1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW15754 A/C Service Table Data Collection Procedure Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 1 of 6 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict bet
2、ween the English and domestic language, the English language shall take precedence. 1.1 Purpose. To develop air conditioning (A/C) diagnostic table for service manual and service technician usage. 1.2 Foreword. Not applicable. 1.3 Applicability. For all vehicles with vapor compression refrigerant sy
3、stems. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW15845 2.3 Additional References. CG2310, Data Sheet A1 - GMW15754 Service Table Data Collection Spreadsheet 3 Resour
4、ces 3.1 Facilities. An ambient chamber is required that is large enough to fit the test vehicle. Ambient capability required from 15 C to 50 C at 10% to 80% relative humidity (RH). 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration
5、label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.2 Equipment. GMW15845 defines specific requirements of all test instrumenta
6、tion. 3.2.1 Temperature measuring devices to record front grille temperature, front left center instrument panel (I/P) outlet and left second row seat panel outlet (if there is a rear HVAC system). 3.2.2 Pressure measuring devices for test vehicle refrigeration system service ports (one high pressur
7、e and one low pressure). The following pressure transducer would be for a typical R134a refrigerant system; high pressure device capable of 0 kPa to 3500 kPa 50 kPa and low pressure device capable of 0 kPa to 500 kPa 0 kPa. 3.2.3 Battery charger to maintain vehicle battery during test. 3.2.4 Voltage
8、 measurement device to record test vehicle battery voltage. 3.2.5 Fan speed measurement device to record vehicle engine cooling fan speed for vehicles equipped with a mechanical engine cooling fan. 3.2.6 Voltage measurement(s) for each fan motor if vehicle is equipped with electric engine cooling fa
9、n(s) (identify if pusher/puller/left/right). 3.3 Test Vehicle/Test Piece. Passenger vehicles equipped with an A/C and heater system. Vehicle configurations (diesel, turbo, single fan, dual fan, auxiliary HVAC, heavy duty, shutters, baffles, compressor Copyright General Motors Company Provided by IHS
10、 under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15754 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 2 of 6 drive ratio, etc.) and drive system operating mod
11、es are required for each unique idle service data set required for the service manual as determined by the Product Development Team (PDT). 3.4 Test Time. Calendar time: 1 to 2 days Test hours: 8 to 10 hours Coordination hours: 3 to 5 hours 3.5 Test Required Information. Not applicable. 3.6 Personnel
12、/Skills. One chamber operator. 4 Procedure 4.1 Preparation. Each vehicle shall be prepared for the climatic chamber testing with instrumentation described in 3.2. Vehicle shall have a full tank of gas and fully charged battery. Vehicles equipped with a refrigerant chiller require a method to power t
13、he chiller coolant pump on during this test. 4.2 Conditions. 4.2.1 Environmental Conditions. 4.2.1.1 Ambient. The temperature and humidity should be run as described in Table 1. Record the actual temperature and humidity at the test conditions from the facility instrumentation in the file CG2310 as
14、shown on Data Sheet A1. 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.2.2.1 The ambient temperature should be maintained to 1 C of the desired temper
15、ature. See Table 1. 4.2.2.2 The relative humidity should be maintained to 3% of the desired humidity. See Table 1. Table 1: Ambient Test Points Test Point Temperature (Degrees C) Relative Humidity % 1 15.0 60.0 2 22.0 20.0 3 22.0 60.0 4 27.0 20.0 5 27.0 40.0 6 27.0 60.0 7 32.0 20.0 8 32.0 40.0 9 32.
16、0 60.0 10 38.0 10.0 11 38.0 30.0 12 38.0 60.0 13 43.0 10.0 14 43.0 30.0 15 49.0 15.0 16 32.0 40.0 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STAN
17、DARDS GMW15754 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 3 of 6 4.3 Instructions. 4.3.1 Chamber fluorescent lighting is to be used. No solar load (simulate service garage conditions). 4.3.2 Set test vehicle front and rear (when equipped) HVAC control head temperature
18、 control to Full Cold (for manual control systems) or 16 C (60 F) (for automatic climate control). 4.3.3 Set test vehicle front and rear (when equipped) HVAC control head blower speed to high position (14 V). 4.3.4 Set test vehicle HVAC control head air inlet to recirculation position. 4.3.5 Set tes
19、t vehicle transmission or drive unit in Park. Run test with engine running (including Electric Range Extending Vehicle (EREV) configuration) at idle condition. 4.3.6 Limit airflow as much as the test facility is capable (nozzle fully retracted) and use a 1.2 m (4 ft) high x 2.4 m (8 ft) wide idle bo
20、ard positioned 1.8 m (6 ft) in front of test vehicle (to block any residual airflow and best simulate service garage environment). 4.3.7 Set test vehicle hood open and remain open for test. 4.3.8 Set test vehicle drivers door windows down 15 cm from full upward, set remaining windows full up. 4.3.9
21、Light bank should be raised, solar simulation lamps off as noted in 4.3.1. 4.3.10 Battery charger shall be connected to test vehicle to maintain battery voltage between 11.5 V and 12.5 V during testing. Measure battery voltage during all test points. 4.3.11 When test vehicle is equipped with mechani
