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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 …
Dipakv Virkarwe
updated on 10 May 2020
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
![\"r\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589090587.png\")
Case I: Run the case at 1800 rpm
setup for single cylinder SI Engine
![\"R\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589089782.png\")
Output parameters
![\"o\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589090777.png\")
![\"r\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589090895.png\")
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
![\"b\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589091525.png\")
![\"b\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589091559.png\")
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
![\"b\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589093000.png\")
![\"b\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589091724.png\")
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
![\"s\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589091890.png\")
![\"v\"](\"//edxengine-live-courses-files.s3.amazonaws.com/1589091958.png\")
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
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