Re: Distributor 101 question?

Posted by HTR on June 15, 2002 at 20:14:01 from (162.33.111.12):

In Reply to: Distributor 101 question? posted by Mr. Kioti on June 14, 2002 at 16:52:20:

The condenser (capacitor) does a little more than most are giving it credit for. To start with people say when the points open the magnetic field created, by the current flow, in the primary winding collapses, when actually the field does not collapse until current stops flowing through the primary winding. When the points are closed, due to the path of least resistance, current simply flows to ground through the closed points. The capacitor is just going along for the ride, not being charged. When the points open this creates high resistance to ground. At this point the current continues to flow to and charge the capacitor. When the capacitor reaches full capacitance, the current flow through the primary winding, of the coil stops. The magnetic field collapses, and a high voltage is induced into the secondary winding, of the ignition coil (auto transformer). So, the condenser is the thing that actually causes the collapse, of the field, that causes the spark.

With the proper capacitance condenser and the engine operating at rated RPM the points should be near wide open when the spark to the plugs occurs.

There is more to the story if you get into the auto transformer (coil) in series and in phase, capacitor soak, and why plug wires become radio wave transmitters.

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