1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards VEHICLE ELECTROMAGNETIC IMMUNITY BULK CURRENT INJECTION TEST METHOD Do Not Use on New Programs. Being Replaced by GMW3091 EDS-T-5527 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 (Superceded) EDS-T-5
2、527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 1/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. Variant Program). It is Superceded for all future projects
3、and replaced by GMW3091. 1. PURPOSE This standard aim at specifying the methods of testing immunity of the vehicle electric parts and electronic systems against electromagnetic wave generated from the wireless phone or high output transmission antenna by applying the narrow band electromagnetic wave
4、 to the vehicle wiring harness bundle. 2. SCOPE This standard applies to all electric parts and electronic systems in the vehicle that may function erroneously influenced by electromagnetic wave. (Engine ECM, TCM, ACM, ABS, air bag, etc.) 3. DEFINITION OF TERMS 3.1. BCI (Bulk Current Injection) A me
5、thod of inducing high frequency current to the wiring harness. Unit of current injection is mA. 3.2. Threshold The value of current induced at the point where electric parts or electronic system operate erroneously 3.3. Standing wave ratio Ratio of the wave at which the ratio of an instantaneous val
6、ue at a point to that in another point does not vary proportional to the time for a certain component of electromagnetic field. It is usually generated by the reflected wave. 3.4. Carrier Continuous electromagnetic wave having one or more characteristics that can be changed by modulation based on a
7、known value and repeat and change to the time 3.5. Parameter A basic item to be designated in performing test or establishing a system 3.6. Injection probe A probe clamped around wiring harness to induce high frequency current 3.7. Monitoring probe A probe clamped around wiring harness to measure th
8、e induced current 3.8. Root Mean Square Voltage Peak-Peak RMS value EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 2/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology 3.9. Impedance Ratio of voltage to current in AC ci
9、rcuit 3.10. RF (Radio Frequency) Radio frequency 3.11. Coupling Coupling of circuits 4. TEST EQUIPMENT 4.1. RF signal generator Signal generator having a minimum frequency band width of 1 400MHz. The RF signal generator used by GMDAT is HP 8657B. The used frequency is 100KHz 2GHz. 4.2. Audio power a
10、mplifier Audio power amplifier having a minimum frequency band width of 1 400MHz. The audio power amplifier used by GMDAT is Amplifier Research 150L(100KHz 220MHz) and 200HA(220MHz 400MHz). 4.3. Current injection probe Injection probe having a minimum frequency band width of 1 400MHz. The injection
11、probe used by GMDAT is FCC F-130A and F-140. 4.4. Current monitoring probe Monitoring probe having a minimum frequency band width of 1 400MHz. The monitoring probe used by GMDAT is FCC F-42 and F-51. The output voltage (Vout) of the measuring probe shall be converted to the induced current (Iind) by
12、 the following formula: Iind(dBuA) = Vout(dBuV) - Zt(dB ) Zt : monitoring probe transfer impedance 4.5. System controller Controller to control test equipment and software 4.6. System interface The system interface used by GMDAT is System Interface 200 of EMC Auto-Mation. 4.7. Attenuator The attenua
13、tor used by GMDAT is Weinschel Associates 20dB, 30dB and 40dB. 4.8. Data monitoring system Data monitoring system mainly used by GMDAT is TESEO AFOM MF. EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 3/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSI
14、ON: 3 GM DAEWOO Auto & Technology 4.9. Power meter The power meter used by GMDAT is BOONTON 4300. 5. TEST CONDITIONS 5.1. Test temperature & supply voltage Heat is generated in the test facility when the vehicle is operated during the performance of the test. Sufficient cooling must be provided to e
15、nsure that the engine does not overheat. The ambient temperature of the measuring equipment during test shall be 235. For test requiring engine driving, electric charging device shall be available. For test not requiring engine driving, the battery voltage shall be kept to at least 12.2V for the 12V
16、 system and 24.4V for the 24V system. 5.2. Frequency range The test frequency range for vehicle electric/electronic devices shall be 1 400MHz. In BCI test method, the frequency range is related to frequency characteristics of the current probe. To expand the test frequency range, a current probe sui
17、table for the test frequency range is required. 5.3. Modulation Prior to test, the types of frequency and modulation to apply to the test vehicle shall be determined according to the test sample. Unless specific value is agreed on, the following modulation type is used: a. No Modulation - CW CW : Co
