资源描述：
《液力变矩器与发动机共同作用曲线绘制——毛明哲》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、03120902班毛明哲20090601发动机和液力变矩器共同工作输入特性和输出特性曲线图503120902班毛明哲20090601图形如下为了保证图形美观，以下四幅图每个图的部分指标的数量级有所改变。503120902班毛明哲20090601503120902班毛明哲20090601程序如下：第一幅图绘制Ne=[800:100:2200];Ne=[Ne,2500];Me=[2513.3,2657.9,2780,2879.6,2956.8,3011.4,3043.6,3053.3,3040.5,3005.3,2947.4
2、,2867.2,2764.4,2639.2,2491.5,0]fori=1:16Pe(i)=Me(i)*Ne(i)/9549;end;plot(Ne,Pe*5,Ne,Me);title('发动机净外特性曲线');xlabel('转速ne');ylabel('转矩Me/(N*m）功率Pe/kW');第二幅图绘制I=[0,0.387,0.435,0.510,0.595,0.641,0.7,0.757,0.784,0.805,0.853,0.901,0.946];K=[2.54,1.77,1.69,1.55,1.38,1.30
3、,1.20,1.09,1.04,1.00,1.00,1.01,1.03];Xb=[3.05,2.77,2.71,2.62,2.52,2.45,2.34,2.22,2.13,2.04,1.62,1.12,0.62];NN=[0.00,0.69,0.73,0.79,0.82,0.83,0.84,0.83,0.81,0.81,0.85,0.91,0.97];plot(I,K,I,Xb,I,NN*3);gtext('K');gtext('转矩系数');gtext('效率');第三幅图及第四幅图绘制Me=[2513.3,2657.
4、9,2780,2879.6,2956.8,3011.4,3043.6,3053.3,3040.5,3005.3,2947.4,2867.2,2764.4,2639.2,2491.5,0]%发动机的原始转矩Mb1=Me*0.67*0.95;%传递到泵轮的转矩I=[0,0.387,0.435,0.510,0.595,0.641,0.7,0.757,0.784,0.805,0.853,0.901,0.946];%变矩器工况K=[2.54,1.77,1.69,1.55,1.38,1.30,1.20,1.09,1.04,1.00,
5、1.00,1.01,1.03];%变矩比Ne=[800:100:2200];Ne=[Ne,2500];Xb=[3.05,2.77,2.71,2.62,2.52,2.45,2.34,2.22,2.13,2.04,1.62,1.12,0.62];%泵轮转矩系数NN=[0.00,0.69,0.73,0.79,0.82,0.83,0.84,0.83,0.81,0.81,0.85,0.91,0.97];%效率Nb=Ne/0.67;%发动机对应的泵轮转速plot(Nb,Mb1);holdon;forj=1:13fori=1:16Mb
6、2(i)=Xb(j)*860*9.8*Nb(i)*Nb(i)*0.01024*1e-6;%利用公式求不同的变矩器工况对应的泵轮转矩end;%下面求交点503120902班毛明哲20090601fork=2600:3600;%采用步长为1的试凑，范围之前是1到10000经过看图发现交点集中于2600到3600之间。z1=interp1(Nb,Mb1,k);z2=interp1(Nb,Mb2,k);ifabs(z1-z2)<=0.01%两个值之差小于0.01说明近似相等X(j)=k;%XY为交点的横坐标（Nb）Y为交点纵坐标
7、（Mb）；Y(j)=z1;end;end;plot(Nb,Mb2);holdon;end;figure(2);%下面求发动机和液力变矩器共同工作时的输出特性forj=1:13Nt(j)=X(j)*I(j);Mt(j)=K(j)*Y(j);Pt(j)=Mt(j)*Nt(j)/9549;end;plot(Nt,Pt/1000,Nt,Mt,Nt,NN*4000);gtext('-Mt');gtext('Pt');gtext('效率');5
