Page 222 - Mechanic Diesel - TT
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MECHANIC DIESEL - CITS
3 Axial Type Drive Mechanism
Axial self-starter is used in some heavy motor vehicles and stationary engines. In this system, the drive pinion is
fitted with the armature shaft and the armature shaft itself moves forward in its initial movement and connects the
pinion to the flywheel.
When the starting switch is turned ON, the self-armature starts rotating at a slow speed initially. For this, auxiliary
shunt and series winding are combined as a special arrangement. In this type of self-starter, a two-step solenoid
switch is also used.
And the biggest advantage of this system is that the grip of the pinion and flywheel ring gear is very good and the
teeth of the pinion do not get spoiled for a long time. The structure of the axial drive mechanism is shown in the
figure. Section with some self-starters in addition to the above drive mechanism
Reversible switches are also used. Using these, electric current by changing the direction of flow, the pinion is
disconnected from the flywheel. Arrangements are made. Over running clutch is also used for this purpose in
some self. It is done for.
Other Methods of Starting Engines
Various types of starting methods and systems are used to start any engine. The simplest starting method is by
pulling the rope or cracking by hand. But these methods can be used only for small engines. The most popular
method of starting the engine is to use an electric start powered by a lead acid battery.
To maintain battery capacity, an alternator or dynamo is used, driven by a belt from the engine. The following
various methods are used to start the engine:
1 Starting by Self Starter (Electric Starting)
For this, 12 volt D.C. Motor is used. This motor rotates with the electric current received from the battery. As soon
as the switch is turned on, its pinion moves forward by rotating and the teeth of the pinion start the engine by
rotating the ring gear of the flywheel. A solenoid switch is used to supply current to this motor.
Precautions: The following precautions should be taken to start the engine by self-starter:
• The battery should be fully charged.
• Hands should be completely grease free.
• The wiring of the engine should be completely arranged.
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CITS : Automotive - Mechanic Diesel - Lesson 62 - 66
