This method of igniting is easier to control than a heat-source based
method. A suitable temperature at which the reaction will take is
typically fairly easy to estimate, whilst determining a heat source
value which achieves the same effect is difficult and is often requires
trial and error.
The new fractional control of value constraints has permitted the use of
fixedTemperatureConstraint in this way; both because it allows for
ramping and for limiting the duration over which the constraint is
applied.
19b3b2e563