1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW14595 Horn Blow Effort and Location Test Copyright 2012 General Motors Company All Rights Reserved March 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope Note: Nothing in this standard supercedes applicable laws
2、and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. The purpose of this specification is to determine the effort required to activate the horn blowing mechanism, and to assure that this mechanism will ope
3、rate when a force is applied to all possible locations of the horn blowing actuator. 1.2 Foreword. Not applicable. 1.3 Applicability. This specification is applicable to steering wheels used in passenger cars, Multipurpose Passenger Vehicles (MPV) and trucks. 2 References Note: Only the latest appro
4、ved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW14095 2.3 Additional References. Testing Laboratory Records 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Test Equipment. 3.2.1.1 Temperature ch
5、amber capable of -30 3 C and 85 3 C. 3.2.1.2 Hand held ninety (90) Newton scale with a 12.75 2.00 mm diameter flat indenter to measure load. Note: Optional; Instron or similar tensile/compression tester with a 12.75 2.00 mm diameter flat indenter to measure load. 3.2.1.3 Signal Buzzer. 3.2.1.4 Fixtu
6、re to secure steering wheel/driver airbag/horn pad assembly at in vehicle column angle. Note: Optional; Fixture to secure steering wheel/driver airbag/horn pad assembly at horizontal angle. Note: All instrumentation is to be calibrated as required; record instrumentation details and date of calibrat
7、ion on Data Sheet A1, unless the information is otherwise preserved in the testing laboratory records. 3.3 Test Vehicle/Test Piece. Not applicable. 3.4 Test Time. Not applicable. Calendar time: days Test hours: hours Coordination hours: hours Copyright General Motors Company Provided by IHS under li
8、cense with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14595 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 2 of 5 3.5 Test Required Information. Not applicable. 3.6 Personne
9、l/Skills. Not applicable. 3.7 Development/Validation Items. 3.7.1 Test Material. Steering wheel assemblies with a representative Driver Airbag (DAB) Module/Horn Pad with horn blowing mechanism. 4 Procedure 4.1 Preparation. 4.1.1 Secure Steering wheel and driver airbag/horn pad assembly to holding fi
10、xture at nominal steering column angle. 4.1.2 Mark spots to be checked as per part print or as specified. 4.1.3 Attach the signal buzzer to the horn blowing mechanism. 4.1.4 Check all locations of the horn actuator for nonactuation. Record results. 4.2 Conditions. 4.2.1 Environmental Conditions. Not
11、 applicable. 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. 4.3 Instructions. 4.3.1 Using the 90 N scale or tensile/compression tester, apply a load per
12、pendicular to the surface of the horn pad (marked spots) at a rate that the load can be read accurately. 4.3.2 Record load of application at each spot when signal buzzes under the following conditions. Condition samples for 2 0.2 h before testing. 4.3.2.1 Test at room temperature conditions 23 5 C.
13、4.3.2.2 Test in temperature chamber at -30 3 C. 4.3.2.3 Test in temperature chamber at 85 3 C. Note: If moving components from temperature chamber to tensile fixture, all test locations shall be tested within three (3) minutes of removal from chamber. 4.3.2.4 Evaluation: Horn actuation effort requir
14、ements per GMW14095, see 3.2.1.5.3. 4.3.3 Optional Test Procedure. Using an Instron or similar tensile/compression tester with the steering wheel mounted horizontally to the base of the tester. 4.3.3.1 Apply a load perpendicular to the surface of the horn pad (marked spots) and record load when sign
15、al buzzes under the following temperature conditions. 4.3.3.1.1 Perform test at -30 3 C, +23 3 C, and +85 3 C. Samples shall be conditioned for 2 0.2 h prior to testing. Note: If moving components from temperature chamber to tensile fixture, all test locations shall be tested within three (3) minute
16、s of removal from chamber. 4.3.3.1.2 See 5.1 to calculate compensation factor to apply to results. 5 Data 5.1 Calculations. For optional horizontal test procedure (ONLY): Recorded results shall be corrected to compensate for effects of gravity, before comparisons to horn actuation effort requirement
17、s per GMW14095, see 3.2.1.5.3. 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 GMW14595 Copyright 2012 General Motors Company All Rights Res
18、erved March 2012 Page 3 of 5 Note: Compensation Instructions; use the formula in Figure 1 to calculate the value of X and then add X to recorded data for all locations. Record corrected data in Data Sheet A2. Figure 1: Calculation Formula 5.2 Interpretation of Results. Not applicable. 5.3 Test Docum
19、entation. Record pertinent test results on the supplied data sheets. 6 Safety This standard may involve hazardous materials, operations, 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
20、establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. DAB Driver Airbag MPV Multipurpose Passenger Vehicles 8 Coding System This standard shall be refer
21、enced in other documents, drawings, etc., as follows: Test to GMW14595 9 Release and Revisions This standard was originated in October 2005. It was first approved by the Steering Wheel Global Subsystem Leadership Team in March 2006. It was first published in March 2006. Issue Publication Date Descri
22、ption (Organization) 1 MAR 2006 Initial publication. 2 MAR 2012 5 Year Refresh, added optional procedure for Instron or similar tensile/compression tester. (Interiors) xaX =m( s in a ) ( 9 . 8 1 )X = c o mp en s a tio n f a c tor to b e a d d ed to h o r n ef f o r tsa =c o lu mn a n g lem=mo d u le
23、 / h o r n p a d ma s s in k il o g r a msCopyright 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 GMW14595 Copyright 2012 General Motors Company All
24、 Rights Reserved March 2012 Page 4 of 5 Appendix A Data Sheet A1: Instrument Calibration Report Number: _ Submit this data sheet with the other data sheets when the information is not otherwise preserved in the testing laboratory records. Test Procedure Number: GMW14595 Test Date: _ Instrument Descr
25、iption Instrument Number Calibration Date Next Calibration Due Date 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Recorded by: Date: (Signature) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted withou
26、t license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14595 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 5 of 5 Data Sheet A2 Horn Effort and Location Data Report/Test Number: Vehicle: Make Model Year Part Number: Description Experimental Production Prototype Test
27、 Data 4.1.4 Before Test Operation Comments (dead spots, etc.) Loads at Spots Specified at Room Temperature Conditions: 23 3 C: Location Number Reading (N) Optional Corrected (N) Loads at Spots Specified at: -30 3 C Location Number Reading (N) Optional Corrected (N) Loads at Spots Specified at: 85 3
28、C: Location Number Reading (N) Optional Corrected (N) Note: Show Calculations for Optional Procedure: X = compensation factor added to horn efforts. X(N) = (module mass(kg) x (sin a) x 9.81 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
