Explain how Ignition Coil works? - Pocket Bike Forum - Mini Bikes
 
LinkBack Thread Tools
post #1 of 7 (permalink) Old 12-04-2008 Thread Starter
verified
 
Join Date: Aug 2007
Posts: 27
Explain how Ignition Coil works?

Hey guys, I did a search and came up with nothing. I was wondering if someone could explain to me how an ignition coil works on pocketbikes. I've got a GPMX3 $200 cag I bought last year.
crusoe is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 12-04-2008
2strokefolk
Guest
 
Posts: n/a
Re: Explain how Ignition Coil works?

A magneto consists of five parts:

An armature. In the above magneto, the armature is shaped like a capital "U". The two ends of the U point toward the flywheel.
A primary coil of perhaps 200 turns of thick wire wrapped around one leg of the U
A secondary coil of perhaps 20,000 turns of very thin wire wrapped around the primary coil
A simple electronic control unit that commonly goes by the name "electronic ignition" (or a set of breaker points and a capacitor)
A pair of strong permanent magnets embedded in the engine's flywheel.
When the magnets fly past the U-shaped armature, they induce a magnetic field in the armature. This field induces some small amount of current in the primary and secondary coil. What we need, however, is extremely high voltage. Therefore, as the magnetic field in the armature reaches its maximum, a switch in the electronic control unit opens. This switch breaks the flow of current through the primary coil and causes a voltage spike (of perhaps 200 volts). The secondary coil, having 100 times more turns than the primary coil, amplifies this voltage to approximately 20,000 volts, and this voltage feeds to the spark plug.
post #3 of 7 (permalink) Old 12-04-2008 Thread Starter
verified
 
Join Date: Aug 2007
Posts: 27
Re: Explain how Ignition Coil works?

Sick explanation! That's what I thought it did, but was unware of how it amped up the power. Thanks!

So how would I go about testing to see if my ignition coil is any good?
crusoe is offline  
Sponsored Links
Advertisement
 
post #4 of 7 (permalink) Old 12-04-2008
Call Evil and it Appears
 
CAM2's Avatar
 
Join Date: Mar 2008
Age: 47
Posts: 18,253
Re: Explain how Ignition Coil works?

Test it with a digital multimeter...............

set meter to 500 or 750 volts a/c...................

pull sparkplug boot and stick red probe in boot.........................

ground the black probe .....................

pull start engine and read the multimeter.......................

it should read 448 volts a/c peak voltage...............................

the numbers will alternate but the top reading should hit 448nolts a/c everytime.......................Peace
CAM2 is offline  
post #5 of 7 (permalink) Old 12-07-2008 Thread Starter
verified
 
Join Date: Aug 2007
Posts: 27
Re: Explain how Ignition Coil works?

Ok, question though. Why do I set it to 500 or 750 volts a/c when the reading I'm looking for is below 500 volts? Or is it set above the 448 reading because the multimeter will read UP to 500 or 750 volts? As in the range 0 > 750.

I'm just looking at multimeters now, to purchase one, I'm noticing some have 500, some have 750, some have neither!?

Last edited by crusoe; 12-07-2008 at 12:56 AM.
crusoe is offline  
post #6 of 7 (permalink) Old 12-07-2008
PBP RACER
 
Rambo's Avatar
 
Join Date: Nov 2008
Posts: 121
Re: Explain how Ignition Coil works?

if i were you i would take it to a motorcycle shop and have them test it.
Rambo is offline  
post #7 of 7 (permalink) Old 12-07-2008
PBP RACER
 
El-Joppo's Avatar
 
Join Date: Sep 2008
Age: 33
Posts: 64
Re: Explain how Ignition Coil works?

Quote:
Originally Posted by crusoe View Post
Ok, question though. Why do I set it to 500 or 750 volts a/c when the reading I'm looking for is below 500 volts? Or is it set above the 448 reading because the multimeter will read UP to 500 or 750 volts? As in the range 0 > 750.

I'm just looking at multimeters now, to purchase one, I'm noticing some have 500, some have 750, some have neither!?
Because if you set it at for example 200, you will not get a reading, because you want to measure higher voltage.
Think of it like this, you set the range for what you want to measure, 0V being lowest, whatever number you set it to being the highest. So when you set the voltmeter to 200Va\c, you set it up for measuring voltage within the range of 0V to 200V. When you set it to 750, you set up the voltmeter for measuring voltage within the range of 0V to 750V.

Vroom, Vroom, BOOM.. - Hmm, aint that something..
El-Joppo is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pocket Bike Forum - Mini Bikes forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome