1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW3055 Evaporator Condensate Management Performance Validation for Passenger Vehicles Copyright 2011 General Motors Company All Rights Reserved June 2011 Originating Department: North American Engineering Standards Page 1 of 9 1 Scope Note: Nothing in
2、 this standard supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. Validate the vehicle evaporator condensate management performance under various static and dynamic conditions,
3、 as related to the vehicle passenger compartment. 1.2 Foreword. The test described herein shall only be performed where conditions allow for safe handling. The validation team has a choice between two equivalent tests: a bench test and a road test. The road test requires severe lane changes and U-tu
4、rns. Therefore proper precautions shall be taken to ensure the safety of the driver, passenger(s) and the general public so that they are not jeopardized when selecting the road test option. 1.3 Applicability. Front and/or rear passenger vehicle Air Conditioning (AC) systems. 2 References Note: Only
5、 the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW15845 3 Resources 3.1 Facilities. 3.1.1 Road Test. Relatively straight highway and a handling area with appropriate range to execute rapid acceler
6、ations and moderate speed turns. 3.1.2 Bench Test. Rain test chamber with the possibility to create a humid climate with a humidity ratio of 26 g/kg and lifting platform with adjustment facilities for lateral inclinations of 10 degrees and upgrades or downgrades of 15 3.2 Equipment. See GMW15845 reg
7、arding instrumentation requirements. 3.2.1 Temperature measuring and recording equipment for at least seven (7) measuring points. 3.2.2 Pressure measuring and recording equipment for at least two (2) points in the refrigerant circuit. 3.2.3 Measuring and recording equipment for compartment blower(s)
8、 voltage(s). 3.2.4 Measuring and recording equipment for the engine speed. 3.2.5 Measuring equipment for relative humidity. 3.2.6 Timing device with stopwatch functions. 3.2.7 Bench Test Only. 3.2.7.1 Device for operation and control of the engine acceleration pedal. 3.2.7.2 External fan/blower to e
9、nsure engine coolant stabilization. 3.3 Test Vehicle/Test Piece. Front and/or rear passenger vehicle air conditioning systems. 3.4 Test Time. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without licens
10、e from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 2 of 9 Calendar time: Not applicable Test hours: 9 hours on Road or 7 hours on Bench Coordination hours: Not applicable 3.5 Test Required Information. Not applicable. 3.
11、6 Personnel/Skills. 3.6.1 Road Test. One driver and one or two observer(s) 3.6.2 Bench Test. One operator 4 Procedure 4.1 Preparation. The vehicle or bench shall be prepared and equipped with devices according to paragraphs 3.2 and 4.3.1. Parts which obstruct the visibility of the A/C module and rel
12、ated ducts shall be removed. 4.1.1 Settings. The vehicle ventilation system controls shall be set to Full Cold, Production Outside Air Mode (P/OSA) for the entire test. The blower(s) switch position and mode will vary during the test. 4.2 Conditions. 4.2.1 Environmental Conditions. 4.2.1.1 Temperatu
13、re and Humidity Condition. Temperature and Humidity condition such that a humidity ratio of 20 g/kg minimum for a road test and 26 g/kg minimum for a bench test is maintained (see Appendix A). 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such
14、requirements shall be specified on component drawings, test certificates, reports, etc. 4.2.2.1 Road Test Roadway and Maneuvering Areas. Require a relatively straight highway with no grade for 45 km and a Parking area 0.75 km minimum long and 0.25 km minimum wide with no pedestrian or vehicle traffi
15、c. 4.2.2.2 Bench Test. Engine shall be set to idle at 1500 min-1 (1500 rpm) during the measurement period. 4.3 Instructions. 4.3.1 Measuring Values and Recorded Data. 4.3.1.1 Temperatures in C. Ambient. Refrigerant, before expansion device. Refrigerant, before rear expansion device (if applicable).
16、Refrigerant, evaporator-out. Refrigerant, rear evaporator-out (if applicable). Center A/C outlet. Rear A/C outlets (if applicable). 4.3.1.2 Pressure in kPa. Low side pressure at service port. High side pressure at service port. 4.3.1.3 Further Specific Measuring Values. Engine speed in min-1 (rpm).
