499043,265.1726137,0.019298507,310.1655973,,,

,4600,0.013880876,223.093434,0.014859883,238.8280326,0.016847813,270.7780518,0.019842588,318.9100808,,,

,4900,0.01403615,225.5890058,0.015079005,242.3497738,0.017196583,276.38349,0.02038667,327.6545644,,,

,5200,0.014191425,228.0845776,0.015298128,245.8715151,0.017545354,281.9889281,0.020930752,336.3990479,,,

,5500,0.014346699,230.5801494,0.015517251,249.3932563,0.017894124,287.5943663,0.021474834,345.1435314,,,

,,,,,,,`,,,,,

,动力因数的计算,,,,,,,,,,,

,转速,1档,2档,3档,4档,,,,,,,

,2500,0.161404094,0.113581539,0.069016554,0.038654934,,,,,,,

,2800,0.18555022,0.130490344,0.079043681,0.043661387,`,,,,,,

,3100,0.213729101,0.150234012,0.090784379,0.049605394,,,,,,,

,3400,0.237839647,0.16707196,0.100631999,0.054175,,,,,,,

,3700,0.261932404,0.183874481,0.110389866,0.058526182,,,,,,,

,4000,0.27790628,0.194900989,0.116451329,0.060346985,`,,,,,,

,4300,0.285761277,0.200151485,0.11881639,0.059637409,,,,,,,

,4600,0.28954794,0.202496262,0.119288373,0.057553432,,,,,,,

,4900,0.269013543,0.187583859,0.108850653,0.048315166,,,,,,,

,5200,0.236309721,0.164025152,0.092913206,0.035390544,,,,,,,

,5500,0.191436475,0.131820141,0.07147603,0.018779566,,,,,,,

,D0max,0.28954794,0.202496262,0.119288373,0.060346985,,,,,,,

最大爬坡度a,1档,1档,2档,3档,4档,,,,,,,

,D0max,0.28954794,0.202496262,0.119288373,0.060346985,,,,,,,

,f,0.013880876,0.014859883,0.016499043,0.018754425,,,,,,,

,αmax(º),16.03395999,10.83031816,5.904857927,2.384697204,,,,,,,

加速度计算,回转质量换算系数,,,,,,,,,,,

,档位,1档,2档,3档,4档,,,,,,,

,δ,1.52112064,1.27661156,1.127344,1.03,,,,,,,

,,加速度,,,,,,,,,,

,转速,1档,2档,3档,4档,,,,,,,

,2500,0.957438438,0.769618644,0.474725824,0.215228156,,,,,,,

,2800,1.112002341,0.897738179,0.558859765,0.257685672,,,,,,,

,3100,1.292547748,1.04761975,0.65788978,0.3090636,,,,,,,

,3400,1.446882425,1.175195354,0.740463269,0.3473647,,,,,,,

,3700,1.601102489,1.302498992,0.822256531,0.383587592,,,,,,,

,4000,1.703015709,1.385462661,0.871916967,0.395735036,,,,,,,

,4300,1.752622084,1.424086361,0.889444576,0.383807031,,,,,,,

,4600,1.776017731,1.440404094,0.890515659,0.358802198,,,,,,,

,4900,1.64272207,1.324245852,0.796748714,0.265727436,,,,,,,

,5200,1.431023449,1.141713639,0.655172642,0.137578605,,,,,,,

,5500,1.140921868,0.892807456,0.465787444,-0.025644295,,,,,,,

,,,,,,,,,,,,,

,,,,,,,,,,,,,

,转速,1档1/j,2档1/j,1档2/j,1档2/j,,,,,,,

,2500,1.044453576,1.299344822,2.106479046,4.646232249,,,,,,,

,2800,0.899278682,1.113910518,1.789357658,3.880696942,,,,,,,

,3100,0.77366581,0.954544815,1.520011452,3.235579986,,,,,,,

,3400,0.691141162,0.850922357,1.350505882,2.878818714,,,,,,,

,3700,0.624569637,0.767754913,1.216165469,2.606966492,,,,,,,

,4000,0.587193644,0.721780549,1.1468982,2.526943306,,,,,,,

,4300,0.570573662,0.702204604,1.124297148,2.605475979,,,,,,,

,4600,0.563057442,0.694249623,1.122944881,2.787050931,,,,,,,

,4900,0.608745702,0.755146787,1.255100865,3.76325462,,,,,,,

,5200,0.698800569,0.875876372,1.526315257,7.268572043,,,,,,,

,5500,0.876484208,1.120062331,2.146902012,-38.99502812,,,,,,,

,,,,,,,,,,,,,

加速时间,图解法T,47.2,,,,,,,,,,

加速阻力,,,,,,,,,,,,

,转速,1档FjN,2档FjN,1档FjN,1档FjN,,,,,,,

,2500,2404.164156,2020.236234,1785.856455,1695.814961,,,,,,,

,2800,2792.279968,2346.37271,2074.155873,1969.578547,,,,,,,

,3100,3245.636317,2727.331273,2410.917138,2289.360571,,,,,,,

,3400,3633.176533,3052.984072,2698.788993,2562.718151,,,,,,,

,3700,4020.428951,3378.395033,2986.447067,2835.872729,,,,,,,

,4000,4276.336903,3593.436305,3176.540105,3016.381424,,,,,,,

,4300,4400.900389,3698.107887,3269.068107,3104.244235,,,,,,,

,4600,4459.647743,3747.473706,3312.7067,3145.682604,,,,,,,

,4900,4124.937294,3466.214136,3064.077748,2909.58933,,,,,,,

,5200,3593.354045,3019.520952,2669.208131,2534.628733,,,,,,,

,5500,2864.897995,2407.394154,2128.097852,2020.800813,