intake valve iii) iv) intake vi) compression How Tuel Injector power exnaust valve 30010 The diagrams show the cylinder of a petrol engine in 4 stages. Petrol vapour and air are drawn into the cylinder, The mixture is then squeezed together, and then exploded by a spark. The explosion pushes down the piston. The exhaust gases are then expelled from the cylinder. the temperature of the gas; the number of molecules in the cylinder; the internal energy of the gas; the work done on or by the gas: the thermal energy exchanged with the environment. exhaust Use the first law of thermodynamics to analyse the energy changes during the process. At each stage explain what happens to the pressure of the gas; abrila

Gasoline in a fuel tank has been contaminated with water from condensation. Tech a says it will stay on the surface of the fuel and can be skimmed (removed) off. Tech b says that it will dissolve in the gasoline and be burned during the combustion process. Who is correct?

Determine the ideal and actual work into the compression process for agasoline engine with an isentropic efficiency of 75% and a compression ratio of 12.The inlet temperature and pressure are 300 [K] and 100 [kPa] respectively.

Q6. Answer following questions by True or False 1. Injector that sprays into the intake system operate at the same pressure of the carburetor. 2. Swirl in the cylinder enhances the mixing of air and fuel to give a homogeneous mixture in the very short time. 3. Flame development region is consumed 80% of the air-fuel mixture. 4. Maximum temperature and pressure of flame propagation occurs somewhere between 20" and 30° aTDC for a four-stroke cycle. 5. Knock caused by self-ignition could occur in S1 engines as well as in CI engines. 6. Detonation is the minimum combustion time possible without actually having an instantaneous constant-volume reaction. 7. Combustion in a CI engine is a flame front moving through a homogeneous mixture. 8. Fuel injection time in CI engine is usually starting at about 15° bTDC and ending about 5° aTDC. 9. Exhaust blowdown occurs when the exhaust valve starts to open somewhere around 60° to 40° bTDC. 10. The average temperature in the exhaust system of a…