17、Relative humidity in percent (%). Blower Voltage. 4.3.1.4 Further Data. Vehicle data, mileage and description of the system to be validated. Test number, date and time (time for road test only). Name of the person in charge of the test and the observer(s). List of calibrated test equipment. Copyrigh
18、t 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 GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 3 of 9 4.3.2 Road T
19、est Description 4.3.2.1 Straight, Level Highway Analysis with U-turns, A/C Outlet Mode. Run vehicle at a speed of 80 km/h for 30 minutes in high blower. Look for airborne water out of all outlets during this period. 4.3.2.1.1 Slow vehicle down to a speed of 25 km/h. When safe, make a hard U-turn to
20、the left. Observe system for condensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.2.1.2 Resume straight ahead travel at a speed of 80 km/h for 15 minutes. 4.3.2.1.3 Slow vehicle down to a speed of 25 km/h. When safe make a hard U-turn to the right. Observe system for co
21、ndensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.2.1.4 Resume straight ahead travel at a speed of 80 km/h for 15 minutes. Apply brakes moderately hard; i.e. rapid stop, short of squealing tires. Observe system for condensate dripping from the outlets, ducts, and case
22、seals where appropriate. 4.3.2.1.5 From this stop, make a Wide Open Throttle (WOT) start to a speed of 80 km/h. Observe system during acceleration. 4.3.2.1.6 Stabilize at a speed of 80 km/h for 15 minutes, maintaining high blower. Observe system for condensate dripping from the outlets, ducts, and c
23、ase seals where appropriate. 4.3.2.1.7 Slow to a stop, then make a WOT start to a speed of 80 km/h. Observe system for condensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.2.1.8 Stabilize at a speed of 80 km/h, low blower for 15 minutes. Then switch to high blower and o
24、bserve system for condensate dripping from the outlets, ducts, and case seals where appropriate, for two (2) minutes. 4.3.2.1.9 Repeat above test sequence as described in paragraph 4.3.2.1 a minimum of three (3) times. 4.3.2.2 Parking Area Analysis with U-turns (for A/C Systems with Independent A/C
25、Compressor On Switch only) at Defrost, Defog (Blend) and Heater Mode. Select a Mode. Idle the vehicle at low blower for 15 minutes. Accelerate rapidly to 25 km/h. Change blower switch from low to high setting. Initiate a hard U-turn to the right. Observe system for condensate dripping from the outle
26、ts, ducts, and case seals where appropriate. 4.3.2.2.1 Idle vehicle at low blower for 15 minutes. Accelerate rapidly to 25 km/h. Change blower switch from low to high setting. Initiate a hard U-turn to the left. Observe system for condensate dripping from the outlets, ducts, and case seals where app
27、ropriate. 4.3.2.2.2 Repeat above test sequence as described in paragraph 4.3.2.2 a minimum of three (3) times in the above described mode positions. 4.3.2.3 Straight, Level Highway Analysis with Severe Lane Changes. A/C Outlet Mode. Stabilize vehicle at a speed of 80 km/h at low blower. Hold this co
28、ndition for 15 minutes. Execute a moderately severe lane change to the left. Observe system for condensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.2.3.1 Stabilize vehicle at a speed of 80 km/h for additional 15 minutes. Execute a moderately severe lane change to the r
29、ight. Observe system for condensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.2.3.2 Stabilize vehicle at a speed of 80 km/h for additional 15 minutes. Slow vehicle gently to a stop. Back the vehicle up slowly to a speed of 5 km/h with minimal acceleration. Apply brakes.
