For your car's engine to be able to start, several things have to happen. The flywheel needs to turn the crankshaft, which moves the pistons up and down, which in turn makes the valves draw air into the combustion chamber to mix with fuel to ignite. The process starts when your car's starter motor connects gears with the flywheel after the key switch is turned to start. The starter motor will disengage after the engine is started. Your car's battery provides electricity to turn the starter, and your car's alternator keeps the battery charged and powers all the accessories in your car once it's running. The alternator generates more electricity the faster your car's engine runs. The voltage regulator in your car controls the amount of current to the battery and prevents damage from overcharging. Contact a qualified mechanic in your area for more information on your car's starting system.