1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16869 Powertrain Compartment Acoustical Insulation Materials Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 1 of 9 1 Scope This specification describes the requirements for an engine compartment sound absorber (ECSA)
2、 used for noise control in the engine compartment. Note: Nothing in 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 Material Description. Materials shall be identified
3、by Types to identify material construction and properties. 1.2 Symbols. Not applicable. 1.3 Typical Applications. Where materials are required to control noise on the powertrain. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/S
4、pecifications. ANP 255 ASTM D3776 FMVSS 302 ISO 3386-1 ANP 310 ASTM D3801 ISO 354 SAE J1351 ASTM C423 ASTM D5034 ISO 845 SAE J1530 ASTM D975 ASTM D6751 ISO 1798 SAE J1681 ASTM D1117 ASTM E1050 ISO 1817 UL 94 ASTM D3574 2.2 GM Standards/Specifications. 9985010 B 040 0010 GM9200P GMW14729 9985074 B 04
5、0 0218 GMW3059 GMW16177 9985670 B 040 1068 GMW3232 GMW16181 9985946 B 040 1071 GMW3259 GMW16444 9986086 B 040 1073 GMW3356 GMW16522 9986117 B 040 1076 GMW3420 GMW16750 9986121 B 040 1370 GMW14124 HN1992 9986153 B 040 1990 GMW14194 HN2464 9986284 B 040 2030 GMW14334 L 000 0102 9986298 B 040 2071 2.3
6、Additional References. Part Number (P/N) 89021806 Part Number (P/N) 89021807 TMC003 Material Safety Data Sheet guidance documents (available at ). Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without l
7、icense from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16869 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 2 of 9 3 Requirements 3.1 Type A Fiberglass ECSA. The fiberglass construction shall consist of: 3.1.1 Fiberglass insulation core (per GMW14194 Type 2). 3.1.1.1 Surf
8、ace density. As low as possible to meet acoustic targets. a. Nominal: 810 g/m2 10%. b. Range: 610 g/m2 to 1200 g/m2. c. Design value: As specified on engineering drawing. 3.1.1.2 Color. Black (or dark gray, as approved). 3.1.1.3 Thickness. As thick as possible within packaging constraints. See part
9、drawing for specific geometry. 3.1.2 Facings (as required for appearance or dust irritant control). 3.1.2.1 Material. Nonwoven polyester or polyester/rayon blend (per GMW16522). 3.1.2.2 Color. Black (or dark gray, as approved). 3.1.2.3 Surface Density. As low as possible to meet acoustic targets. a.
10、 Range: 36 g/m2 to 68 g/m2 as specified on engineering drawing. 3.1.3 Edge Treatments (as required for dust irritant control). 3.1.3.1 Compressed Edges. Compressed to a maximum thickness of 3 mm, unless specified otherwise. 3.1.3.2 Edge Trimming. a. Pinched edges, preferred when possible. b. Water-j
11、et trimming, as required by geometric shape. 3.2 Type B Polyester ECSA. This construction shall consist of 100% polyester fibers, in a cut to shape, sheet configuration having the properties: 3.2.1 Color. Black (or dark gray, as approved). 3.2.2 Surface Density (per ASTM D3776). As low as possible t
12、o meet acoustic targets. a. Nominal: 370 g/m2 10%. b. Range: 320 g/m2 to 420 g/m2. c. Design value: As specified on drawing. 3.2.3 Thickness. Dependent on acoustical targets and packaging constraints. 3.2.4 Tensile Strength = 70 N minimum (machine and across machine direction) when tested per ASTM D
13、5034 grab method, 305 mm/minute jaw speed. 3.2.5 Tear Strength = 125 N minimum (machine and across machine direction) when tested per ASTM D1117, trapezoid method. 3.2.6 Wear Resistance = 300 cycles minimum when tested per SAE J1530. 3.3 Type C Polyester-Moldable ECSA. This construction consists of
14、a blend of several types of 100% thermoplastic polyester fibers having melt point differences which permit compression molding into parts with the properties: 3.3.1 Surface Density. As low as possible to meet acoustic targets. a. Nominal: 800 g/m2 10%. b. Range: 600 g/m2 to 1000 g/m2. c. Design valu
15、e: As specified on drawing. 3.3.2 Color. Black (or dark gray, as approved). 3.3.3 Thickness. As thick as possible within packaging constraints. See part drawing for specific geometry. 3.4 Type D Shoddy ECSA. This construction consists of synthetic resin bonded textile fiber fleece, compression molde
16、d core with an upper and lower facing having the general properties: 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 GMW16869 Copyright 2013
17、 General Motors Company All Rights Reserved May 2013 Page 3 of 9 3.4.1 Surface Density. As low as possible to meet acoustic targets. a. Nominal: 1250 g/m2 10%. b. Range: 1150 g/m2 to 1350 g/m2.c. Design value: As specified on drawing. 3.4.2 Facings. As required for appearance or dust irritant contro
