clc clear //Input data d=[15,60]//Bore in cm N=[1600,400]//Speed in r.p.m respectively q=30//Injection of oil occupies 30 degrees of crank travel in each case pc=30//Compression pressure in kg/cm^2 d=0.001//Delay time in sec rp=5//Rapid combustion period is 5 degree of crank travel pe=60//Compression pressure at the end of rapid compression in kg/cm^2 //Calculations //For small engine It1=(60/N(1))*(q/360)//Injection time in sec pf1=((d/It1)+(rp/pc))*100//Percent fuel //For large engine It2=(60/N(2))*(q/360)//Injection time in sec pf2=((d/It2)+(rp/pc))*100//Percent fuel pr=(pc*(pf2/pf1))//Pressure rise in kg/cm^2 mp=(pc+pr)//Maximum pressure in kg/cm^2 //Output printf('Pressure in the large engine is %3.1f kg/cm^2',mp)