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+clc

+clear

+//Input data

+r=18;//The compression ratio 

+l=6;//The cut off taking place corresponding of the stroke in percent

+sc=2;//The specific heat at constant volume increases in percent

+cv=0.717;//The specific heat at constant volume in kJ/kgK

+R=0.287;//Gas constant in kJ/kgK

+

+//Calculations

+Vs=(r-1);//The ratio of swept volume and volume 2

+B=((l/100)*Vs)+1;//The cut off ratio 

+cp=cv+R;//The specific heat at constant pressure in kJ/kgK

+R1=cp/cv;//The ratio of specific heats 

+n=1-[[[[(1/r)^(R1-1)]*(B^R1-1)]/(R1*(B-1))]];//The efficiency of the diesel cycle 

+dn=[((1-n)/n)*[(R1-1)*((log(r))-(((B^R1)*log(B))/(B^R1-1))+(1/B))]*(sc/100)]*100;//The efficiency decrease in percent

+

+//Output

+printf('The efficiency decreases by %3.3f percent ',dn)