What are the advantages and disadvantages of an over-square engine?

Describe in your own words the operation of a petrol engine, and explain how it is estimated by the idealised Otto cycle. [Hint: you can make use of one or more diagrams.]

Q1/ Answer the following questions: 1. We can classify I.C. engines to give a clear description for any engine? Give your opinion about that. 2. Side thrust force may give an indication about the engine performance. Discuss that. 3. It is possible to increase the mechanical efficiency of the turbocharger. Do you agree? Why? 4. How is the friction force reduced? 5. If the engine designers reduce the piston skirt length as much as possible, is this considered as an advantage for the I.C. engine?

3. A double-acting, 8 cylinder, four-stroke cycle diesel engine with a bore and stroke of 2.2 ft x 2.8 ft operating at 320 rpm, consumes 42.5 lb/hr of fuel with heating value of 44,230 kJ/kg. The indicated mean effective pressure is 52.5 psi. The load on the brake arm, which is 12.7 ft is 13,575 pounds. What is the brake arm mean effective pressure? a.) 88.35 Psi b.) 74.57 psi c.) 96.49 psi d.) 67.85 psi