Thermodynamics Cycles (Piston Question)

[Jtny179]

A 4 cylinder car has 4 Pistons
The cycle is
1-2 : Adiabatic compression of air
- then injects fuel
2-3 : Burn Fuel
3-4 : Adiabatic expansion of gas
4-1 : Exchaust / Replace with fresh air

Homework Statement

Diameter = 10 cm
Minimum depth 1 cm
Maximum depth 10 cm
Heating value of fuel is 2,100 j/g
Each cycle uses 0.005g of fuel
Temp of air = 25 degree celcius
Pressure of air = 101 325 Pa

Homework Equations

Draw P-V Diagram
Calculate P,T,V at all points (1,2,3,4)
Calculate power produced by car at 100 RPM , 500 RPM and 1000 RPM

The Attempt at a Solution

 

[Jtny179]

So basically.. I have the P-V Diagram..
To my understanding you need to calculate power produced by car at 100 RPM to get P,T,V at all points..

Any help? PLEASE

 

[LawrenceC]

Hint: Polytropic relationships