Figure 4.2 Comparison of the power required by the starter and the power available
from the battery plotted against temperature
Figure 4.1 Batteries
The rst of these two criteria is usually the deciding factor. Figure 4.2 shows
a graph comparing the power required by the starter and the power available
from the battery, plotted against temperature. The point at which the lines cross
is the cold start limit of the system (see also the chapter on starting systems).
European standards generally use the gure of 18°C as the cold start limit and
a battery to meet this requirement is selected.
Research has shown that under ‘normal’ cold ...
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