Download - Ignition System1
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IGNITION SYSTEM
Submitted by:
Aditya K. Singh
Akshat Agrawal Akash Trivedi
Ajay Barkhane
ME A6 th Sem.
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NEED FOR IGNITION SYSTEM
To start burning .
Temperature above self ignition.
It provides energy by electric spark.Spark intensity should be high.
Spark intensity if weak ignition will not be
initiated.
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ELECTRIC SPARK
Spark of 0.5 milliseconds is needed.
High voltage of 10000 V.
4-stroke engine: every 2 revolution2-stroke engine: every revolution
Ex- 6 cylinder 4-stroke engine(5000 rpm)
No. of sparks = 6*5000/2=15000
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REQUIREMENTS
Electrical supply.
Sufficient current.
Sufficient Duration.
Distributing device.
Light and Compact.
Easy to maintain.Battery voltage 6 to 12 volts.
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VARIOUS IGNITION SYSTEMS
Battery Ignition System.
Magneto Ignition System.
Electronic Ignition System.
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BATTERY IGNITION SYSTEM
AND ITS PARTS
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COMPONENTS
BATTERY
IGNITION SWITCH
IGNITION COIL
SWITCHING DEVICE
SPARK PLUG
CONDENSER AND DISTRIBUTOR
.
http://images.google.com/imgres?imgurl=http://www.quantumcars.co.uk/res/user/111_spark-plug.jpg&imgrefurl=http://www.quantumcars.co.uk/products/ignition/&h=666&w=1000&sz=62&hl=en&start=14&tbnid=Mb3FCmZdzfFcGM:&tbnh=99&tbnw=149&prev=/images%3Fq%3Dspark%2Bplug%26svnum%3D10%26hl%3Den%26rlz%3D1T4GFRC_enCA204CA205http://images.google.com/imgres?imgurl=http://www.ctcautoranch.com/NOS%2520Parts/Nos%2520Parts/Dist%2520Pickup%2520Coil,%2520Buick,%2520Cad,%2520Olds,%2520Chev,%2520Pontiac.JPG&imgrefurl=http://www.ctcautoranch.com/NOS%2520Parts/NOS%2520Parts.htm&h=239&w=295&sz=66&hl=en&start=1&tbnid=yo0l2EAX0p9-3M:&tbnh=93&tbnw=115&prev=/images%3Fq%3Ddistributor%2Bpick%2Bup%2Bcoil%26svnum%3D10%26hl%3Den%26rlz%3D1T4GFRC_enCA204CA205http://images.google.com/imgres?imgurl=http://www.sentex.net/~mwandel/cannon/coil.jpg&imgrefurl=http://www.sentex.net/~mwandel/cannon/sparky.html&h=288&w=154&sz=10&hl=en&start=5&tbnid=0d0CeyTV36Mr0M:&tbnh=115&tbnw=61&prev=/images%3Fq%3Dignition%2Bcoil%26svnum%3D10%26hl%3Den%26rlz%3D1T4GFRC_enCA204CA205http://images.google.com/imgres?imgurl=http://www.ronfrancis.com/images/part-pic457.jpg&imgrefurl=http://www.ronfrancis.com/synergyseries.htm&h=215&w=216&sz=16&hl=en&start=29&tbnid=zgVbS7kAur2V8M:&tbnh=107&tbnw=107&prev=/images%3Fq%3Dignition%2Bswitch%26start%3D20%26ndsp%3D20%26svnum%3D10%26hl%3Den%26rlz%3D1T4GFRC_enCA204CA205%26sa%3DNhttp://images.google.com/imgres?imgurl=http://www.acdelco.com/i/parts/battery/sidebar/hd_heavy_duty.jpg&imgrefurl=http://www.acdelco.com/parts/battery/heavy-duty-battery.htm&h=245&w=282&sz=23&hl=en&start=4&tbnid=IiXp-5Fuc_kqSM:&tbnh=99&tbnw=114&prev=/images%3Fq%3Dbattery%26svnum%3D10%26hl%3Den%26rlz%3D1T4GFRC_enCA204CA205%26sa%3DN -
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IGNITION CIRCUIT
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WORKING
When primary circuit is closed by contactbreaker , current begins to flow throughprimary coil and magnetize the core . Theemf is induced in secondary . This emf isproportional to magnetic flux .But , the emfproduced in secondary is not sufficient to
produce the spark.
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IGNITION SYSTEM
Dynamo/Alternator System
Dynamo/Alternator
Distributor
Contact
Breaker
Coil
IgnitionSwitch
SecondaryWindings
PrimaryWindings
Condenser
Battery
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CONTINUED
When primary circuit is opened by contactbreaker magnetic field collapses Condenserconnected in primary circuit helps tocollapse the field rapidly by absorbing partenergy of magnetic field which is thrownback into the primary winding and
produces a very high voltage in secondaryand produces spark.
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BATTERY
Used for starting and vehicle lighting.
Lead acid batteries are commonly used.
Consists of positive and negative platesimmersed in dil. sulphuric acid.
Electrolyte 1.2 to 1.28 SG ,25% acid.
Switch is used to avoid overcharging anddischarging.
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Ignition Coil
Primary Windings are made up of several
hundred turns of heavy wire wrapped aroundor near the secondary windings.
Secondary Windings consist of several thousand
turns of very fine wire, located inside or near
the secondary windings.
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Distributor
Actuates the on/off cycle of current flow through the ignition coil
primary windings.
It distributes the coils high voltage to the plugs wires.
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IGNITION SYSTEM
Spark Plug
Cap Connector
Outer Casing
Hexagon
Ceramic Body
Copper Sealing Gasket
OuterElectrode
GapSecuring Thread
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IGNITION SYSTEM
Spark Plug
Centre Electrode
These surfaces must bekept clean
Seal
Change Spark Plugsat specified times
Make sure the correctSpark Plug is fitted
Cap Connector
Outer Casing
Hexagon
Ceramic Body
Copper Sealing Gasket
OuterElectrode
Securing Thread
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CAPACITOR
Works as a electrical capacitor.
Two plates and in between air.
If a material is used in between it should bethin.
But, should withstand electrostaticstresses.
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ADVANTAGES
Better spark at low speed.
Low initial cost.
Reliable.Less maintenance.
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DISADVANTAGES
Primary voltage decreases as engine speeddecreases.
Frequent servicing.
Breaker points are subjected to wear.
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THANKYOU