In order for an ignition system to produce constant energy the dwell angle
must increase as the engine speed increases. Ideal dwell values are held in
a look-up table; engine speed forms one axis and battery voltage the other. If
battery voltage falls, the dwell angle is increased to compensate. The ‘dwell
number’ is used in a similar way to the ‘timing number’ in the previous section
except that this time, the ‘dwell number’ is used to determine the switch-on
point of the coil during operation of the down counter.
9.5.4 Injection duration calculation
The main criteria for the quantity of fuel required ...
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