Talk:Contact breaker

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Correct?[edit]

"As well as suppressing arcing, it helps boost the coil output by creating a resonant LC circuit with the coil windings." (my italics)

Is this true? I can see that it may form an LC tank cct, but does it make any difference in practice? --220.101.28.25 (talk) 20:45, 28 October 2009 (UTC)[reply]

Correct?[edit]

under "Operation"

"The contact breaker is operated by an engine-driven cam, and the position of the contact breaker is set so that they open (and hence generate a spark) at the exactly correct moment needed to ignite the fuel at the top of the piston's compression stroke.

The contact breaker is usually mounted on a plate that is able to rotate relative to the camshaft operating it. The plate is rotated by a centrifugal mechanism, thus advancing the ignition timing (making the spark occur earlier) at higher revolutions. This gives the fuel time to burn so that the resulting gases reach their maximum pressure at the same time as the piston reaches the top of the cylinder. The plate's position can also be moved a small distance using a small manifold vacuum-operated servomechanism, providing advanced timing when the engine is required to speed up on demand. This helps to prevent pre-ignition (or pinking)."

It seems most of this text (italicised) may belong more in the distributor article? This may make the points article so small it might then be merged with distributor?? Should this be done anyway??

NO mention of of gap adjustment.How importanct is it?
NO mention the points gap may be adjusted manually.

Comments Please? --220.101.28.25 (talk) 21:40, 28 October 2009 (UTC)[reply]