940 L4-2.3L SOHC VIN 88 B230F (1992)
Principle
The construction of a starter motor is based on the principle that a current carrying conductor in a magnetic field is influenced by a force which tries to
push it away from the magnetic field.
Series motor
The illustration shows the principle behind a two pole series motor. The armature consists of a coil which rotates because of the force in effect between it
and the electromagnet's magnetic field. The armature and field coils are connected in series and consequently the same current flow through both of
them.
Function
The link between the flywheel ring gear and the starter motor occurs via the moveable drive (pinion) on the armature shaft. The drive is moved by a shift
lever connected to a solenoid. The starter motor drive is equipped with a free running clutch which prevents the starter motor from being driven when the
engine starts and the starter motor is kept engaged.
Current flow and magnetic flux