Power Supply Function
U Voltage drop between DUT
and battery terminals
E-02 Transient Overvoltage Pulse
Transient overvoltages may occur in the electric system due to the switching off
of loads and due to short accelerator tip-ins. These overvoltages are simulated
by means of this test. This test may be used for the electrical life test. The test
pulse of E-02 Transient overvoltage is shown in the figure below:
E-04 Jump Start
External starting of the vehicle is simulated. The maximum test voltage results
from commercial vehicle systems and their increased power supply voltage.
The test pulse of E-04 Jump start is shown in the figure below:
E-05 Load Dump
Dumping of an electric load, in combination with a battery with reduced buffering
ability, results in an energy-rich overvoltage pulse due to the generator charac-
teristics. The test pulse of E-05 Load Dump is shown in the figure below:
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108
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