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1、 WORLDWIDE ENGINEERING STANDARDS General Specification Interior GMW14593 Switch Assembly, Seat Belt Copyright 2006 General Motors Corporation All Rights Reserved October 2006 Originating Department: North American Engineering Standards Page 1 of 6 1 Introduction Note: Nothing in the specification su
2、persedes applicable laws and regulations unless specific exemption has been obtained. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Scope. This document specifies the requirements for seat belt switches (both retractor and b
3、uckle assemblies) used in low current applications, which control the functions described below. The switch must be located within the buckle or retractor, be fully protected, and not be removable without the use of tools. Switch operation or switch failure must not affect the performance or operati
4、on of the seat belt assembly. 1.2 Mission/Theme. 1.3 Classification. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. FMVSS 209 2.2 GM Standards/Specifications. GM9110P GMW3059 GM9604P GMW14831 GM9605P 3 Requireme
5、nts 3.1 System/Subsystem/Component/Part Definition. 3.1.1 Switch Operation for Buckle Switches. Normally Closed Contacts: When the seat belt latch plate is inserted into the seat belt buckle assembly, the switch contacts will open prior to latch plate engagement. The switch contacts must remain open
6、 after the latch plate engagement and not operate intermittently. The switch contacts will close when the seat belt latch plate is disconnected from the buckle assembly. The switch lead wires must not be visible between the buckle and the points where they enter the webbing. Operation of the buckle
7、release button must not activate the switch. Intermittent switch operation must not result from any possible latch plate movement in the engaged position. 3.1.2 Switch Operation for Retractor Switches. Normally Closed Contacts: When the webbing is in the fully retracted position, the switch contacts
8、 will be closed. When the webbing is pulled from the fully retracted position, the switch contacts shall open and remain open until the webbing is returned to the fully retracted position. Switch operation must have no noticeable effect on the extraction or retraction of the webbing into retractors.
9、 Intermittent switch operation must not result from any possible webbing movement once the latch plate is inserted into the buckle. 3.2 Calibration. Switch force to actuate, make and break points, and travel shall be within the calibration curves (force and continuity vs. displacement) shown in Figu
10、re 2 through Figure 5 (provided by suppliers) regardless of exposure to ambient temperatures, load currents, system voltages, rates of actuation, and usage cycles within its ratings (See section 3.1). 3.3 Operating Parameters. Switches shall be designed and tested by the supplier to show their abili
11、ty to operate within the ranges of voltage, current, temperature, and velocity as shown in Table 1, Table 2, and Table 3 of this specification. Switches shall meet all requirements of GM9604P “Standard Practice for Specifying Switches” found in 1.1 and 2 through 14 except as noted below, or otherwis
12、e noted in this specification. Paragraph 2.1 of GM9604P shall be: Temperature Rating. All devices are required to meet specification requirements from 40 to 85C. 3.4 General Information. Definitions and conditions of tests identified in Table 1, Table 2, and Table 3 shall be in accordance with GM960
13、4P and GM9110P. GMW14593 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 6 October 2006 Table 1: Switch Parameters GM9604P Section Retractor Switches Buckle Switches 2.1 Switch Temperature Rating -40 to 85C -40 to 85C 2.2 Current Rating (swi
14、tching) Steady State / Peak 0.3 to 20 mA 0.3 to 20 mA Duty Cycle Continuous Continuous 2.4 Rate of Actuation min 80 mm/s (webbing velocity) 10 mm/s (tongue velocity) max 1900 mm/s (webbing velocity) 60 mm/s (tongue velocity) 2.5 Wire Size (mm) 0.8 mm 0.8 mm GM9110P Section 5.1 Voltage Drop / Contact
15、 Resistance (max) 10 Ohms 10 Ohms 5.2 Open Circuit Resistance (min) 20 MOhms 20 MOhms 5.5 Temperature Rise 85C 85C 5.12 Contact Bounce % O.C. Volts 12% 12% max Duration Individual 10 ms 10 ms Total 100 ms 100 ms Number Bounces 3 max 3 max 9.3 Durability Equipment Rate 132 mm/s (webbing velocity) 35
16、mm/s (tongue velocity) Level Note 1 Note 1 Note 1: These numbers are given in GMW14831 sections 3.7.3.1.17.1 and 3.7.3.2.15. GM WORLDWIDE ENGINEERING STANDARDS GMW14593 Copyright 2006 General Motors Corporation All Rights Reserved October 2006 Page 3 of 6 Table 2: Test Leg Flow Chart Test Leg 1 Visu
17、al Inspection and Analysis Test Leg 4 Accelerated Environmental, Mechanical and Electrical Tests Performance Checks GM9110P, Section 5 Performance Checks GM9110P, Section 5 Terminal Retention GM9110P, Section 6.2 Dust Test GM9110P, Section 8.1 Connector Insertion GM9110P, Section 6.3 Humidity Test G
