1、EUROPEENGINEERINGSTANDARDSTest Procedure GME17494Performance Evaluation of Seat Heating Systems Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 1 of 171 IntroductionNote: Nothing in this standard supercedes applicable laws and regulations.Note: In the event of conflict be
2、tween the English and domestic language, the English language shall takeprecedence.1.1 Purpose. This standard describes the evaluation of the performance of seat heating systems in the seatassembly.1.2 Applicability. To all seat heating system types.1.3 Remarks. This Test Procedure shall measure the
3、 seat heater mats temperature control behavior andheating characteristics during the heat-up curve (temperature over time) on seats in the climate chamber (single component) in the vehicle in the climate chamber in the vehicle during driving conditions (i.e., a road test).This standard shall also su
4、bjectively evaluate the seats in the vehicle to determine the overall Vehicle TechnicalSpecification (VTS) performance rating.Note: Tests with a single seat in a climate chamber are defined as a component test. Validation tests areconducted during the in-vehicle condition.Note: This standard is not
5、suitable for initial heater mat sampling tests.2 ReferencesNote: Only the latest approved standards are applicable unless otherwise specified.2.1 External Standards/Specifications.None2.2 GM Standards/Specifications.None2.3 Additional References.GM Serviceability Design Guidelines: GM handbook descr
6、ibing design methods and techniques to ensure thatthe operation of servicing GM vehicles is an efficient one.3 Resources3.1 Facilities.3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a validcalibration label.3.1.2 Alternatives. Alternative test faci
7、lities and equipment may also be used. However, all measuring variablesas specified in this standard shall be determined correctly with respect to their physical definition.3.1.3 Test lab with a temperature test chamber. The minimum requirements for the test chamber are describedin Table 1.GM EUROPE
8、 ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 2 of 17Table 1: Test Chamber RequirementsChamber RequirementTest Area (L x W x H) 2.0 m x 1.5 m x 2.0 mTemperature Range (-15 to +25) CTemperature Stability 2 CRelative Air Humidity (10 to 90)
9、 %Rate of Temperature Variation 1.5 C/minuteElectrical Connection Controllable3.2 Equipment.3.2.1 Portable, shock and climate resistant measurement system with a valid calibration label.Measurement computer must be capable of capturing the data described in Table 2.Table 2: Measured ValuesData Value
10、Temperatures (-15 to +60) CVoltages (0 to 20) VCurrents (0 to 20) AAcquisition Rate 1 Hz3.2.2 Laptop computer for interpretation of measured data.3.2.3 Adapter for measurement signal conversion (shunt).3.2.4 Sixteen (16) thermocouples for determination of the seat surface temperature, vehicle interi
11、or temperatureand ambient temperature.3.2.5 Voltage/current measurement module for measuring system.3.2.6 Thermography camera or infrared thermometer for the localization of the heating wires. The thermographycamera is required to perform the thermography picture of the heated surface distribution.3
12、.2.7 External battery or transformer for measurement computer power supply or adapter for onboard supplysystem.3.2.8 Stop watch or onboard computer timer function.3.3 Test Vehicle/Test Piece.3.3 Test Vehicle/Test Piece. A seat heater mat, which shall be tested and evaluated in the seat and vehiclety
13、pe for which it is intended. The vehicle electrical system shall be dimensioned for connection of seat heating.Note: If the same seat heater mat is utilized for different seat equipment and trim levels, the heater mat shall beevaluated and validated separately for each equipment level.3.4 Test Time.
