ISO7637-2 Electrical Transient Conduction Along Supply of Road Vehicles

ISO 7637-2:2004

Background

Voltage Transient EmissionSetup Requirement

Transient ImmunitySetup upRequirementPerformance Criteria

emi te l AG • Ohmstrasse1 • 94342 Strasskirchen • GERMANY November 2008 Page 2 of 25

Background

ISO 7637-2:2004 Road vehicles – Electrical disturbances from conduction and couplingPart 2: Electrical transient conduction along supply lines only

Transient source in the Car:- Inductive load- Switching process- Sudden interruption of current- energizing the starter -motor circuit of the internal combustion engines- Load dump transient

emitel AG • Ohmstrasse 1 • 94342 Strasskirchen • GERMANY November 2008 Page 3 of 25

Background

Government, 72/245/EC, 2004/104/EC, 2006/96/ECWorld trade Committee, ECE R10.03Manufacturer Requirement, BMW, GS 95002

Equipment installed on passenger cars and light commercial vehicles

12V or 24V vehicles system

Bench Test Standard


Background

VehiclesVehicles

Electrical / Electronical SubassembliesElectrical / Electronical Subassemblies


Voltage Transient Emission Test


Device generate the conducted emission of transient for the switching process.

All wiring and Device 50mm above the ground plane

Switch Close, Switch Open, Change of State

Slow pulse (ms range or slower) and Fast pulses (ns to ms range)

In 2004/104/EC and ECE R10.03, no switch or no inductive load device is exempted









Transient Immunity Test


Susceptibility of Transient Emission

Pulse 1Pulse 2a and Pulse 2bPulse 3a and Pulse 3bPulse 4Pulse 5a and Pulse 5b

Pulses 3a and 3b, 0.5m between terminal and Device and 50mm above the ground plane.

Evaluate the device during and after test.

Pulse 1


Simulation of transients due to supply disconnection from inductive loads

Pulse 2a


Simulate transients due to sudden interruption of currents in a device connected in parallel with Device due to inductance of wiring harness

Pulse 2b


Simulate transients from d.c. motor acting as generators after the ignition is switched off

Pulse 3a


Simulation of transients which occur as a result the switching process

Pulse 3b


Simulation of transients which occur as a result the switching process

Pulse 4


Simulate supply voltage reduction caused by energizing the startSimulate supply voltage reduction caused by energizing the start erer--motor circuit of internal motor circuit of internal combustion engines, excluding spikes associated with startingcombustion engines, excluding spikes associated with starting

Pulse 5a


Simulation of the load dump transientSimulation of the load dump transient

Pulse 5b


Simulation of the load dump transientSimulation of the load dump transient

E.gE.g UUss** = 80V, U= 80V, Uss

** = 32V for BMW= 32V for BMW

Conducted Transient Immunity for ESA


Conducted Transient Immunity for ESA


Example criteria from 2004/104/EC

emitel AG • Ohmstrasse 1 • 94342 Strasskirchen • GERMANY

Test pulse numberTest pulse number Immunity test levelImmunity test level Functional status for systemsFunctional status for systems

Related to Immunity related functions

Not related to Immunity related

functions

1 III C D

2a III B D

2b III C D

3a / 3b III A D

4 III B(for ESA which must be operational

during engine start phase)

C(for other ESA’s)

D

November 2008 Page 22 of 25

Immunity Requirements

emitel AG • Ohmstrasse 1 • 94342 Strasskirchen • GERMANY

Class A: all functions of a device or system perform as designed during and after exposure to a disturbance

Class B: all functions of a device or system perform as designed during exposure; however, one or more of them may go beyond the specified tolerance. All functions return automatically to within normal limits after exposure is removed. Memory functions shall remain class A.

Class C: one or more functions of a device or system do not perform as designed during exposure but return automatically to normal operation after exposure is removed.

Class D: one or more functions of a device or system do not perform as designed during exposure and do not return to normal operation until exposure is removed and thedevice/system is reset by simple “operator/use” action.

Class E: one or more functions of a device or system do not perform as designed during and after exposure and cannot be returned to proper operation without repairing or replacing the device/system.

November 2008 Page 23 of 25 emitel AG • Ohmstrasse 1 • 94342 Strasskirchen • GERMANY November 2008 Page 24 of 25


Documents

ISO7637-2 Electrical Transient Conduction Along Supply of Road Vehicles