18、M9110P, Section 8.2 Cover Integrity GM9110P, Section 6.4 Salt Spray GM9110P, Section 8.3 Mechanical Overload GM9110P, Section 6.5 Thermal Shock GM9110P, Section 8.5 Visual Inspection GM9110P, Section 6.6 Fluid Compatibility GM9110P, Section 8.4 Test Leg 2 Accelerated Durability Tests Current Overloa
19、d GM9110P, Section 7.4 Performance Checks GM9110P, Section 5 Drop Test GM9110P, Section 7.5 Life Cycle 74 999 mechanical cycles only, last cycle electrical and mechanical GM9110P, Section 9 Shock Test GM9110P, Section 7.6 Visual Inspection GM9110P, Section 6.6 Vibration Test GM9110P, Section 7.7 Tes
20、t Leg 3 Accelerated Durability Tests Visual Inspection GM9110P, Section 6.6 Performance Checks GM9110P, Section 5 Test Leg 5 Accelerated Durability Tests Life Cycle 75 000 mechanical and electrical cycles GM9110P, Section 9 Performance Checks GM9110P, Section 5 Visual Inspection GM9110P, Section 6.6
21、 1000 Hour Load Soak GM9110P, Section 9.10 Visual Inspection GM9110P, Section 6.6 Note: All tests in Test Leg 4 shall be conducted with contacts in the OPEN position except Current Overload and Drop Test. GMW14593 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Right
22、s Reserved Page 4 of 6 October 2006 Table 3: Test Parameters Note 1 Visual Inspection & Analysis Ref. GM9110P, Section 6 Operation Code Dev. Tests Test to be Performed Test Values Terminal Retention (6.2) 110 N Connector Insertion (6.3) 75 N Cover Integrity (6.4) 110 N Mechanical Overload (6.5) Not
23、applicable Note 2 Visual Inspection (6.6) Contact Force 100 g (min) Electrical & Mechanical Tests Ref. GM9110P, Section 7 Current Overload ( ) Fusible Link (7.4.2) (x) Fuse (7.4.1) Drop Test (7.5) 1.0 M Shock Test 20 g 11 ms (7.6) No. of pulses 10 Vibration Test (7.7) 4 h each axis GM9110P Random Al
24、l pieces Environmental Tests Ref. GM9110P, Section 8 Dust Test (8.1) 0.6 kg/m3Duration (3 cycle/h) 5 h Manipulate Humidity Test (8.2) 95% 120 h Note 3 Salt Spray Test (8.3) (x) Fog ( ) Spray 24 h Note 4 Fluid Compatibility (8.4) (x) Pour ( ) Brush ( ) Engine (x) Passenger Thermal Shock (8.5) 10 cycl
25、es Durability Tests Ref. GM9110P, Section 9 Life Cycle (9.1 through 9.9) Bogey: 75 000 cycles 11 Samples Temperature Profile Note 5 (x) GM9110P ( ) Figure 3 300% Bogey 6 Samples 1000 h Load Soak (9.10) Temperature Profile ( ) Continuous (x) GM9110P ( ) Table 1 Reliability Demonstration Failure Plan:
26、 ( ) one (x) zero Note 1: All test shall be conducted with switch in assembly and mounted such that the assembly is oriented in the same position as installed in the vehicle. If switch includes a pigtail, readings will be taken at the connector end. Note 2: Design of buckle/retractor assembly shall
27、prevent mechanical overload to switch mechanism. Note 3: Humidity temperatures shall continuously vary between 24 and 45C and back once over each 24 h period maintaining at least 95% relative humidity. Note 4: Floor mounted retractor switches shall be tested for 50 h while all other switches shall b
28、e tested for 24 h (per FMVSS 209). Note 5: Test Leg 2 will run all cycles as mechanical except the last cycle, which will be mechanical and electrical (to simulate usage of belt being buckled prior to ignition). Test Leg 3 will run all cycles as mechanical and electrical (to simulate usage of belt b
29、eing buckled after ignition). -,-,- GM WORLDWIDE ENGINEERING STANDARDS GMW14593 Copyright 2006 General Motors Corporation All Rights Reserved October 2006 Page 5 of 6 Table 4: Periodic Performance Checks Reference GM9110P Reference Section Devl Tests Leg 1 Leg 2 Leg 3 Leg 4 Leg 5 Open Circuit Resist
30、ance GM9110P, 5.2 Isolation Resistance GM9110P, 5.3 Temperature Rise GM9110P, 5.5 Function Check GM9110P, 5.6 Displacement GM9110P, 5.7 Level to Actuate GM9110P, 5.8 Audible Sound GM9110P, 5.11 Contact Bounce GM9110P, 5.12 Contact Resistance Note 1GM9605P Samples No “symbol” indicates test is not re
31、quired. A: Each actuation or cycle. B: Before and after each test series. C: Before and after each test within a series Function check as 23C only. D: New, 25, 50, 75, 100, 150, 200, 300% of test. E: New, 10, 45, 80, 100, 145, 200, 300% of test (For compatibility of GM9110P Table 10). F: Before begi
32、nning test series and before visual inspection. G: Once per hour. Note 1: Circuits with steady state current equal to or less than 0.5 Ampere only. GMW14593 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 6 of 6 October 2006 Figure 1: Seat Belt I
33、nterface 4 Validation Annual revalidation will be determined by GM Supplier Quality. 5 Provisions for Shipping Not applicable. 6 Notes 6.1 Glossary. Not applicable. 6.2 Acronyms, Abbreviations, and Symbols. Not applicable. 7 Additional Paragraphs 7.1 All parts or systems supplied to this specificati
34、on must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 8 Coding System This specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMW14593 9 Release and Revisions 9.1 Release. This standard originated in October 2005, replacing GME2808M. It was first approved by the Global Safety Belt Team in March 2006. It was first published in October 2006. -,-,-