14、 Test time is dependent upon the control design of the heater mat to be tested. Cumulative testtimes including data recording time are shown.Note: Winter sessions are preferred for vehicle tests.Calendar time: 1 dayTest hours:Objective Evaluation:Heat-up curve measurement for determination of the te
15、mperature levels = 1-2-3 MeasurementGM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 3 of 17 1 Stage Control: 45 minutes 3 Stage Control: 70 minutes 5 Stage Control: 110 minutesSubjective Evaluation and Measurement of heating perfor
16、mance under customer conditions =3-2-1 Measurement 1 Stage Control: 45 minutes 3 Stage Control: 90 minutes 5 Stage Control: 150 minutesCoordination hours: 10 h3.5 Test Required Information.3.5.1 The evaluation of the performance of the seat heating system shall be performed in the order described in
17、3.5.1.1 thru 3.5.1.3.3.5.1.1 Climate chamber test with single seats (component test).3.5.1.2 Vehicle test in the climate chamber or in comparable climate condition during driving operation.3.5.1.3 Subjective evaluation during driving operation.3.5.2 No vehicle test shall be performed until the resul
18、ts from a single seat test (component test) in the climatechamber are not according to specification.3.5.3 A subjective evaluation of the seat heating system in the vehicle during driving shall always be preferredto an evaluation in the climate chamber.3.5.4 Comfort evaluations in the climate chambe
19、r can only serve development purposes.3.6 Personnel/Skills.3.6.1 Tester. Test Engineer or lab technician with the proper training required to perform the seat heating testprocedure.Standard Tester:Weight: (75 5) kgHeight: (178 3) cm (178.6 cm equates to 50-percentile male in Germany)3.6.2 Comfort Ev
20、aluators. For subjective evaluation of comfort, five (5) individuals shall be chosen as arepresentative customer group. One (1) individual shall be of the standard size as described in 3.6.2.1. Theremaining four (4) comfort evaluators shall be of varying body measurements.3.6.3 Required Clothing. Je
21、ans, without long underwear. Cotton T-shirt. Light pullover (i.e., medium thick cotton or cotton mixed sweat shirt (250 to 300) g/m2).No jackets, no specific winter/ski wear, no belts or braces.Note: pay attention to double stitches and multiple layer (pockets)4 Procedure4.1 Preparation.4.1.1 Number
22、 of Temperature Measuring Points on the Seat.4.1.1.1 There shall be fourteen (14) thermocouples fixed onto the upholstered seat surface; seven (7) on theseat cushion and seven (7) on the seat back as shown in Figure 1.4.1.1.2 The fourteen (14) individual thermocouples shall each be soldered onto a p
23、iece of 15 mm x 15 mm(thickness of 0.2 mm) blackened copper foil.4.1.2 Location of Temperature Measuring Points on Seat and in Vehicle.4.1.2.1 Seat. Affix fourteen (14) thermocouples on the upholstered seat surface directly above the heating wireas shown in Figure 1 and described in Table 3.GM EUROP
24、E ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 4 of 17Note: For the exact determination of heating wire location during seat heating running (Figure 2), perform athermography survey or measure surface temperature with an infrared temperat
25、ure measuring unit.Should be a seam or stitches exist in the measurement area, then the temperature sensor shall be positionednext to this above the heating wire.4.1.2.2 Vehicle Interior Temperature. Install one (1) thermocouple in the vehicle interior at face level of thedriver. This thermocouple s
26、hall be used to measure the vehicle interior temperature.4.1.2.3 Ambient Temperature. Install one (1) thermocouple on the vehicle interior roof. This thermocouple shallbe used to measure ambient temperature.4.1.2.4 Temperature Sensor (optional). Install one (1) thermocouple directly on the heater wi
27、re in the vicinityof the temperature sensor. This thermocouple shall be used to obtain exact information on the control responseof the heater mat.4.1.3 Document Seat Surface Installation Positions.4.1.3.1 In order to have the ability of reproducing the test environment, the positions of the temperat
28、uremeasuring points on the heater wire shall be documented by means of a photo (preferred) or a drawing. Recordthe dimensions described in 4.1.3.1.1 and 4.1.3.1.2. Use Figure 1 as a guide.Note: For the determination of these values, the seat back shall be positioned vertically.4.1.3.1.1 Seat Surface
29、.4.1.3.1.1.1 Seat Surface Y. Distance of thermocouple from center line.4.1.3.1.1.2 Seat Surface X. Distance of thermocouple from seat rear edge.4.1.3.1.2 Back Surface.4.1.3.1.2.1 Back Surface Y. Distance of thermocouple from center line.4.1.3.1.2.2 Back Surface Z. Distance of thermocouple from seat
30、cushion surface.4.1.3.2 If several measurements are performed at the same seat level, the measuring positions shall bedetermined at the start of the measurement sequence. Measurement positions shall be reused maintaining atolerance of 10 mm.Figure 1: Thermocouple PositionsGM EUROPE ENGINEERING STAND
31、ARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 5 of 17Table 3: Thermocouple Position Location KeySeat Back1. Side bolster - tunnel (if heated) 8. Side bolster - tunnel (if heated)2. Front - tunnel 9. Bottom - tunnel (kidney area)3. Front - door 10. Bottom -
