1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW14276 Closure Panel Release Handle Release Force Measurement Copyright 2012 General Motors Company All Rights Reserved January 2012 Originating Department: North American Engineering Standards Page 1 of 9 1 Scope Note: Nothing in this standard super
2、cedes 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. To measure the force required to operate a body system closure panels remote release mechanism. 1.2 Foreword. In order to determin
3、e standardized measurements of release forces for different vehicles and handles, it is necessary to specify a measurement procedure, which can be performed properly, easily and accurately. This test procedure is intended to simulate the method that a customer would use to operate a remote release h
4、andle. The quasi-static force is applied in the direction that the handle is designed to be used by the customer. 1.3 Applicability. For all passenger vehicles equipped with a release handle for Hoods, Decklids, Liftgates, Midgates, Endgates or Fuel Doors. 2 References Note: Only the latest approved
5、 standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. Use the following program specific documents. Decklid Subsystem Technical Specifications (SSTS) Endgate SSTS FESM SSTS Liftgate SSTS Midg
6、ate SSTS 3 Resources 3.1 Facilities. The test facilities and test equipment shall be in good working order and shall have a valid calibration label. Alternative test facilities and test equipment may also be used. However, all measuring variables as specified in this specification shall be determine
7、d correctly with respect to its physical definition. 3.2 Equipment. 3.2.1 Handheld Tensile/compression force gage with hook and a measuring range of 1.5 times the relevant SSTS specification. 3.2.2 Adaptation for Release Lever. The adaptation should be designed such that the force gage hook can enga
8、ge it without binding or otherwise causing unintended moments. 3.2.3 Angle measuring device (level gage). 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 ENGINEER
9、ING STANDARDS GMW14276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 2 of 9 3.2.4 Any other instrumentation deemed necessary. 3.3 Test Vehicle/Test Piece. An appropriate buck, body or vehicle, with a design intent closure panel system is required to perform this test. N
10、ote: All hardware and system components should be present due to the possible effects of seals, overslam bumpers, counterbalance mechanisms, etc. 3.4 Test Time. Note: These time estimates are approximate averages. Actual times vary considerably depending on early component failures (and subsequent a
11、vailability of replacement parts), testing to varying multiples of cycle lives, varying requirements for frequency of environmental test conditions, scheduling problems for test facilities, test equipment malfunctions, scheduling of overtime and/or multiple shifts, scheduling of “witnesses” for test
12、s, actual readiness of test samples upon receipt, unique or additional requests for detailed test information, running multiple samples (times shown are for one (1) system), etc. Calendar time: 1 day Test hours: 2 hours Coordination hours: 5 hours 3.5 Test Required Information. The requesting engine
13、er is responsible for providing specifications appropriate to the particular vehicle line being tested (reference Vehicle Technical Specifications (VTS)/SSTS paragraph numbers if applicable). 3.5.1 Location of force application on handle assembly. 3.5.2 Direction/arc of force application. 3.5.3 Mini
14、mum and/or maximum allowable operating effort requirement(s). 3.5.4 Environmental Conditions. 3.6 Personnel/Skills. It is emphasized that the performance of measurements always requires a certain degree of technical knowledge in order to produce consistent results. Prior experience in setting up and
15、 running similar tests and experience in the use of the referenced test equipment are critical to achieving the estimated times shown in “3.4 Test Time“. 4 Procedure 4.1 Preparation. 4.1.1 Sample Inspection. The actual condition of the closure release and the corresponding latching system (if purely
16、 mechanical system) shall be checked and corrected to nominal condition or drawing condition, if necessary. For mechanical systems, the closure shall be latched in the primary engagement position. The closure bumpers/buffers shall be adjusted to the correct height, in accordance with the drawing. If
17、 present, in the vehicle to be measured, the release cable shall be checked for proper condition as well as proper position and function. It is recommended that the test parts/assembly be dimensionally certified before testing is started. 4.1.2 Sample Preparation. Operate the system five (5) times (
18、unlatch with handle, open the closures, shut the closure and then ensure that the latch has re-engaged the primary). Verify that all weatherstrips, seals, bumpers etc., lose their green strength by allowing the system to remain closed and latch for approximately 12 h. 4.1.3 Equipment Preparation. Re
19、cord the instrumentation calibration information on Data Sheet B1 in Appendix B or an equivalent document. 4.1.4 Testing. The function of the closure release lever shall be tested by means of repeated unlatching, by pulling the release lever in the vehicle accompanied by subsequent re-latching of th
20、e closure. 4.2 Conditions. 4.2.1 Environmental Conditions. The measurements typically are performed under the following ambient conditions: Temperature +23 5 C Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permit
21、ted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 3 of 9 Relative Humidity of 40% +20% Atmospheric pressure equivalent to the local barometric pressure (which is variable during any given day and f
