Question:-
Consider the following statements relevant to the ignition system of SI engine:
1. Too small a dwell angle will lead to the burning of condenser and contact points.
2. Too small a dwell angle will result in misfiring.
3. Too large a dwell angle will result in burning of condenser and contact points.
4. Too large a dwell angle will result in misfiring.
Which of the above statements are correct?
Option (A)
1 and 2
Option (B)
2 and 3
Option(C)
3 and 4
Option(D)
4 and 1
Correct Option:
(B)
Question Solution:
Dwell angle – period measured in degree of cam rotation during which the contact point remain closed.
The dwell angle must be sufficiently large to allow magnetic saturation of primary coil. To small dwell angle will result in lower secondary voltage and hence poor spark or misfiring.
Too large dwell angle will lead to burning of condenser and the contact points due to over saturation of winding
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