32、 door (kidney area)4. Side bolster - door (if heated) 11. Side bolster - door (if heated)5. Center - tunnel 12. Center - tunnel6. Center door 13. Center - back7. Rear - center 14. Center - doorFigure 2: Infrared View of Thermocouple Locations(example of cushion and complete heated seat)4.1.4 Connect
33、 Volt/Ampere Measurement Module. Connect the volt/ampere measuring module between theheater mat and the vehicle power supply to measure the applied voltage and the current consumption of theheater mat.4.1.5 Cool Seat before Testing. To assure a steady temperature of the seat before starting the eval
34、uation, theseat must be soaked at a test condition temperature of (-10 2) C for a time period as specified in 4.1.5.1 thru4.1.5.3.4.1.5.1 Seat in the vehicle with vehicle doors or windows open. Soak seat 5 h.4.1.5.2 Seat in the vehicle with closed vehicle doors and windows (closed condition). Soak s
35、eat 10 h.4.1.5.3 Single seat in the climate chamber. Soak seat 5 h.4.2 Conditions.4.2.1 Environmental Conditions.4.2.1.1 For Heat-up Curve Measurement with Single Seats or a Vehicle in a Climate Chamber. When testingsingle seats or a vehicle in a climate chamber, temperature of climate chamber shall
36、 be (-10 2) C.4.2.1.2 For Heat-up Curve Measurement during Driving Evaluation.4.2.1.2.1 Ambient Outside Temperature. When testing a vehicle outside, outside temperature should be in therange of (-10 3) C. When outside temperature is not in the range of (-10 3) C, the vehicle should be soakedin a cli
37、mate chamber (4.2.1.1) prior to the road test. When the vehicle shall be soaked in climate chamber,outside temperatures shall be If the temperature is too high switch to the next level.Seat cushionSeat backName:Body height (cm):Sex (m/f):Date:Test location:(pleasemark)Temperature distribution betwee
38、n cushion and backrestTemperature stabilityHeating performanceTemperature levelGM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 13 of 17GM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights Reserv
39、edNovember 2015 Page 14 of 17Data Sheet A2: Subjective Evaluation - Multi-Stage Temperature Control Seat Heating ComfortEvaluation (3-Stage)Carline/Vehicle-ID:Configuration: driver co-driver other:Trim level: fabric leather fabric/leatherSeat style: standard sport other:Environment: vehicle climate
40、chamberTest track: street climate chamberSample/Part No.:(please mark)First heat up impression noticeable after: too slow ly 12345 6 7 8 9 10 perfect : Min:SecFirst heat up impression noticeable on: cushion backrestTemperature distribution contact surface not harmonious 12345 6 7 8 9 10 harmoniousTe
41、mperature distribution contact surface not harmonious 12345 6 7 8 9 10 harmoniousTemperature distribution feeling uncomfortable 12345 6 7 8 9 10 comfortableMaximum temperature cushion too low 12345 6 7 8 9 10 9 8 7 6 54321too highMaximum temperature backrest too low 12345 6 7 8 9 10 9 8 7 6 54321too
42、 highAre the adjustment control cycles noticeable ? (switch on/off temperature regulation)noticeable 12345 6 7 8 9 10 not noticeableIs the temperature level constant (after heat-up phase, in regulatin)?inconstant 12345 6 7 8 9 10 constantTemperature distribution feeling uncomfortable 12345 6 7 8 9 1
43、0 comfortableMaximum temperature cushion too low 12345 6 7 8 9 10 9 8 7 6 54321too highMaximum temperature backrest too low 12345 6 7 8 9 10 9 8 7 6 54321too highAre the adjustment control cycles noticeable ? (switch on/off temperature regulation)noticeable 12345 6 7 8 9 10 not noticeableIs the temp
44、erature level constant (in regulation)?inconstant 12345 6 7 8 9 10 constantTemperature distribution feeling uncomfortable 12345 6 7 8 9 10 comfortableMaximum temperature cushion too low 12345 6 7 8 9 10 9 8 7 6 54321too highMaximum temperature backrest too low 12345 6 7 8 9 10 9 8 7 6 54321too highA
45、re the adjustment control cycles noticeable ? (switch on/off temperature regulation)noticeable 12345 6 7 8 9 10 not noticeableIs the temperature level constant (after heat-up phase, in regulation)?inconstant 12345 6 7 8 9 10 constantWhich level would you select for continous heating? 1. 2. 3. only h
46、eat upTotal rating seat heating 12345 6 7 8 9 10Temperature stability15-20 min after switch-onSeat Heating - Comfort Evaluation HFCno t co mmercial not co mmercialmust fixreview just right reviewClothing: no jacket!15-20 min after switch-onmust fixTemperature distribution between cushion and backres
47、tTemperature levelTemperature stabilitySeat cushionSeat backName:Body height (cm):Sex (m/f):Date:Test location:Outside temperature: _ C (pleasemark)3.Level(High)2.Level(Medium)1.Level(Low)Temperature distribution between cushion and backrestTemperature levelTemperature stabilityHeating performanceTe
48、mperature distribution on cushion and backrest 15-20 min after switch-on If the temperature is too high sw itch to the next level.Temperature distribution between cushion and backrestTemperature levelGM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNo
49、vember 2015 Page 15 of 17GM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 16 of 17Data Sheet A3: Example Measurement Diagram for Average Values (3 Stage Heater)GM EUROPE ENGINEERING STANDARDS GME17494 Copyright 2015 General Motors Company All Rights ReservedNovember 2015 Page 17 of 17Data Sheet A4: Example Measurement Diagram for 3-2-1 Measurement
