Subject: Re: still no spark-HELP!
Author: Patrick Hayes
Date: Mar 30, 2003, 10:30 PM
Post ID: 1712443710
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In a message dated 03/30/2003 3:03:49 PM Pacific Standard Time,
adun-@midmaine.com writes:
| If I remove the condenser and try to crank the engine, will it work |
I think not. You probably won't get a spark. The concept of an induction
coil is to build a magnetic field (points closed to energize the coil with
12v low voltage). Then, disrupt or "collapse" that field as rapidly and
catastrophically as possible. The result is the "induction" of a spark with
low amperage but VERY high voltage. The more instantly you can collapse the
field, the hotter the resultant spark.
As the points begin to crack open, their surfaces become less and less in
contact over very small slices of time. The current across the points gets
less and less as they separate contact. Since this happens over a measurable
time period, the collapse of the coil field is gradual ( in a microscopic
sense) over that same time slice.
The condenser is added to act like a tiny reserve or battery to supply energy
to the coil. Just as the points begin to open and current would be expected
to decrease, the condenser bleeds off its stored electricity into the coil to
reduce the gradually declining charge from the points and to keep the field
at full potential until the points open and the condenser is fully
dissipated. At that instant, the coil field goes instantly from full charge
to zero charge and ZAP. The time frame of the collapsing is much quicker
with the condenser in place.
I think without the condenser you will generate no spark or very weak spark.
Patrick
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In a message dated 03/30/2003 3:03:49 PM Pacific Standard Time, adun-@midmaine.com writes:<BR>
<BR>
<BR>
<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> If I remove the<BR>
condenser and try to crank the engine, will it work </BLOCKQUOTE><BR>
<BR>
I think not. You probably won't get a spark. The concept of an induction coil is to build a magnetic field (points closed to energize the coil with 12v low voltage). Then, disrupt or "collapse" that field as rapidly and catastrophically as possible. The result is the "induction" of a spark with low amperage but VERY high voltage. The more instantly you can collapse the field, the hotter the resultant spark.<BR>
<BR>
As the points begin to crack open, their surfaces become less and less in contact over very small slices of time. The current across the points gets less and less as they separate contact. Since this happens over a measurable time period, the collapse of the coil field is gradual ( in a microscopic sense) over that same time slice.<BR>
<BR>
The condenser is added to act like a tiny reserve or battery to supply energy to the coil. Just as the points begin to open and current would be expected to decrease, the condenser bleeds off its stored electricity into the coil to reduce the gradually declining charge from the points and to keep the field at full potential until the points open and the condenser is fully dissipated. At that instant, the coil field goes instantly from full charge to zero charge and ZAP. The time frame of the collapsing is much quicker with the condenser in place.<BR>
<BR>
I think without the condenser you will generate no spark or very weak spark.<BR>
<BR>
Patrick</FONT>
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