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Method for fault monitoring at a lighting output of a motor vehicle

An output terminal, motor vehicle technology, applied in lighting devices, lamp testing, vehicle components, etc., can solve problems such as fault information

Inactive Publication Date: 2011-04-06
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the disadvantage that the measured current intensity of the lighting device fluctuates with the operating voltage
Since the operating voltage is also subject to fluctuations during the operation of the motor vehicle, this method can lead to fault messages even though all lights connected to the light output are active

Method used

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  • Method for fault monitoring at a lighting output of a motor vehicle
  • Method for fault monitoring at a lighting output of a motor vehicle
  • Method for fault monitoring at a lighting output of a motor vehicle

Examples

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Embodiment Construction

[0018] figure 1 A device 2 arranged in a motor vehicle electrical system 1 of a motor vehicle for carrying out a method for monitoring a lighting output 3 is schematically shown. Connected to the light output 3 are two lamps 4 , 5 , one of which is designed as an incandescent lamp and the other as a light-emitting diode. The device 2 and thus the lighting output 3 are powered by a battery 6 and a generator 7 . Furthermore, device 2 has a signal generator 8 for emitting visual and / or audible error messages.

[0019] A method for monitoring a lighting output is implemented by activating the lighting output 3 in a first step via the connection to the motor vehicle electrical system 1 . In a second step, a time interval is then waited until a constant current intensity I occurs. If, for example, an incandescent lamp is heated, the current intensity I is usually constant after approximately 100 ms. After a constant current intensity I has occurred, in a third step a different r...

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Abstract

The invention relates to a method for fault monitoring at a lighting output (3) of a motor vehicle, wherein reference current values are first measured and calculated at various reference voltages. During operation of the lighting output (3), operating current values and operating voltages are measured. If the operating current value at the measured operating voltage deviates from the reference current value at the corresponding reference voltage, then a fault message is output. Said method is suitable for detecting a fault even for unknown lamps (4, 5) at the lighting output (3).

Description

technical field [0001] The invention relates to a method for monitoring faults at a lighting output of a motor vehicle, wherein an operating current intensity is measured at the lighting output and a fault message is issued if the measured operating current intensity deviates from a predetermined desired value. Background technique [0002] In today's motor vehicles, external lighting devices connected to various lighting outputs are electronically monitored for malfunctions. The monitoring of faults extends to the detection of short circuits or lamp failures. In the case of known loads connected to the lighting output, detection can be carried out simply by a simple measurement of the current intensity. [0003] However, for example in the case of a trailer connected to a motor vehicle, it is generally not known which and how many lamps are connected and whether under certain conditions there is even a mixed arrangement of light-emitting diodes and incandescent lamps. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B37/034H05B33/0893B60Q1/305B60Q11/00G01R31/006G01R31/44H05B45/58H05B47/22
Inventor 阿尔内·罗德默
Owner CONTINENTAL AUTOMOTIVE GMBH