Week 2 : Basic Calibration of Single cylinder SI-Engine
Week 2 : Basic Calibration of Single cylinder SI-Engine
1.Run the case at 1800 rpm and list down important parameters (20 Marks)
- air flow rate
- BMEP
- BSFC
- In-cylinder pressure
2. Increase the power output at 3600 rpm by 10% (30 Marks)
Template
Results
1st case:At 1800 rpm
Air flow rate : The amount of air (in kg) flow flowing in the cylinder per hour is 24.6(kg/h)
BMEP : The brake mean effective pressure (BMEP) is what we have at the crankshaft. =9.48 bar
BSFC : Measure of fuel efficiency within a shaft reciprocating engine. It is the rate of fuel consumption divided by the power produced. It is 239.2g/KW-h
In-cylinder pressure : The maximum pressure that cylinder reaches during combustion process is 48.86 bar
In-Cylinder Pressure:
2nd case:Increase the power output at 3600 rpm by 10%
By changing the stroke length, by raising the stroke length from 86 to 96 mm we obtain an increase of power O/P to 16.6 to 18.5 HP which is 10% increase in power.
Changing CR and Air/Fuel ratio can lead to more knocking and CO emissions respectivey.So changing cylinder geometry is more feasible