18、l. a. Nonwoven polyamide 66, polyester or cellulose. 3.4.3 Color. Black on appearance side. 3.4.4 Edge Treatments. Trim edges heat sealed. 3.4.5 Thickness. As thick as possible within packaging constraints. See part drawing for specific geometry. 3.5 Type E Blended Synthetic Fiber Insulator ECSA. Th
19、is construction shall consist of a homogeneous mixture of synthetic fibers entangled or needled together into a random orientation. A sufficient percentage of thermoplastic fiber or thermo set resin is included in the blend to enable molding by a thermoforming process. A decorative facing may be req
20、uired per the part drawing. 3.5.1 Surface Density. As low as possible to meet acoustic targets. a. Nominal: 1000 g/m2 10%.b. Range: 800 g/m2 to 1200 g/m2.c. Design value: As specified on the part drawing. 3.5.2 Color. Black (or dark gray, as approved). 3.5.3 Thickness. As thick as possible within pa
21、ckaging constraints. See part drawing for specific geometry. 3.6 Type F Sheet Polyurethane Foam for ECSA. This construction shall consist of polyurethane foam laminated on one or both surfaces with either an aluminum foil, scrim facing, or both. 3.6.1 Polyurethane Foam Tested per ASTM D3574. a. Dens
22、ity: As specified on part drawing, per acoustical noise requirements. 3.6.2 Facings. a. Material: Non-woven polyester or polyester/rayon blend (per GMW16522). b. Color. Black (or dark gray, as approved). 3.6.3 Aluminum Foil. Foil thickness to be called out on part drawing. 3.7 Type G/H (low temperat
23、ure/high temperature) Cast Polyurethane Foam for ECSA. This construction shall consist of polyurethane foam that is cast (molded) into the desired geometry. Cast foam should be skinned on entire surface. Cast polyurethane foam tested per GMW16750, Type 1. 3.7.1 Density. Cast foam with density 120 kg
24、/m3 16 kg/m3 or as low as possible to meet acoustical targets. 3.7.2 Mechanical Properties per ASTM D3574-E. a. Tensile strength at break: 150 kPa minimum. b. Tensile strength at break after heat aging for 1000 h at 120 C: 80 kPa minimum. c. Elongation: 60% minimum. d. Tear Strength: 500 N/m minimum
25、. 3.8 Type I Melamine Foam for ECSA. This construction shall consist of melamine foam that is thermo-formable into a desired geometry. 3.8.1 Density. Formable foam with a density of 10 kg/m3 3 kg/m3 per ISO 845, or as low as possible to meet acoustical targets. 3.8.2 Mechanical Properties. a. Compre
26、ssive Strength: Minimum 4 kPa per ISO 3386-1. b. Tensile Strength: Minimum 55 kPa per ISO 1798. c. Elongation at break: Minimum 10% per ISO 1798. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without li
27、cense from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16869 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 4 of 9 3.9 Acoustical Performance. The acoustic performance of the ECSA shall comply with Table 1 and Table 2. Sound absorption may be determined by either, ASTM E10
28、50 Normal Incidence, or ASTM C423/ISO 354 Random Incidence as defined by part bulk area and packaging limited area thicknesses. (The intent of the “packaging limited“ properties is to allow for local compression where necessary, due to packaging constraints, with limit on reduced acoustic.) See Appe
29、ndix A, Figure A1 for sound absorption curves. Table 1: Normal Incidence Sound Absorption Coefficient, per ASTM E1050 at Defined Part Bulk Area and Packaging Limited Area Thicknesses Frequency Bulk Area (15 mm) Packaging-Limited Areas (6 mm) 250 0.05 0.02 315 0.09 0.05 400 0.14 0.08 500 0.2 0.1 630
30、0.26 0.13 800 0.32 0.18 1000 0.4 0.24 1250 0.5 0.34 1600 0.65 0.5 2000 0.75 0.6 2500 0.8 0.66 3150 0.82 0.72 4000 0.85 0.8 5000 0.82 0.82 Table 2: Random Incidence Sound Absorption Coefficient, per ASTM C423/ISO 354 at Defined Part Bulk Area and Packaging Limited Area Thicknesses Frequency Bulk Area
31、 (15 mm) Packaging-Limited Areas (6 mm) 250 0.07 0.03 315 0.13 0.07 400 0.2 0.14 500 0.28 0.2 630 0.36 0.26 800 0.43 0.34 1000 0.5 0.4 1250 0.64 0.5 1600 0.76 0.65 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking pe
32、rmitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16869 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 5 of 9 Frequency Bulk Area (15 mm) Packaging-Limited Areas (6 mm) 2000 0.8 0.7 2500 0.82 0.75 3150 0.82 0.78 4000 0.85 0.8 5000 0.82 0.8 3.10 Odor
33、(SAE J1351). The material must have an individual odor scale rating number of four or lower when tested per SAE J1351, as evaluated by a panel of six people. 3.10.1 Remove the jars from the oven and allow to cool to room temperature for a minimum of 15 minutes prior to evaluation. 3.11 Flammability.
