The pistons turn the crankshaft. If the crankshaft is turned, the pistons will move. The coil, rotor arm, contact breaker, camshaft, sparking plugs will begin to work. The engine will start. How do we turn the crankshaft? This is done by the starter motor. This is a powerful electric motor. When the starter switch is turned, electricity from the battery flows to the starter motor. (Some cars have an ignition switch and a starter switch).
Two things happen:
1) A rod in the starter motor moves forward. There is a small gear wheel on the front of this rod. This meshes with the teeth of a larger wheel (the flywheel). The flywheel is fixed on the back end of the crankshaft.
2) The starter motor turns. It turns the flywheel and the crankshaft. The engine starts. The gear of the starter motor moves back from the flywheel.
2. Learn the new words:
rod – шток
gearwheel – зубчасте колесо
to mesh – зчіплювати, з’єднувати
teeth meshing – зубчасті з’єднання
flywheel – маховик
rod – шток, тяга; стержень; штанга, валок
rotor arm – важіль ротора
contact breaker – роз’єднувач контакту
camshaft – розподільний вал
motor – мотор, двигун
starter switch – перемикач стартера
in front of – перед
3. Answer the questions:
What turns the crankshaft?
What is the purpose of the starter motor?
Where does the starter motor get the electricity from?