How do Magnetos and generators differ?

So I'm writing a paper for class on how cars work, and I have to have things about electronic detonation (so spark plugs), as well as Magnetos and generators (so Dynamo). I get how Magnetos and spark plugs work together, but every place I've looked seems to have the same info about Magnetos and Dynamo. Namely that they turn mechanical energy into electrical. Can anyone clear this up for me?

How do Magnetos and generators differ?myspace images

A dynamo gives a continuous output. A low tension (LT) magneto produces peaks of output, twice per revolution.

How do Magnetos and generators differ?christian myspace myspace.com

A magneto is a very special purpose generator, in that it just generates high voltage pulses to run the ignition system.

see http://en.wikipedia.org/wiki/Magneto_%28...

As opposed to that, generators and alternators generate DC voltage that is used to charge a battery and keep it charged.

Then, as needed current is drawn off the battery to run the various electrical elements of the car, one of which is the ignition system.

Dynamos (ie, a DC generator) are rarely used in autos today. AC generators (alternators) are used instead, where the AC output of the alternator is rectified with diodes to DC to charge the battery.