1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW3037 Air Conditioning System Maximum Performance Validation for Passenger Vehicles Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 1 of 10 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. N
2、ote: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. Provide validation of the maximum performance capability of a vehicle Air Conditioning (AC) system by reproducible measurements in a climatic wind tunnel. 1.2 Foreword. N
3、ot applicable. 1.3 Applicability. Apply for all passenger vehicles with an AC system. 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. None
4、 3 Resources 3.1 Facilities. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard sh
5、all be determined correctly with respect to their physical definition. 3.1.3 Climatic wind tunnel including a chassis dynamometer with adjusting possibilities for a vehicle speed of 110 km/h minimum, a wind speed of 110 km/h minimum, an ambient temperature of +50 C minimum and a relative humidity of
6、 80% minimum. 3.1.4 Capability of solar radiation simulation with a power of 1100 W/m2. 3.2 Equipment. 3.2.1 General. 3.2.1.1 Temperature, pressure, speed, humidity, voltage and current measuring and recording equipment as described in Appendix A. 3.2.1.2 Device for operation and adjustment of accel
7、erator pedal. 3.2.1.3 Battery charger to maintain battery during warm-up may be required (see 4.2.2.1.1). 3.3 Test Vehicle/Test Piece. Passenger vehicle equipped with an AC system. 3.3.1 Exterior Color. A dark exterior color produces more solar load than a light exterior color. Use engineering judgm
8、ent to select a worst case consumer experience using a dark exterior hue. Black exterior color is not a test requirement. White exterior color is not acceptable. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking perm
9、itted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3037 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 2 of 10 3.3.2 Vehicle Camouflage. Camouflage used to disguise the vehicle during development can impact both solar loading and grille airflow. Engin
10、eering judgment should be used to make a decision to test with or without camouflage. 3.3.3 Vehicle Condenser Radiator and Fan Module (CRFM). The vehicle CRFM and powertrain configuration impact AC performance. Use engineering judgment to select a representative mainstream customer configuration. 3.
11、4 Test Time. Preparation time; plus five hours for each Cycle 1, three hours for each Cycle 2 and four hours for each Cycle 3 (See 4.3.2). 3.5 Test Required Information. Test conditions are as specified in this procedure unless specified by the Vehicle Technical Specification (VTS). 3.5.1 Dynamomete
12、r Load. The United States Environmental Protection Agency (EPA) test weight shall be used to determine the road load dynamometer setting for the various roll speeds as required. 3.5.2 Acceleration and Deceleration. 3.5.2.1 Accelerate: 50 km/h to 100 km/h Acceleration 3.0 km/h/s. 3.5.2.2 Decelerate:
13、100 km/h to 0 km/h Deceleration 2.0 km/h/s. 3.6 Personnel/Skills. Require one climatic tunnel operator and one driver (if necessary). 4 Procedure 4.1 Preparation. The vehicle shall be prepared for the climatic tunnel and shall be equipped with devices according to 3.2 and 4.3.3. Automatic systems ma
14、y require additional equipment to override air inlet selection. GMW15845 - Test Vehicle Instrumentation Procedure shall be utilized to define specific instrumentation methods. 4.1.1 Settings. For automatic and manual systems, the vehicle ventilation front (and rear, if equipped) system controls shal
15、l be set to AC outlet mode, maximum cold temperature and maximum blower speed. Deviations are described in the following paragraphs. 4.1.1.1 Sunroofs are to remain closed at all times and sun shades (if equipped) deployed to minimize the cabin solar load (this is the expected customer hot weather op
16、erating mode). 4.1.1.2 All ventilation outlets are to remain open and the panel vent nozzles shall be adjusted in such a way that the main air flow of each nozzle is directed towards the closest occupant shoulder horizontally and vertically to a line 200 mm below breath temperature sensors. Rear coo
17、ling outlets, if present, positioned to deliver airflow 200 mm directly below the breath temperature sensor. Vents shall not be adjusted during the remainder of the test. 4.1.1.3 Chillers for battery and/or power electronics cooling shall be set to operate as expected for appropriate ambient operati
