CAR ENGINE 2

               
                    The Car Engine

In our previous log we checked on the various parts of a car engine, we join up all the parts and form an engine then after that we can now crank our engine.

So what happens, when you ignite your car?. The starter motor has a driving sprocket that gets engaged into the fly wheel, and getting the energy from the battery, it drives the huge fly wheel which has cog wheel teeths too on its perimeter.

When the fly wheel turns it does so together with the crankshaft, the crankshaft rotates and since pistons are fixed on it, they move up according to the timing sequence, now the ECU isn't asleep, a command has been sent to fuel pump inside the fuel tank and fuel is pumped towards the nozzle's, this nozzle's spray fuel into the intake manifold and the fuel gets some air spray and is  mixed properly as commanded by the ECU.

 Now when the crankshaft turned, it turned together with camshafts through the timing chain,the camshafts opens up the intake valves and they let in airfuel mixture into the cylinder bores.

That mixture meets the pistons as they are moving up and its compressed up under high pressure.  The ECU sends another command to the ignition coils and they charge the plugs with a high current which discharges inside the cylinder head and causes a fire.

 That fire burns the compressed air fuel mixture and brings about the release of a tremendous bout of  energy that pushes the pistons down and vroom your car engine is alive.

Now that process is repeated thousand of times per minute and that's how you get that nice quite rumble of the car engine under idling.

Nb; The part of starter turning the fly wheel isn't repeated except when you switch off the engine and you want to get it alive again.