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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