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ISO 9001:2000 Certified
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manufacturer & exporter of premium quality AUTO ELECTRICAL PARTS SUN AUTOELEKTRIK (P) LTD is a group of qualified professionals, with over 30 years of experience in the field of Automotive Electrical Parts
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IntroductionThe solenoid switches is the part
of automobile which relays a large electric current to the starter
motor. The system converts electrical energy from the batteries into
mechanical energy to turn the engine over. It is mounted on the starting
motor and forms the major component of the starting system. The coils
inside the solenoid are energized by electricity, they create a magnetic
field which attracts and pulls a plunger. Attached to one end of this
plunger is a shift lever. The lever is connected to the drive pinion and
clutch assembly of the starter motor. |
Ranges of Solenoid Switches
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Working PrincipleThe solenoid receives a large
electric current from the car battery and a small electric current from
the ignition switch. As the ignition switch is turned, a small electric
current is sent to the starter solenoid. The pair of heavy contacts
closes, relaying the a large electric current to the starter motor,
which in turn sets the engine in motion. Once the engine starts, the key-operated switch is turned, a spring in the solenoid assembly pulls the pinion gear away from the mesh, and the starter motor stops. The starter's pinion is clutched to its driveshaft through an overrunning sprag clutch which allows the pinion to transmit drive in only single direction. In this manner, drive is transmitted through the pinion to the flywheel ring gear. |
MaintenanceIf the power supply to the
solenoid is insufficient, it will fail to start the motor and may
produce a rapid clicking or clacking sound. The lack of the power may be
caused by by a low or dead battery, by corroded or loose connections in
the battery cable, or by a damaged positive (red) cable from the
battery. Any of such problem may create resistance for the current
resulting in proper transmission of the power. To reduce the chances for such as failure, the battery connections should be cleaned and tightened at every oil change. Starting fault of the solenoid can detected at service center by a test of the car's starting, charging and battery systems. |
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