30、 Observe system for condensate dripping from the outlets, ducts and case seals where appropriate. 4.3.2.3.3 Repeat above test sequence as described in paragraph 4.3.2.3 a minimum of three (3) times. 4.3.3 Bench Test Description. 4.3.3.1 Gradient and Inclination Variation on the Bench. The entire tes
31、t shall be performed in the A/C mode with all outlets open. See Table 1 regarding specific test parameters. 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 ENGINE
32、ERING STANDARDS GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 4 of 9 Table 1: Vehicle Test Conditions Section Blower Voltage Test Time (minutes) Gradient Degrees Inclination Degrees 1 Max 30 0 0 2 Low/1 60 0 0 3 Max 10 0 +10 4 Low/1 30 0 +10 5 Max 10 0 -10 6 Low/1
33、30 0 -10 7 Max 10 +15 0 8 Low/1 30 +15 0 9 Max 10 +15 +10 10 Low/1 30 +15 +10 11 Max 10 +15 -10 12 Low/1 30 +15 -10 13 Max 10 -15 0 14 Low/1 30 -15 0 15 Max 10 -15 +10 16 Low/1 30 -15 +10 17 Max 10 -15 -10 18 Low/1 30 -15 -10 Note: Change blower control switch from low to high setting before the cha
34、nge of vehicle orientation. Look for airborne water out of all outlets during this period. Observe system for condensate dripping from the outlets, ducts, and case seals where appropriate. 4.3.3.2 Condensate Spillage. Idle the vehicle with 1500 min-1 (1500 rpm) in normal orientation (without gradien
35、t and inclination). Stabilize 15 minutes in low blower, then turn the blower off for 15 minutes, then quickly change to high blower. Look for water drops coming from the air outlets. 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. The Targets are defined in the Vehicle Techni
36、cal Specification (VTS). 5.3 Test Documentation. With reference to this test procedure the results of the measurements shall be presented in a test report. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety prob
37、lems 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. Copyright General Motors Company Provided by IHS under license with General Motors CompanyN
38、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 5 of 9 7 Notes 7.1 Glossary. P/OSA: A customer selectable air inlet mode resulting in the maximum inta
39、ke of outside air. 7.2 Acronyms, Abbreviations, and Symbols. A/C Air Conditioning N/A Not Applicable P/OSA Production Outside Air Mode VTS Vehicle Technical Specification WOT Wide Open Throttle 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to
40、GMW3055 9 Release and Revisions This standard was originated in April 1998. It was first approved by the GM Global Document Approval Team in February 2000. It was first published in February 2000. Issue Publication Date Description (Organization) 1 FEB 2000 Initial publication. 2 JUN 2011 Added Benc
41、h Test Option (HVAC and Powertrain Cooling) 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 GMW3055 Copyright 2011 General Motors Company Al
42、l Rights Reserved June 2011 Page 6 of 9 Appendix A Figure A1: Psychometric Chart for Humid Air Minimum testcondition100%50%90%80%70%60%40%30%20%15%12g/kg14g/kg16g/kg18g/kg20g/kg22g/kg24g/kg26g/kg28g/kg30g/kg32g/kgHumidtityratioRel.Humidity24C26C28C30C32C34C36C38C40C42C44C46C48C50C52C54CTemp.Mollier-
43、h-x-diagramfor humidair - Pressure1.013bar(0.0m/20.0C/50.0%r.F.)B E N C H T E S TR OA D T E S TCopyright 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 STANDAR
44、DS GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 7 of 9 Appendix B Figure B1: Vehicle Installation on the Bench Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without l
45、icense from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 8 of 9 Appendix C Data Sheet C1: Bench Test Test Number: Test Date: Ambient Temperature in C: Relative Humidity in (%): Absolute Humidity in g/kg: Tested By: Remark
46、s: Section Start End Blower Voltage Gradient Degree Inclination Degree Result/remarks 1 0 30 minute High 0 0 2 30 minute 1h and 30 minute Low 0 0 3 1h and 30 minute 1h and 40 minute High 0 10 4 1h and 40 minute 2h and 10 minute Low 0 10 5 2h and 10 minute 2h and 20 minute High 0 -10 6 2h and 20 minu
47、te 2h and 50 minute Low 0 -10 7 2h and 50 minute 3h High 15 0 8 3h 3h and 30 minute Low 15 0 9 3h and 30 minute 3h and 40 minute High 15 10 10 3h and 40 minute 4h and 10 minute Low 15 10 11 4h and 10 minute 4h and 20 minute High 15 -10 12 4h and 20 minute 4h and 50 minute Low 15 -10 13 4h and 50 min
48、ute 5h High -15 0 14 5h 5h and 30 minute Low -15 0 15 5h and 30 minute 5h and 40 minute High -15 10 16 5h and 40 minute 6h and 10 minute Low -15 10 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 GMW3055 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 9 of 9 Appendix D Data Sheet D1: Road Test Vehicle Number: Vehicle Details: Test Number: Test Date and Time: Ambient Temperature Range