18、on. Note: Automatic systems are operated like manual systems. Be sure the air inlet mode can be switched during the Cycle 1 test to full Outside Air (OSA) mode (0 percent recirculation). Some vehicles provide partial recirculation of airflow in the customer selectable OSA mode or Production Outside
19、Air Mode (P/OSA), which is not acceptable for this test. Full OSA mode data collection is used for refrigeration system sizing. Rear climate systems shall be operated as expected for all passenger seats occupied. 4.2 Conditions. 4.2.1 Environmental Conditions. 4.2.1.1 Ambient. Test Temperature: +38
20、1 C for Cycle 1 and Cycle 2, and +50 1 C for Cycle 3. Relative Humidity: 40% for Cycle 1 and Cycle 2, and 20% for Cycle 3. Sun Load: 1000 W/m2 (measured in the center of vehicle roof). Note: Different conditions may be described in the corresponding VTS. 4.2.2 Test Conditions. Deviations from the re
21、quirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.2.2.1 Vehicle Conditioning. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction
22、or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3037 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 3 of 10 4.2.2.1.1 Warm-up. Warm-up is not necessary if the temperature of the body mass (seat rail) is within 15 C of the test tem
23、perature (See GMW15845 regarding seat rail thermocouple location). 4.2.2.1.1.1 The engine shall be idling (running) in Park or Neutral. The AC compressor is not to run. The Heating, Ventilation and Air Conditioning (HVAC) module must be at a full cold temperature setting. Note: If an automatic contr
24、ol system forces the AC compressor on or moves the temperature door travel away from full cold, the engine shall remain off. Table 1: Warm-up Wind Speed Optional Temperature 38 C Cycle 1 and 2, 50 C Cycle 3 Engine On, (see 4.2.2.1.1.1) Front Blower Customer selectable speed closest to 8 V Battery Co
25、nnected to charger if engine remains off, (see 4.2.2.1.1.1) Windows Optional down HVAC Mode A/C Panel Mode, Air Inlet P/OSA HVAC Temperature Full cold, AC off Sun Load Optional Time Until the temperature of the body mass (e.g., seat rail) is within 10 C of the test ambient temperature. Table 2: Pre-
26、Soak Wind Speed 50 km/h Temperature 38 C Cycle 1 and 2, 50 C Cycle 3 Humidity 40% RH Cycle 1 and 2, 20% RH Cycle 3 Engine On, (see 4.2.2.1.1.1) Compressor Off Front Blower See Table 1 Windows Open HVAC Mode A/C Panel Mode (see Note), Air Inlet P/OSA HVAC Temperature Full cold, AC off Sun Load Off Ti
27、me 30 minutes Note: Cycle through defrost and heater mode to purge the HVAC module of conditioned air prior to the selection of AC panel mode. It may be necessary to move the ignition to “run” to obtain the needed change in air inlet door mode during this or any future mode change when the vehicle i
28、s otherwise not running. Table 3: Solar Soak Conditions Wind Speed As required to maintain test conditions (e.g., 5 to 8 km/h) Temperature 38 C Cycle 1 and 2, 50 C Cycle 3 Humidity 40% RH Cycle 1 and 2, 20% RH Cycle 3 Engine Off Front Blower Off Windows Closed HVAC Mode A/C Panel Mode Air Inlet mode
29、 Production Recirculation Mode (P/R) Sun Load On (see 4.2.1.1) Time 60 minutes (see Note) 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 GM
30、W3037 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 4 of 10 Note: Time: Depending on the installed sun simulation equipment, the time shall be defined as the equivalent period, 50 minutes, to reach the same soak average breath temperature results as obtained with natural
31、sun load of 1 h at 1000 W/m2 (or as specified by the corresponding VTS) at test temperature. 4.2.2.2 Idle Conditions. The wind speed in front of the radiator shall be 0 km/h. 4.2.2.3 Electrical Power Supply. All electrical systems are supplied by the internal vehicle power supply. The battery shall
32、be fully charged before the test with an allowable exception to maintain an agreed upon desired State of Charge (SOC) on a hybrid propulsion system. The blower speed (voltage) is defined by the corresponding VTS (Default Front High, Rear High). 4.3 Instructions. 4.3.1 Gear Step or Drive Positions. T
33、able 4: Gear Step or Drive Positions Speed Transmission 50 km/h 80 km/h 110 km/h Idle Manual Transmission 4 Speed 4 4 4 Neutral Manual Transmission 5 Speed 4 or 5 Note 1 5 5 Neutral Manual Transmission 6 Speed 4 or 5 Note 1 5 or 6 Note 2 6 Neutral Automatic Transmission D (Highest Drive Gear) D (Hig
34、hest Drive Gear) D (Highest Drive Gear) D (Highest Drive Gear) Note 1: Use 5th gear (exception: use 4th gear when engine displacement is less than 2.3 L and engine speed in 4th gear is less than 1900 min-1 (1900 rpm). Note 2: Use 6th gear (exception: use 5th gear when engine displacement is less tha
