Method for testing electrical loads in a vehicle electrical system
First Claim
1. A method for testing electrical loads in a vehicle electrical system in which said loads are fed by a vehicle battery and are selectively switched on and off, with a load-specific current consumption in a switched-on state being determined and assessed in each case, the method comprising the steps of:
- measuring a battery voltage of the vehicle battery immediately before switching-off a previously switched-on load and again after the load is switched off once an inductive transient decays in order to determine a current consumption; and
determining the load-specific current consumption from a voltage difference between the battery voltage measured before the switching-off and after the switching-off.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for testing electrical loads in a vehicle electrical system is provided, in which the loads, which are fed by a vehicle battery, are selectively switched on and off. The load-specific current consumption in the switched-on state is determined and assessed in each case. The battery voltage is measured immediately before and shortly after the switching-off of a previously switched-on load in order to determine the load-specific current consumption value from the load-specific battery voltage difference. The internal resistance of the battery serves indirectly as the measuring resistance, which is determined by loading the battery with a known load on a trial basis.
17 Citations
11 Claims
-
1. A method for testing electrical loads in a vehicle electrical system in which said loads are fed by a vehicle battery and are selectively switched on and off, with a load-specific current consumption in a switched-on state being determined and assessed in each case, the method comprising the steps of:
-
measuring a battery voltage of the vehicle battery immediately before switching-off a previously switched-on load and again after the load is switched off once an inductive transient decays in order to determine a current consumption; and determining the load-specific current consumption from a voltage difference between the battery voltage measured before the switching-off and after the switching-off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for testing an electrical load in a vehicle electrical system in which said load is fed by a vehicle battery and is selectively switched on and off, with a load-specific current consumption in a switched-on state of the load being determined and assessed, the method comprising the steps of:
-
switching-on the load to be tested; measuring a battery voltage of the vehicle battery immediately before switching-off the load to be tested; measuring the battery voltage of the vehicle battery after the load is switched-off and an inductive transient decays; determining the load-specific current consumption from a voltage difference between the battery voltage measured immediately before switching-off the load and after the load is switched-off. - View Dependent Claims (11)
-
Specification