18、ntinuous Wave b. 1KHz Sine Wave Amplitude Modulation 80% 5.4. Dwell time At each frequency, the test sample/system will be exposed to the test application level of minimum response time required for sample control. In all cases, the minimum exposure time to electromagnetic wave is represented by the
19、 following formula: tmin 2S 5.5. Frequency steps Test shall be performed to the maximum frequency step size as shown in Table 1. Table 1 Frequency Step Size Frequency Band Maximum Frequency Step Size 1 10MHz 10 200MHz 200 400Mhz 1MHz 2MHz 20MHz Alternatively, logarithmic frequency step, with the sam
20、e minimum number of frequency step in each frequency band, can be used. Following agreement among users, the value shall be recorded in the test report. Note) When the threshold of the test sample appears very close to the selected test level, the sizes of the EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUN
21、ITY-BULK CURRENT INJECTION TEST METHOD PAGE: 4/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology frequency steps shall be subdivided in the related frequency range to find out the minimum threshold. 5.6. Test severity levels The tester shall enumerate eve
22、ry severity level in the test frequency range. The proposed test severity levels are shown in Attachment 5. These test severity levels are represented being converted to the equivalent RMS of unmodulated waves. 6. TEST SYSTEM DESCRIPTION AND STANDARDS 6.1. BCI system BCI is a method of performing im
23、munity test by inducing electromagnetic interference signals directly to the wiring harness with the injection probe. The injection probe passes through the wiring harness of the test sample by way of the current transformer and changes the frequency and severity level of the electromagnetic interfe
24、rence to carry out immunity test. BCI is used for immunity test of each independent system in the vehicle. 6.2. Injection probe and monitoring probe Attachment 1 shows BCI test equipment set-up. To connect the test equipment to the sample, installation of the injection probe capable of operating in
25、the entire test frequency range is required. The injection probe shall withstand continuous input power throughout the test frequency range regardless of the equipment loads. The monitoring probe shall be capable of operating in the entire test frequency range. The monitoring probe shall be position
26、ed within the corrected load impedance. 6.3. Test set-up Test shall be performed without additional ground connection of the test vehicle. Test shall be performed in an electromagnetic shield room or anechoic chamber. The vehicle and all other conductive structures (except for ground surface beneath
27、 the vehicle) and walls of the electromagnetic shield room shall be at least 0.5m apart.7. TEST METHODS 7.1. Test plan Before carrying test, a test plan shall be generated which includes the operating mode of the sample, evaluation criteria, special change items and change in test standards. All tes
28、t samples shall be tested at least in the stand-by mode and all operating conditions and critical conditions 7.2. Type of test As dangerous voltage and electromagnetic field may be present in the test area, special care shall be taken of the exposure of the tester to the place where RF energy is joi
29、ned. The BCI test may be conducted by either of the two: the injection probe method and monitoring probe method. In both tests, the test equipment shall be connected in a similar method as shown in Attachment 1. EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 5/13
30、 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology 7.2.1. Calibrated injection probe method This method is based on the use of NET POWER as standard parameters for correction and measuring. The test level (E-field, current, voltage, power) specified in this
31、test shall be corrected prior to test. This test is performed by applying current to the sample according to test signals and corrected values as defined in the test plan. Measurements using this method can be affected by coupling between the injection probe and wiring harness as well as by reflecte
32、d energy. During the test, the net power shall be maintained relative to the calibration point up to a limit 2dB increase in forward power. Note1) If the net power level increases by 2dB or more, it shall be entered in the test report. Note2) If SWR is smaller than 1.2 : 1 in the test system at test
33、, the net power is used as a major parameter for the test. Place the injection probe around 150mm 10mm from the connecting portion of the test sample wiring connector in the vehicle. 7.2.2. Monitor current probe method Increase RF power applied to the injection probe. (1) The pre-determined maximum
