otto .pdf exercise

QUESTION 3 A single-cylinder, four-stroke petrol engine working on the Otto cycle principle has a volume compression ratio of 8,5 : 1. The polytropic index for compression and expansion is 1,31. The brake power of the engine at 2 000 r/min is 11,9 kW. The mechanicai efficiency is 85%. The length of the stroke is 1,25 times the diameter of the piston. The indicated mean effective pressure is 1 000 kPa. The initial pressure of the cycie is 100 kPa. The temperature after expansion is 2,8 times the initial temperature. Take gamma as 1,4. Please turn over T1390(E)(A9)T Calculate the following: 3.1 The indicated power in KW The indicated work done in J/cycle The swept volume in m?, the diameter of the piston in mm and the length of the stroke in mm The volumes in cm?at the principle points The missing-pressures.at the prificiple points in kPa, The air standard efficiency