Factors affecting energy requirement of ignition system

Factors affecting energy requirement of ignition system
(a) Effect of series resistance:
-Energy dissipated during discharge and hence circuit energy stored in capacitance is more
-longer discharge time
(b) Effect of electrode material:
-ignition energy for electrode gaps larger than the quenching distance varies with materials for the electrode and increases with any change to material having higher boiling point
(c) Effect of spray inductance:
-presence of small stray inductance cause oscillatory discharge
-larger resistance, minimum inductance longer the discharge time
(d) Effect of electrode configuration:
-reduction in the capacitance reduces the discharge time and increase in the gas resistance which reduces the diameter of the spark channel
-increase the electrode gap means supply of ignition energy over interval of time decreases and spark channel also reduces