34、 Only materials that have been deemed necessary to be V-0 capable shall be tested to 3.11.2 and will carry a V-0 suffix. All other materials shall meet the requirements of 3.11.1 (Reference GMW3232). 3.11.1 Horizontal Flammability Test. The material shall not burn or transmit a flame front across it
35、s surface at a rate more than 100 mm/minute when tested in accordance with GMW3232 (FMVSS 302), both as received and after accelerated aging (GM9200P). However, if a material stops burning before it has burned more than 60 s from the start of timing and has not burned more than 50.8 mm from the poin
36、t where timing was started, it shall be considered to meet this requirement. 3.11.2 Flammability V-0. All materials or layers of material within the defined part must comply with the Underwriters Laboratory (UL) 94-V-0 or ASTM D3801-V-0 flammability requirements. Materials requiring a V-0 rating (ex
37、cept polyurethane) shall retain that rating after 3000 h at 140 C. Note: Materials must be tested for compliance after 1000 h at 140 C, to avoid lengthy unnecessary testing. 3.11.2.1 V-0 flammability sheet polyurethane foam (Type F). If the polyurethane foam must meet UL 94 V-0 or ASTM D3801-V-0, th
38、en the following shall apply: a. Flammability rating: UL 94-V-0 optional ASTM D3801-V-0. b. Flammability after heat aging for 168 h at 150 C: UL 94-V-0 or ASTM D3801-V-0. c. Flammability after heat aging for 3000 h at 100 C: UL 94-V-0 or ASTM D3801-V-0. 3.11.2.2 V-0 flammability cast polyurethane fo
39、am (Type G-H). If the cast polyurethane foam must meet UL 94 V-0 or ASTM D3801-V-0, then the following shall apply: a. Flammability rating at 7 mm cross section thickness: UL 94-V-0 optional ASTM D3801-V-0. b. Flammability after heat aging for 168 h at 150 C at 7 mm: UL 94-V-0 or ASTM D3801-V-0. c.
40、Flammability after heat aging for 3000 h at 100 C at 7 mm: UL 94-V-0 or ASTM D3801-V-0. 3.12 Mildew (GMW3259). Required only if natural fibers are present in the construction. There shall be no visible growth or odor of mildew. 3.13 Humidity (GMW14729). Test after 500 h in humidity. Visually evaluat
41、e every 100 h. 3.14 Environmental Cycle (GMW14124). Run 10 cycles of GMW14124, Cycle G. 3.15 Resistance to Fluids. All materials shall be resistant to the media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. Table 3 d
42、efines typical requirements for such resistance to fluids, which apply or do not apply based on installation position. The part drawing shall call out the applicable items. Additional fluids, if applicable, shall be noted on the part drawing. 3.15.1 Standard Engine Compartment Resistance. If Standar
43、d is specified for Resistance to Fluids, the following fluids will be tested as found in Table 3: A, F, H, K, M, N, and P. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM W
44、ORLDWIDE ENGINEERING STANDARDS GMW16869 Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 6 of 9 Note: Other regional Original Equipment Manufacturer (OEM) initial fill equivalent liquids may be used per the discretion of the approving GM Engineer. Part shall be resistant to th
45、e liquids of the region the part is delivered to. 3.15.2 Fluids A, B, D to M, and O to Q: Test per GMW14334 X Rating 4, 24 h immersion time. 3.15.3 Fluids C and N: Test per GMW14334 B Rating 4. 3.15.4 Requirement. There shall be no color change, loss of bond, material degradation, or tackiness follo
46、wing the test. Table 3: Fluid Reference Table Fluid Description GMNA GME GMB GM Holden A Brake Fluid 9986121 (Department of Transportation (DOT) 3) 9986298 (modified DOT 3) L 000 0102 (DOT 4) GMW3356 DOT 4 B Battery Acid C Cleaning Agents Commercial Cleaning Agent per GMW14334 D Diesel Fuel 9985074
47、(Grade 1-D) B 040 0010 B 040 1076 (Factory Fill) Resolution ANP 310 B 040 0010 B 040 1076 (Factory Fill) E Diesel Test Fuel 80% Diesel fuel as per ASTM D975 S15 (15 ppm maximum Sulfur content; without BIODIESEL) + 20% Soy Methyl Ester Biodiesel per ASTM D6751 GMB only: Resolution ANP 255 F Engine Co
48、olant GMW3420 (DEX-COOL) G Engine Oil (Diesel Engines) GMW16177 (DEXOS 2) H Engine Oil (Gasoline Engines) GMW16181 (DEXOS) I Gasoline Fuel 9985946 (Non-oxygenated, Unleaded Regular) 9986086 (Oxygenated, Unleaded Regular) E85 B 040 1071 (Factory Fill) 9986086, but 20% ethanol by volume 9985946 (Non-o
49、xygenated, Unleaded Regular) 9986086 (Oxygenated, Unleaded Regular) E85 K Gasoline Test Fuel CE20 per SAE J1681 or 20% Bioethanol in Gasoline according to ISO 1817 Liquid 1 L Sodium Chloride Solution 1% by mass sodium chloride solution M Transmission Fluid 9986153 B 040 1068 (4 gear auto) B 040 1073 (5 gear auto) B 040 2030 (6 gear auto) B 040 2071 (manual) 9986153
