1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16829 Aero Shutter Assembly Dry Mud Bench Test Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 1 of 5 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict betwe
2、en the English and domestic language, the English language shall take precedence. 1.1 Purpose. The purpose of this procedure is to determine if an aero shutter assembly meets the dry mud bench test requirements of the Component Technical Specification (CTS). 1.2 Foreword. Not applicable. 1.3 Applica
3、bility. This test procedure is to be used for all aero shutter assemblies. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW3221 2.3 Additional References. Component Techni
4、cal Specifications (CTS) 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Software. Software and interfacing hardware shall be provided by the actuator supplier that includes the operating parameters for the actuator and can be used with a personal computer. These operating parameter
5、s include opening, closing, and commanding specific torque values to the actuator. 3.2.2 Pulse Width Modulation (PWM) or Local Interconnect Network (LIN) Generators. PWM or LIN generators are required to allow the software to send a signal to the actuator to cycle the aero shutter assembly and send
6、a signal back through the software that the aero shutter assembly was able to successfully cycle. The generator must also be capable of representing the actuator sending a signal to the vehicle level controller and triggering the “re-try” operation mode when an obstruction prevents the louvers from
7、cycling to the open or closed position. 3.2.3 Twelve Volt (12 V) Battery Source. A 12 V battery source is required to power the actuator. 3.2.4 Mud Application Apparatus. A Kobalt Air Hopper Gun or equivalent apparatus is required for application of mud. A Kobalt Air Hopper Gun (Model No. SGY-AIR84)
8、 can be ordered from the following website: . This apparatus must be equipped with an 8 mm diameter spray tip and capable of a maximum spray pressure of 40 psi. 3.2.5 Camera. A camera is required for pre and post test photographs. 3.3 Test Vehicle/Test Piece. 3.3.1 Test Piece. The parts used for des
9、ign validation (DV) testing are to be complete aero shutter assemblies off of prototype tools. The parts used for product validation (PV) are to be complete aero shutter assemblies off of production tools. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot
10、for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16829 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 2 of 5 3.3.2 Test Piece Quantity. Per CTS. 3.3.3 Conditioning. Condition to GMW3221, Code A. 3.4 Test
11、 Time. Calendar time: 1 days Test hours: 4 hours Coordination hours: 2 hours 3.5 Test Required Information. 3.5.1 Test Setup Photographs. Take photographs of the test setup prior to start of test. 3.5.2 Part Photographs. Take photographs of the aero shutter assemblies to be tested before, during, an
12、d after test. 3.6 Personnel/Skills. Prior experience in setting up and running similar tests and experience in the use of the referenced test equipment are critical to achieving the estimated times in 3.4. 4 Procedure 4.1 Preparation. 4.1.1 Test Piece Constraints. The aero shutter assembly is to be
13、securely constrained to a test fixture representing all vehicle attachments and the correct vehicle orientation. An example is provided in Figure 1. Figure 1: Example of Test Setup 4.2 Conditions. 4.2.1 Environmental Conditions. Test is to be run in a room at a temperature of 23 C 5 C. 4.2.2 Test Co
14、nditions. 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 Pre-Test Instructions. 4.3.1.1 Confirm Test Connections. Confirm the following connections hav
15、e been made correctly: personal computer to PWM or LIN generator, 12 V battery source to PWM or LIN generator, and PWM or LIN generator to actuator. 4.3.1.2 Cycle Definition. 4.3.1.2.1 Mud Application with Louvers Closed. A cycle is defined as follows: Starting with the shutters in the full closed p
16、osition, move the shutters to the fully opened position, and then back to the fully closed position. 4.3.1.2.2 Mud Application with Louvers Open. A cycle is defined as follows: Starting with the shutters in the full open position, move the shutters to the fully closed position, and then back to the
17、fully open position. 4.3.1.3 Confirm Test Operation. Cycle the aero shutter assembly through at least ten full open and close cycles to ensure proper operation of all system components. Note any irregular sounds or erratic operations Copyright General Motors Company Provided by IHS under license wit
18、h General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16829 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 3 of 5 indicating a potential problem with assembly or design, and verify
19、 observations with the requesting engineer. Confirm that there are no issues with the test setup and that signals are being sent and received through the software provided by the actuator supplier. 4.3.1.4 Mud Application Apparatus. The mud application apparatus per 3.2.4 must be equipped with an 8
20、mm diameter nozzle. 4.3.1.5 Mud. Obtain mud from Milford Proving Ground. Screen mud to remove large rocks. 4.3.2 Test Instructions. 4.3.2.1 Mud Application with Louvers Closed. At a distance of approximately 51 cm (20 in) from the aero shutter assembly apply an average of 1 to 2 mm of mud over 100%
21、of the available louver area. Measure thickness when wet using a scale. An example of measurement locations is provided in Figure 2. The green circles represent the measurement locations. Figure 2: Examples of Measurement Locations 4.3.2.2 Allow the mud 24 h to dry and harden. 4.3.2.3 Allow the aero
22、 shutter assembly to attempt a full cycle. 4.3.2.4 Repeat 4.3.2.3 for the minimum number of cycles required to break free of mud and recover normal function, a maximum of 20 cycles. Boost mode torque can be used in this scenario. 4.3.2.5 Document the specific torque used on each cycle and number of
23、cycles required to recover normal function in Data Sheet A1. 4.3.2.6 Document thickness measurements of six sections of dried broken mud in Data Sheet A1 in Appendix A. 4.3.2.7 Mud Application with Louvers Open. Repeat 4.3.2.1 through 4.3.2.6 using a new aero shutter assembly with the louvers in the
24、 open position. The boost strategy developed in 4.3.2.4 and documented per 4.3.2.5 for Mud Application with Louvers Closed is to be used for this test. 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. Refer to CTS. 5.3 Test Documentation. The pictures and results shall be pres
25、ented in a test report. Data Sheet A1 is to be used to document test observations. 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 thi
26、s 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 CompanyNot for ResaleNo reproduction or networking permitted without license from
27、 IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16829 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 4 of 5 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. CTS Component Technical Specifications DV Design Validation LIN Local Interconnect N
28、etwork PV Product Validation PWM Pulse Width Modulation 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW16829 9 Release and Revisions This standard was originated in June 2012. It was first approved by the Bumper, Fascia and Grilles GSSLT
29、in January 2013. It was first published in January 2013. Issue Publication Date Description (Organization) 1 JAN 2013 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license f
30、rom IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16829 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 5 of 5 Appendix A Data Sheet A1: Aero Shutter Assembly Dry Mud Bench Test Model Year: Program: Part Number: Sample No.: Start Date: Completion Date: Boost Strategy Deve
31、lopment Sample No. Torque Per Cycle (Nm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 Sample No. Louver Position Cycles to Recover Function Pre-Test Mud Thickness Post-Test Mud Thickness Observation 1 Closed 2 Closed 3 Closed 4 Open 5 Open 6 Open Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
