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post #1 of 7 (permalink) Old 05-06-2004, 08:24 AM Thread Starter
Supersport 600
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been studying the factory manual over the last few days trying to get a complete picture of the motor and its operation in my thick head. Little confused on ignition. Please someone explain since the 955 has no distributor what actuates the firing sequence of the cylinders ..is it the ECM in conjuction with the crankshaft position sensor?
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post #2 of 7 (permalink) Old 05-06-2004, 12:42 PM
Grand Prix 250
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Yes.

Basically the ECM stores a preprogrammed map that defines fuel delivery and timing. The program takes into account crank position, throttle position, engine speed, engine temp, air temp, amount of oxygen in the exhaust and other variables. Based upon the sensor inputs it looks at the map to see how much spark advance to dial in, how much fuel to deliver (duration of injection pulse) and which cylinder to actuate at any given moment.

It is pretty impressive really, what they can do with modern technology.

HTH

Regards,

Bruce G.

Sometimes I have to pay people to do it almost the way I want it, but mostly it isn't worth the hassle so I do it myself.
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post #3 of 7 (permalink) Old 05-06-2004, 01:37 PM Thread Starter
Supersport 600
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Thanks ...the ECM is the big swinging ....on the Sprint isn't it.Amazing.
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post #4 of 7 (permalink) Old 05-06-2004, 05:11 PM
Grand Prix 250
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Quote:
On 2004-05-06 12:37, dollardriven wrote:
Thanks ...the ECM is the big swinging ....on the Sprint isn't it.Amazing.
Is that actually English?
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post #5 of 7 (permalink) Old 05-06-2004, 06:43 PM
Supersport 600
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Yes. The last "...." is actually a word implied. If you are a male, you have one. :-D

-=I ride so other people can watch life pass 'em by=-

"I don't ride fast! I fly low" - unknown
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post #6 of 7 (permalink) Old 05-06-2004, 07:34 PM
Grand Prix 250
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The lightbulb has come on.
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post #7 of 7 (permalink) Old 05-06-2004, 08:17 PM Thread Starter
Supersport 600
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its a southern expression. meaning the most important ect. basically from the late 60-70 era armed forces centered "so who is the big swinging .... of this outfit."
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