Testing >> Electromagnetic Compatibility >> Automotive

Eurofins Product Testing - EMC - automotive

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The electric systems of modern cars are getting increasingly complex. With the electronic equipment of automobiles growing, so is the concern for electromagnetic compatibility (EMC) of automotive systems. The methods and specifications designers have been using are being challenged by changes in automotive technology such as telematics, electric power, the use of electronic control systems in place of mechanical ones, electronic locks, keyless entry, power windows and mirrors, power seating. Complex wire harnesses will be replaced with serial communications buses and wireless signaling for sensors. Vehicles will contain noise-canceling entertainment systems, wireless voice and digital communications, active suspension, antilock brakes, satellite navigation and multi-way sound systems -to list only a small selection.

The growth of electronics in automobiles has been staggering. Many industry analysts expect that by 2010, nearly 30 % of an automobile's cost will be its electronic components. But, in order to reduce weight, size and costs, the cables from the converter modules to the loads are commonly unshielded. The wiring harnesses are located with some space between the car chassis which works as a ground plane. Parasitic capacitance creates current loops, long unshielded cables work as antennas.

All these components in conjunction with the undefined environment an automotive device can meet during its life cycle give a wide range of potential interference problems. Standardization organisation like the International Electrotechnical Commission (IEC -homepage ), the International Standards Organization (ISO - homepage ) and the Society of Automotive Engineers (SAE - homepage ) develop EMC test standards since the early 1990s. In Europe, the Commission Directive 2009/19/EC and Council Directive 72/245/EEC relating to the radio interference (electromagnetic compatibility) of vehicles (Text with EEA relevance) form part of European legislation for automotive type approval and lead to the e-marking of automotive equipment.

Eurofins is accredited by the German "Kraftfahrt Bundesamt" and can perform tests according to the standards for emission and immunity for electronic components.

EMC automotive test standards performed by Eurofins:

 

Standard

Test - Procedure

 
2009/19/EC "e" marking directive  
75/322/EC ver. 2001/3/EC Agricultural or Forestry Tractors and Tractor Components directive  
2004/108/EC EMC Directive  
97/24EC ver.2003/77/EC Chap. 8 Motor Cycle directive  
ECE-R 10, Ä 03 EMC for vehicles "E" marking directive  
74/61/EC version 95/56/EC Annex VI Anti-theft devices  
CISPR 25 Measurement of radiated broadband electro magnetic emissions from electrical / electronical sub-assemblies according to directive, annex VII  
CISPR 25 Measurement of radiated narrowband electromagnetic emissions from electrical / electronical sub-assemblies according to directive, annex VII  
ISO 11452-1 Testing of immunity of electrical / electronical sub-assemblies  
ISO 11452-2 Absorber-lined sheilded enclosure, annex IX ; radiated Immunity 80 MHz - 4 GHz; until 200 V/m  
ISO 11452-4 BCI Bulkcurrent injection  
ISO 11452-5 Stripline  
ISO 7637 Testing of the immunity to and emission of transient disturbances conducted along supply lines according to directive, annex X Impulse: 1, 2a,2b, 3a, 3b, 4, 5a, 5b, 7  
  Test according to Technical Specifications by various car manufacturers (BMW / VW / Fiat / Renault ... )  

 

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or via eMail: EMC@eurofins.com
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