Assignment No 2-I C Engine calibration using GT-Power

Title: I.C Engine calibration using GT-Power

Objective: 1.Run the case at 1800 rpm and list down important parameters

air flow rate, BMEP, BSFC, In-cylinder pressure

2. Increase the power output at 3600 rpm by 10%

Theory

In this assignment calibration done on single cylinder 4 stroke SI Engine having the following default setting of cylinder

Case I: Run the case at 1800 rpm

setup for single cylinder SI Engine

Output parameters

1.Air-flow rate= 24.64kg/h

2.BMEP=9.47 bar

3.BSFC=239.17 g/kw-hr

4.Maximum presuure in the cylinder=48.89bar

CASE-II: Run the case at 3600 rpm & Increase the Brake Power(BP) by 10%

Increase the brake power is challanging task, so brake power can be increase by increase the Bore diameter, Stroke length, Compression ratio.

1.Increase BP by Bore Diameter

From above table we can see that increase the bore diameter by 4.2mm there is increasse the Brake power 10.67%

Increase BP= ((18.46-16.68)/16.68)*100 =10.67%

2.Increase BP by Stroke length

From above table we can see that increase the stroke length by 9mm there is increase the Brake power 10.19%

Increase BP= ((18.38-16.68)/16.68)*100 =10.19%

3.Increase BP by Compression Ratio

From above table we can see that increase the Compression ratio by 7 there is increase the Brake power 10.61%

Increase BP= ((18.45-16.68)/16.68)*100 =10.61%

Overall conclusion

1.By increase the bore diameter by 4.2mm there is increasse the Brake power 10.67%

2.By increase the stroke length by 9mm there is increase the Brake power 10.19%

3. By increase the Compression ratio by 7 there is increase the Brake power 10.61%, but generally compression ratio is between 9-12 so, here is use up to 16.5 which is not desirable & not possible practically