35、n 2.3 L and engine speed in 5th gear is less than 1800 min-1 (1800 rpm). 4.3.1.1 The specified vehicle speeds are driven at road load (on level stretches without acceleration). 4.3.1.2 For repeat measurements on vehicles with automatic transmissions, it shall be ensured that same vehicle speeds are
36、driven at the same lowest engine speeds. 4.3.1.3 For manual transmissions, gears shall be changed as follows: Idle drive away: shifts at 1000 min-1 (1000 rpm) less than red line. Other shifts at 3000 200 min-1 (3000 200 rpm). 4.3.2 Climatic Tunnel Cycles. Table 5: Climatic Tunnel Cycle One (Global D
37、efault Schedule) Cycle Time Warm-up Variable (see Table 1) OSA Pre-soak 30 minutes (see Table 2) P/R Soak approximately 60 minutes (see Table 3, clock to Zero after this event) 50 P/R 20 minutes (20 minutes total) 80 P/R 20 minutes (40 minutes total) 50 OSA 20 minutes (60 minutes total) 80 OSA 20 mi
38、nutes (80 minutes total) Idle P/R 30 minutes (110 minutes total) 110 OSA 20 minutes (130 minutes total) IDLE OSA 30 minutes (160 minutes total) Quickly to 110 OSA 2 minutes (162 minutes total) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo
39、reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3037 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 5 of 10 Table 6: Climatic Tunnel Cycle Two (Soak to Idle Schedule) Cycle Time Warm-up Variable (see Table 1) OSA Pre-
40、soak 30 minutes (see Table 2) P/R Soak approximately 60 minutes (see Table 3, clock to Zero after event) Idle P/R 30 minutes (30 minutes total) Table 7: Climatic Tunnel Cycle Three (Extreme Climate Schedule) Cycle Time OSA Presoak 30 minutes (see Table 2) P/R Soak approximately 60 minutes (see Table
41、 3, clock to Zero after this event) 50 P/R 20 minutes (20 minutes total) 80 P/R 20 minutes (40 minutes total) Idle P/R 35 minutes (75 minutes total) Quickly to 110 P/R 2 minutes (77 minutes total) 4.3.3 Measuring Values and Data to Record. All data (see Appendix A) shall be recorded at intervals of
42、maximum 30 s. To capture the surges in the head pressures, scan rate shall be increased to 1 s intervals for the 110 km/h (OSA) drive away after the 160 minute mark in the test. In addition, a single shot data point shall be taken at the end of each speed segment during the course of the test. 4.3.3
43、.1 Further Data. Vehicle Data, mileage, color, and description of the climate system to be tested. Record any vehicle camouflage installed during the test, particular notes to address any glass blockage caused by camouflage, and note the presence or lack of presence of a sunroof and sunroof shade as
44、 well as the deployment of a shade during the test. Test Number and Date. Name of the Person in Charge of the Test and the Driver (if applicable). List of Calibrated Test Equipment. 4.3.4 Test Description Cycle 1. Warm-up the vehicle by using the solar light bank or modulating wind speed until the v
45、ehicle mass (seat rail) has reached the test temperature as described in Table 1. 4.3.4.1 Pre-soak the vehicle for 30 minutes as described in Table 2. 4.3.4.2 At the completion of the pre-soak, change air inlet mode from OSA to P/R and then shut the engine off for vehicle soak. Soak time starts afte
46、r the tunnel operator returns to the control room. 4.3.4.3 Soak the vehicle as described in Table 3. 4.3.4.4 After the soak is complete the driver enters the vehicle and switches the compressor and the blower fan to on. Blower settings per VTS (default is High 14 V - all blowers). Then the driver st
47、arts the engine. This is t = 0 minutes. Note: If necessary the driver can stay in the vehicle (for speed adjustment and gear changing), but it is recommended that the tunnel operator make all adjustments. Note: Engine start is t=0. The vehicle shall accelerate to the test speed shown in Table 5 with
48、in 60 s of t=0. 4.3.4.5 Test the vehicle as shown in Table 5. 4.3.4.5.1 Accelerate vehicle to 50 km/h and maintain speed for 20 minutes. 4.3.4.5.2 After recording data, accelerate vehicle to 80 km/h and maintain for 20 minutes. 4.3.4.5.3 After recording data, decelerate vehicle to 0 km/h to allow th
49、e operator to enter the vehicle and shift air inlet mode to OSA. After the operator comes back to the control room, accelerate the vehicle to 50 km/h and maintain speed for 20 minutes. Note: Time taken by the operator to change the air inlet mode should not be greater than 60 s after achieving 0 km/h. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo repr