22、cal engine cooling fan, use an operating fan clutch. When equipped with electric engine cooling fan systems, allow the vehicle to control fan speed. 4.3.12 Start the engine with A/C off. Bring the engine to operating temperature before each test point. 4.3.13 Stabilize the chamber to the data point
23、test condition defined in Table 1. 4.3.14 Set A/C to on and chiller coolant pump system on (when equipped) and close all doors at start of each test point. 4.3.15 Record all data every minute for a total of 10 minutes at each test point. 4.3.16 Leave vehicle running between test points and turn A/C
24、off. Direct airflow to Vent/Panel Mode and leave blower on HIGH. Continue to power the chiller coolant pump (when equipped) between points and ensure the A/C compressor remains off. All passenger doors are opened and allow 15 minutes of chamber stabilization after reaching new chamber conditions. Be
25、tween the 15th data point and the 16th data point, allow 30 minutes of stabilization time after reaching new ambient. 4.3.17 Repeat 4.3.13 thru 4.3.16 until test conditions shown in Table 1 are completed. 4.3.18 Record the temperatures, fan speed, voltage and service port pressure at the 4, 5 and 6
26、minute points in CG2310 as shown on Data Sheet A1 (electronic spreadsheet is to be used). 5 Data 5.1 Calculations. Calculations are completed in electronic spreadsheet CG2310. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. Test information and measuring data to be recorded in
27、 CG2310 file. Fill out CG2310 as described on Data Sheet A1 (template available in Excel document CG2310) following instructions in the worksheets, and then send CG2310 worksheet file to the Service Engineer in each marketing region. 6 Safety This standard may involve hazardous materials, operations
28、, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 G
29、lossary. Air Outlet Vents: The air outlet temperatures at each vent nozzle. Rear A/C outlets are A/C outlets designed to hit rear passengers only. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without l
30、icense from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15754 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 4 of 6 Full Cold: Setting the temperature control to the position that diverts the airflow interior to the HVAC module to bypass the heater core. Panel Outlets:
31、Air outlets that exit near the rearward face of the instrument panel. Test Temperature: The climatic chamber ambient conditions as defined per Table 1. 7.2 Acronyms, Abbreviations, and Symbols. A/C Air Conditioning EREV Electric Range Extending Vehicle HVAC Heating, Ventilation and Air Conditioning
32、I/P Instrument Panel PDT Product Development Team RH Relative Humidity RPM Revolutions per Minute VIN Vehicle Identification Number 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW15754 9 Release and Revisions This standard was originated
33、in December 2007. It was first approved by HVAC & PT Cooling GSILT in June 2008. It was first published in June 2008. Issue Publication Date Description (Organization) 1 JUN 2008 Initial publication. 2 AUG 2013 Five year refresh of standard. Document revised to note data is input into CG2310 spreads
34、heet. (Thermal Global System Integration Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15754 Copyright 2013 General Mo
35、tors Company All Rights Reserved August 2013 Page 5 of 6 Appendix A Data Sheet A1: Recorded Data (See Excel Spreadsheet Document CG2310 for Documentation) Vehicle Model Year/Make/Model/Body Style: VIN: Build Date: Test Lab: Test Vehicle Odometer Reading = kilometers or miles Test Number: Date: Test
36、Engineer: Driver Name: Describe Unusual Features of Test Vehicle: Describe Unusual Features of A/C System: Point Time (minutes) Ambient Temper-ature (Degrees C) Humid-ity (RH %) Mechan-ical Fan Speed (RPM) Right Fan Volt-age (V) Left Fan Volt-age (V) Battery Voltage (V) Left Front Center Panel Outle
37、t (Degrees C) Dis-charge Port Pressure (kPa) Suction Port Pressure (kPa) Left Rear A/C Outlets (Degrees C) 1 4 15.0 60.0 1 5 15.0 60.0 1 6 15.0 60.0 2 4 22.0 20.0 2 5 22.0 20.0 2 6 22.0 20.0 3 4 22.0 60.0 3 5 22.0 60.0 3 6 22.0 60.0 4 4 27.0 20.0 4 5 27.0 20.0 4 6 27.0 20.0 5 4 27.0 40.0 5 5 27.0 40
38、.0 5 6 27.0 40.0 6 4 27.0 60.0 6 5 27.0 60.0 6 6 27.0 60.0 7 4 32.0 20.0 7 5 32.0 20.0 7 6 32.0 20.0 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING S
39、TANDARDS GMW15754 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 6 of 6 Point Time (minutes) Ambient Temper-ature (Degrees C) Humid-ity (RH %) Mechan-ical Fan Speed (RPM) Right Fan Volt-age (V) Left Fan Volt-age (V) Battery Voltage (V) Left Front Center Panel Outlet (Degr
40、ees C) Dis-charge Port Pressure (kPa) Suction Port Pressure (kPa) Left Rear A/C Outlets (Degrees C) 8 4 32.0 40.0 8 5 32.0 40.0 8 6 32.0 40.0 9 4 32.0 60.0 9 5 32.0 60.0 9 6 32.0 60.0 10 4 38.0 10.0 10 5 38.0 10.0 10 6 38.0 10.0 11 4 38.0 30.0 11 5 38.0 30.0 11 6 38.0 30.0 12 4 38.0 60.0 12 5 38.0 6
41、0.0 12 6 38.0 60.0 13 4 43.0 10.0 13 5 43.0 10.0 13 6 43.0 10.0 14 4 43.0 30.0 14 5 43.0 30.0 14 6 43.0 30.0 15 4 49.0 15.0 15 5 49.0 15.0 15 6 49.0 15.0 16 4 32.0 40.0 16 5 32.0 40.0 16 6 32.0 40.0 Chart Notes: Column(s) need to be added to record fan motor voltage for each of the vehicles engine c
42、ooling fans (only two fans shown in chart). This is expected to be a common spreadsheet type file. The validation engineer is to provide the service engineer with the raw data upon request. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
