Engine performance of 75HP Tractor

Title:Thermodynamic analysis of 75HP Tractor

Objective : 1. Achieve the engine performance at rated & intermidiate torque 

                   2. To make 4 cylinder diesel engine  model the with &  without EGR

                   3. To maintan the air fuel ratio & BSFC target

Selected model of Tractor 

Conversion of 6 Cylinder engine to 4 cylinder Engine

Without EGR Model

Calculation for Run the 4 cylinder Engine Model

for do the thermodynamic analysis of any engine its very important to set the target & according to that will get actual result. so, from both result we can calculate the deviation result.

 In the engine specification given the rated speed torque & power , by use of formula calculate the power & torque for both rated & intermidiate speed.

Target Result

From the target value of BSFC & A/F ration. calculate the mass of fuel need to send it in to the each cylinder is calculate.

Actual in Result

Deviation in Result

From below deviation table we can see that  Power & Torque result is with 10 %. so, this result are good & which is acceptable 

Case setup without EGR Model

Engine performance parameter at 2200 &1300 rpm

Engine performance parameter at 2200 &1300 rpm

Nox Emission in first cylinder  

Cylinder Temprature

from above graph its observed that Engine cylinder temprature is high for lower 1300 rpm.

Nox Emission

from above graph its observed that Nox emissio is high for 1300 rpm & its due to higher torque requirment.

With EGR cooler model

in the above model we can see there is add EGR cooler for reduce the Nox emission, so according to that there is connection is given of intake & exhaust manifold to EGR cooler.  

Actual Result for 2200 & 1300rpm

Deviation in Result

Case setup

Engine Performance

Nox Emission in Cylinder first

Nox Emission

NOx Emission Reduction 

if we compare the Nox emission at 2200 rpm for with & without EGR Model

1. Without EGR cooler> 2200 rpm >Nox emission> 1103.17ppm

2. With EGR cooler> 2200rom>Nox emission> 1099 ppm

so, from above figure we can see that by use of EGR cooler there is reduction of Nox emission. 

Overall conclusion

1. Done the thermodynamic analysis of 4 cylinder engine .

2. Obtain the Performance parameter within devaition of 10%

3. EGR cooler is help for reduction of Nox emission.