hello i have a small question about the waste spark system. i have this system in my Honda CBR 4 cylinder bike. one coil fires two cylinders at once. so according to the motorcycle manufacturer Honda and the spark plug manufacturer NGK, the secondary circuit is a sole complete circuit.
as we can see in the above picture the EMF generated in the secondary winding (due to sudden collapse of the magnetic flux) goes through spark plug "A". then jumps through its center electrode to ground electrode. after that it uses the cylinder head as a conductor and jump from ground electrode to center electrode of the spark plug "B". finally it goes to the other end of the winding and the circuit completes.
recently i had to pull out a plug cap while the engine was running. but what i noticed was the other plug of the same coil kept firing without any problem. confirmed it by measuring the temperature of its exhaust pipe using an IR temperature gun. that cylinder was working perfectly fine.
but according to Honda and NGK the secondary circuit is a sole complete circuit. so if i pull out a plug cap the circuit opens. so in that kind of situation how the other plug keeps firing ? does the EMF behave different from battery voltage ? since it's a very high voltage does it still manage to make a spark by jumping through the spark plug electrodes ?
for instance let's say i pulled out the plug cap of plug "A" or plug "B". so the circuit opens. but in reality the other plug of the same coil kept firing. this is what i experienced. could someone explain this please. thank you
as we can see in the above picture the EMF generated in the secondary winding (due to sudden collapse of the magnetic flux) goes through spark plug "A". then jumps through its center electrode to ground electrode. after that it uses the cylinder head as a conductor and jump from ground electrode to center electrode of the spark plug "B". finally it goes to the other end of the winding and the circuit completes.
recently i had to pull out a plug cap while the engine was running. but what i noticed was the other plug of the same coil kept firing without any problem. confirmed it by measuring the temperature of its exhaust pipe using an IR temperature gun. that cylinder was working perfectly fine.
but according to Honda and NGK the secondary circuit is a sole complete circuit. so if i pull out a plug cap the circuit opens. so in that kind of situation how the other plug keeps firing ? does the EMF behave different from battery voltage ? since it's a very high voltage does it still manage to make a spark by jumping through the spark plug electrodes ?
for instance let's say i pulled out the plug cap of plug "A" or plug "B". so the circuit opens. but in reality the other plug of the same coil kept firing. this is what i experienced. could someone explain this please. thank you