34、level reaches the applied current level. This induced current is measured with a monitoring probe. (2) The maximum net power specified in the test plan reaches the injection probe. The measuring probe shall be calibrated with the method shown in Attachment 4. Enter the threshold along with the frequ
35、ency. 7.3. Test report The test equipment calibration status, test place, test sample/test system name, frequency, applied power and system interaction shall be entered in the test report. 8. TEST PROCEDURES 8.1. Generate a vehicle test plan. 8.1.1. Test date 8.1.2. Tester 8.1.3. Test sample/system
36、name 8.1.4. Test level 8.1.5. Test frequency and modulation type 8.1.6. Data monitoring preparation (Engine ECM signal, etc.) 8.1.7. Test plan preparation 8.2. Set up the calibration jig to prepare for calibration. EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 6
37、/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology 8.3. For calibration, refer to test items in clause 7.3. 8.4. Turn on the test equipment and check the equipment conditions. 8.5. When no problem is found in the test equipment, perform test. 8.5.1. Perfo
38、rm test in 1KHz sine wave, amplitude modulation 80% mode. 8.5.2. Perform test in the CW mode. 8.6. Place the test vehicle in the electromagnetic shield room or anechoic chamber. 8.7. Set up test equipment to the test sample/system in the vehicle. 8.8. Set up devices for data monitoring. 8.9. Perform
39、 test. 8.10. For other test procedures, see BCI engineering standard (EDS-T-5512). 9. REFERENCES SAE J551/13 ISO 11451/4 EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 7/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technolog
40、y Attachment 1. Example of BCI Test System Configuration EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 8/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Attachment 2. Injection Probe Calibration Test Jig EDS-T-5527V
41、EHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 9/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Attachment 3. Example of Current Injection Probe Calibration Configuration EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT
42、 INJECTION TEST METHOD PAGE: 10/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Attachment 4. Example of Current Monitoring Probe Calibration Configuration EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 11/13 ISSUED
43、DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Attachment 5. Test Severity Level EXAMPLE OF TEST SEVERITY LEVELS TEST SERVERITY LEVELS INJECTED CURRENT (mA) L5 L4 L3 L2 L1 100 80 60 40 25 EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST MET
44、HOD PAGE: 12/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology Attachment 6. Evaluation Criteria Of Electric Field Level 1. Classification based on vehicle operation or importance of control 1) Class A : Functions simply providing convenience - Clock Oper
45、ation, Proper Cellular Phone Operation - Entertainment Radio Operation, Navigational Display Operation - Illuminated Entry Operation, Keyless Entry Operation - I/P Cluster Operation, Auto Calculator Operation - Chime Module Operation, Park and Marker Lamps - Trip Odometer Operation, Climate Control
46、Display - Display Information Center, Voice Module Operation - Fuel Data Calculator 2) Class B : Functions providing convenience but not essential for vehicle operation and control - Proper Operation of Telltales, Cruise Control Speed Stability - Engine RPM Stability, Maintain Cruise Control Functio
47、ns - Electronic Climate Control Functions, Tachometer Operation - Fuel Gauge Operation, Dimming Sentinel Operation - Electronic Compass Calibration Stability, CRT Display Operation 3) Class C : Functions essential for vehicle operation and control - Vehicle Braking Ability, Freedom from Engine Stall
48、ing - Freedom from Unwanted Acceleration, Vehicle Steering Ability - Windshields Defrost System Operation, Twilight Sentinel Operation - Head Lamp and Tail Lamp Operation, Power Seat Position - Turn Signal Operation, CHMSL Operation - Anti-Lock Brakes Operation, Season Odometer Stability - Transmiss
49、ion Operation, Inflatable Restraints Proper Operation - Seat Belt Proper Operation, Power Window Stability - W/S Wiper Proper Operation, PRNDL Operation EDS-T-5527VEHICLE ELECTROMAGNETIC IMMUNITY-BULK CURRENT INJECTION TEST METHOD PAGE: 13/13 ISSUED DATE: 1998. 07. 04 REVISED DATE: 2008. 11. 04 VERSION: 3 GM DAEWOO Auto & Technology 2. Classification according to immunity to electromagnetic interference 1) Region : No faulty operation during/after exposure to electromagnetic interference. 2) Region : Faulty operation is present during expos