22、rom day to day). The ambient conditions shall not change significantly during the measurement: (T 5 C). Measurements shall be performed on the stationary vehicle. Note: This procedure can also be tested at any other environmental condition as required by the relevant SSTS. If tests are conducted at
23、non-ambient conditions, indicate so on the data sheet. 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. All deviations must be recorded on Data Sheet A2 i
24、n Appendix A. 4.3 Instructions. There are two (2) typical types of release handles: Rotational Levers and Linear Handles. 4.3.1 Install the Adaptation and Connect Force Gage. The orientation of the tensile/compression force gage shall be such that it simulates the direction of force application that
25、 the customer must use to actuate the handle. This is typically tangential to swing or parallel to travel and perpendicular to the surface which the customer grasps the handle. The load should be applied (through an adaptation if necessary) such that the leverage arm of the force gage originates thr
26、ough a point that is centered on the finger grip area of the release handle. 4.3.1.1 Rotational Lever Adaptations and Connections. In order to standardize the measurements, the adaptation, which may be provided with an eyelet or similar interface, shall be attached to the release lever before testin
27、g. The hook of the tensile/compression gage shall be inserted into this eyelet (see Figure 1) or directly to the finger/handle position (see Figure 2) if feasible. Figure 1: Adaptation Orientation and Release Force Measurement with a Rotational Release Lever Copyright General Motors Company Provided
28、 by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 4 of 9 Figure 2: Direct Attachment with a Rotati
29、onal Release Lever 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 GMW14276 Copyright 2012 General Motors Company All Rights Reserved Januar
30、y 2012 Page 5 of 9 4.3.1.2 Linear Handle Adaptations and Connections. In order to standardize the measurements, the adaptation, which may be provided with an eyelet or similar interface, shall be attached to the release lever before testing. The hook of the tensile/compression gage shall be inserted
31、 into this interface (see Figure 3) or directly to the finger/handle position (See Figure 4) if feasible. Figure 3: Adaptation Orientation and Release Force Measurement with a Linear Pull Handle Figure 4: Direct Attachment with a Linear Pull Lever Copyright General Motors Company Provided by IHS und
32、er license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 6 of 9 4.3.2 Determination of the Release Force. 4.3.2.1 At
33、taching the adaptation (if necessary) to the release lever and ensuring that the closure is latched. 4.3.2.2 Measure the release force shall by pulling the release lever using the force gage at a semi-static/very slow rate (approximately 25 mm/s) and along the specified swing arc. See Figure 5. 4.3.
34、2.3 The maximum release force shall be read off the display of the tensile/compression gage and shall be recorded on the Data Sheet A1 in Appendix A. 4.3.2.4 If the handle is self returning, record on the data sheet whether or not the handle returned to its initial position. 4.2.3.5 This procedure s
35、hall be repeated five (5) times and the average value shall be determined. Note: 1 = Start position 2 = End position Figure 5: Adaptation for Release Lever Force Measurement 5 Data 5.1 Calculations. The average value shall be calculated from the five (5) individual measurements. 5.2 Interpretation o
36、f Results. The measurement results shall be documented. Evaluation of the measurement shall be performed on the evaluation sheet. If a deviation lies outside the range of tolerance, the relevant measurement shall be marked as NOK. 5.3 Test Documentation. The measurement results shall be compiled in
37、a test report with reference to this test procedure. 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 establish approp
38、riate 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 CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEER
39、ING STANDARDS GMW14276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 7 of 9 7 Notes 7.1 Glossary. In the text of this procedure, all the possible systems covered will be referred to as closure panel systems. 7.2 Acronyms, Abbreviations, and Symbols. FESM Front End Sheet
40、 Metal N/A Not Applicable NOK Not OK SSTS Sub System Technical Specification VTS Vehicle Technical Specification 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW14276 9 Release and Revisions This standard was originated in August 2005. It
41、was first approved by the Front and Rear Closures GSSLT in March 2006. It was first published in October 2006. Issue Publication Date Description (Organization) 1 OCT 2006 Initial publication. 2 JUL 2011 Update template/references. (Front and Rear Closures Global Subsystem Leadership Team) 3 JAN 201
42、2 Changed distribution type. (Front and Rear Closures Global Subsystem Leadership Team) 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 GMW1
43、4276 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 8 of 9 Appendix A Data Sheet A1: Test Information Project: Date: Vehicle No.: Checker: Development Status: Test Equipment ID: Test Location: Calibrated Until: Test Temperature: Closure Type: Closure Panel Release Handle
44、 Release Force Criteria Force in N Tactile/Audible Feedback Yes or No Handle Self Returned? Yes, No, or N/A OK or Not OK Release force; 1st Measurement Release force; 2nd Measurement Release force; 3rd Measurement Release force; 4th Measurement Release force; 5th Measurement Average Release Force: D
45、ata Sheet A2: Deviations Describe/list all deviations from the test procedure below. 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 GMW1427
46、6 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 9 of 9 Appendix B Data Sheet B1: List of Measuring Devices and Calibration Date of Measurement: Measuring Device Inventory No./Serial No. Calibrated Until Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
