1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1991 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National Sta
4、ndardJ2108REAF.DEC91Issued 1991-06Reaffirmed 1991-12DOOR COURTESY SWITCHForewordThis Reaffirmed Document has been changed only to reflect the new SAE Technical Standards BoardFormat.1. ScopeThis SAE Recommended Practice defines the test conditions, procedures, and performancerequirements for 6, 12,
5、and 24 V Door Courtesy Switches which are intended for use in motor vehicles.2. ReferencesThere are no referenced publications specified herein.3. DefinitionsThe courtesy lamp switch is a door or door latch actuated device which controls the electricaloperation of the courtesy lamp, ignition key ala
6、rm, and other related components.4. Types4.1 Grounded and Non-GroundedGrounded switches provide an electrical path to vehicle ground throughtheir mounting attachment. Non-grounded switches have their electrical conductors insulated from vehicleground.4.2 Single TerminalCharacterized by one wiring co
7、nnection to the vehicle.4.3 Multi-TerminalAny other terminal/connector configuration, other than single terminal.4.4 SpecialSwitch types, which by their design, construction, and function, require separate definition.5. CycleOne cycle shall consist of allowing the actuation portion of the switch to
8、move or be moved throughoutits travel and to return to its initial position.6. Test Requirements6.1 Test Equipment and Instrumentation6.1.1 POWER SUPPLYThe power supply shall comply with the following specifications:6.1.1.1 Output CurrentCapable of supplying the continuous and inrush currents of the
9、 design load (reference6.2.1.1).SAE J2108 Reaffirmed DEC91-2-6.1.1.2 RegulationDynamic: The output voltage at the supply shall not deviate more than 1.0 V from zero tomaximum load (including inrush current) and should recover 63% of its maximum excursion within 100 ms.Static: The output voltage at t
10、he supply shall not deviate more than 2% with changes in static load fromzero to maximum (not including inrush current), and means shall be provided to compensate for static inputline variations.6.1.1.3 Ripple VoltageMaximum 300 mV peak-to-peak.6.1.2 VOLTMETER0 to 30 maximum full scale deflection, a
11、ccuracy %. (Note: a digital meter having at least a3 digit readout with an accuracy of 1% plus 1 digit is recommended for millivolt readings.)6.1.3 AMMETERCapable of carrying full system load current, accuracy 3%.6.2 Test ProceduresEnvironmental conditions have been selected for this document to hel
12、p assure satisfactoryoperation under general customer use conditions. It is essential to duplicate the specific environmentalconditions under which the device is expected to function.6.2.1 ELECTRICAL LOADS6.2.1.1 The design load applied to the switch is the electrical load defined by the number and
13、type of bulbs (orother electrical load devices) to be operated by each circuit of the switch. For example, the design load forthe courtesy lamp circuit may be four 1156 bulbs.6.2.1.2 The switch shall be operated at 6.4 V DC 0.2 V DC for a 6 V system, 12.8 V DC 0.2 V DC for a 12 Vsystem, or 25.6 V DC
14、 0.2 V DC for a 24 V system. These voltages shall be the open circuit voltagemeasured at the input terminations of the switch.6.2.2 TEMPERATURE TEST PROCEDURE6.2.2.1 The switch shall be exposed for 1 h without electrical load to each of the following temperatures: 25 C 5C, 74 C +0, 3, 32 C +3, 0. Th
15、e switch shall be cycled at each temperature for ten cycles at designload.6.2.2.2 The same switch shall be used for the endurance test described in 6.2.3.6.2.3 ENDURANCE TEST PROCEDURE6.2.3.1 The switch shall be electrically connected to operate its design load (both primary and secondary circuitfun
16、ction design electrical loads) at a temperature of 25 C 5 C.6.2.3.2 The switch shall be operated for a minimum of 50 000 cycles. The speed and the incident angle ofactuation shall be representative of the point of application (“A“ pillar, “B“ pillar) in the vehicle. The testequipment shall be design
17、ed to provide this timing: Travel Time: 0.1 to 1.0 s (time to travel from oneextreme position to the other). Dwell time: 2.0 to 5.0 s (time spent stationary at an extreme position).Make and Break Rate Range:“A“ Pillar application: 30 to 300 mm/s.“B“ Pillar application: 0.3 to 3.0 m/s.6.2.3.3 At the
18、conclusion of the endurance testing, the switch shall be operated for 1 h in each of its positions withthe design load connected.SAE J2108 Reaffirmed DEC91-3-6.2.4 VOLTAGE DROP TEST PROCEDURE6.2.4.1 Voltage drop from the input terminal(s) to the corresponding output terminal(s) shall be measured atd
19、esign load before and after the completion of the endurance test. Three consecutive readings shall betaken and the average recorded. If wiring is an integral part of the switch, the voltage drop measurementshall be made by including 75 mm 6 mm of wire on each side of the switch. Otherwise, the measu
20、rementshall be made at the switch terminals.7. Performance Requirements7.1 During and after each of the cycles described in 6.2.2 and 6.2.3, the switch shall operate without hesitationmechanically, e.g., not more than 1.0 s, and shall be within its electrical design specifications.7.2 The voltage dr
21、op shall not exceed 0.3 V when measured as in 6.2.4, either before or after the tests describedin 6.2.3.PREPARED BY THE SAE SWITCH TASK FORCE OF THE SAE AUXILIARY DEVICES STANDARDS COMMITTEESAE J2108 Reaffirmed DEC91RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.A
22、pplicationThis SAE Recommended Practice defines the test conditions, procedures, and performancerequirements for 6, 12, and 24 V Door Courtesy Switches which are intended for use in motor vehicles.Reference SectionThere are no referenced publications specified herein.Developed by the SAE Switch Task ForceSponsored by the SAE Auxiliary Devices Standards Committee
