1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards STEERING WHEEL LOCK EDS-T-2624 ISSUED DATE: 1995 .03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 EDS-T-2624STEERING WHEEL LOCK PAGE: 1/6 ISSUED DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & T
2、echnology 1. PURPOSE This test specification defines the test conditions, sequences and requirements to steering wheel locks of passenger car and includes the legal requirements requisite for these parts. The steering wheel locks are examined by static tests (forced proof) on their safety from burgl
3、ars and mechanical strength as well as their assembled state in the endurance test on their operability in the vehicle. 2. SCOPE This standard apply to steering wheel locks part of passenger car 3. NOTE Samples of components or materials released to this specification shall be tested for conformity
4、with the requirements of this specification and approved by GMDAT Technical Center prior to commencement of delivery of bulk supplies. In the event of any Intentional deviations from the requirements of this specification, it is the sole responsibility of the supplier to inform the purchaser of all
5、such deviations. Furthermore the supplier shall submit unsolicited samples for re-approval by GMDAT Technical Center prior to commencement of delivery of deviant bulk supplies. 4. TEST SAMPLES AND TEST QUANTITY 4.1. The test of steering wheel lock is performed on the mechanical locking parts at the
6、static test, completely at the steering wheel lock ASM, including electric switching part at the endurance test. 4.2. For the static test, per a supplier, 3 steering wheel locks are requisite at initial samplings as well as for the current quality control, 10 for the endurance test and for material
7、examination is well as 5 for the current quality control. 5. PRETREATMENT OF SAMPLE The tests are performed at +235K in the delivery state without pre-treating the sample, if nothing else is specified. 6. TESTING INSTRUMENTS AND AUXILIARY MEANS 6.1. Static test 6.1.1. Fixtures for the installation o
8、f steering wheel lock The steering wheel locks are mounted on a production, type-fixed steering ASM. 6.1.2. Torsion-testing machine On the faceplate of a torsion-testing machine, the supporting device is mounted, into which the mechanical locking part is absorbed. After interlocking the steering gea
9、r by the steering wheel lock, a torque moment with a EDS-T-2624STEERING WHEEL LOCK PAGE: 2/6 ISSUED DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & Technology velocity of 30% min 10% is applied over the steering wheel. Measuring error of the machine 1%. 6.1.3. Torque-moment
10、 indicator The reading accuracy should come to 5Nm. The testing instruments to clause 6.2 to 6.4 described in the following must enable a fast gripping of the steering wheel lock ASM. But the influences, which can possibly tamper the result of the test (for example, too fast gripping of the housing)
11、, are to be excluded them. 6.2. Endurance test 6.2.1. The locking bolt must be freely movable and may not engage in any other part. Furthermore the testing instrument must make it possible to perform continuously successive switching and circuit-breaking processes.(A switching and circuit-breaking p
12、rocess c=1 cycle) means the revolution of key and lock cylinder in the steering wheel lock housing over the whole operating range from “Block“ to starting and back to “Block“). 6.2.2. The fast-gripped key is inserted into the lock cylinder without coaxial tilting in position “Block“ and moves the lo
13、ck cylinder in the steering wheel lock housing. All construction-conditioned axial movements of the lock cylinder must be effected free-movably by the key. The switching time from a position to the other comes to 0.1 to 0.5s, the duration of dwell in the individual positions except the position “Blo
14、ck“ comes to 1.0 to 2.0s. 6.2.3. With equal velocity of motion, the key is slackened back to the starting position without dwelling time in the individual positions and completely drawn out of the lock cylinder. Duration of dwell in position “Block“ max. 5s. During this time the key is drawn off and
15、 inserted again. 6.3. Testing instrument for the measurement of extracting forces The gripped key is inserted into the lock cylinder without coaxial tilting and extracted again. 6.4. Testing instrument for the measurement of the resting and restoring moments The fast-gripped key moves the lock cylin
16、der in the steering wheel lock housing. All construction-conditioned axial movements of the lock cylinder must be executed free-movably by the key. The switching time from a position to the other comes to 0.1 to 0.5s. 6.5. A tension-pressure-testing machine(suitable is a tension-testing machine to D
17、IN 51 221, class 1) must be so equipped that the testing described in the individual clause can be performed with a stressing velocity of (10010)mm/min. 6.6. Refrigerator, adjustable to -403K. 6.7. Warming cupboard, to adhere to the specified requirements including the tolerances (suitable are warmi
18、ng cupboards to DIN 50 011, Pt. 1, section 2.2). 6.8. Adjustable current source, loadable to the current specified for the electric switching part of the steering wheel lock. EDS-T-2624STEERING WHEEL LOCK PAGE: 3/6 ISSUED DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & Tech
19、nology 6.9. Ammeter for the range (3A, 15A, 30A and 75A): Accuracy 0.5% 6.10. Voltmeter for the range (150mV to 15V): Accuracy 0.5% 6.11. Current supply For the current supply at the function test, higher requirements than at the endurance test are valid. 6.12. Current supply at the function test Th
20、e current source must be able to deliver the inrush and permanent current necessary for the operation at direct voltage between 9V and 15V. At switching-in of the maximal load, the voltage may not sink from the adjusted value by more than 1V in the closing moment and must be increased again by 63% o
21、f its max. drop amount within 100k . The deviation of voltage after switching in the max load may not come to more than 2% or previously load-freely adjusted voltage value. A superordinated A.C voltage may not exceed 75mVss. 6.12.1. Current supply at the endurance test The current supply must be abl
22、e to deliver the inrush of continuous current necessary for the operation of loading aggregate at D.C. voltages between 12V and 15V. At switching in the max. load, the voltage may not drop by more than 1V from the adjusted value in the switching-in moment and must be increased again by 63% of its ma
23、x. waste amount within 5ms. The voltage deviation after switching in the max. load may not come to more than 2% of the previously load-freely adjusted voltage value. A superordinated A.C. voltage may not exceed 500mVss. 6.13. Test arrangement for the function test of the individual switches and for
24、the determining of operating angle. Accuracy: 1 6.14. Electric receivers bound by the type of vehicle or equivalent receivers or spare circuit. 6.15. Fundamentally, other suitable test arrangements are permissible, if the test results at the manufacturers satisfy the requirements of these technical
25、terms of delivery. 7. REQUIREMENTS 7.1. General requirements 7.1.1. Lock cylinder ASM (1) The dimensions of lock cylinder must correspond to the sizes specified on the drawing and its tolerances. The accuracy to gauge is tested with a gauge. (2) The lock cylinder must break at the test of a forceful
26、 opening at the collar at a weak point to be determined by the manufacturer. (3) Minimum 10 double-tongued tumblers must be safe from scanning. EDS-T-2624STEERING WHEEL LOCK PAGE: 4/6 ISSUED DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & Technology (4)The lock must be secu
27、red against Hobbs unlocking method. (5) Rounding at tongues and locking notches max. 0.1mm. (6) Diametrical clearance max. 0.15mm. (7) Difference between the highest and the lowest tumbler min. 1.5mm. (8) Number of unsymmetrical locks profiles per supplier 2. (9) The number of closings may not fall
28、below 250 per profile. (10) The used locks must embrace min. 1000 various locking possibilities, that is, a key corresponding to a certain locking possibility is not able to open more than one lock of 1000 on an average. For the same type of vehicle, the frequency of application of a certain locking
29、 possibility must perhaps stand in the relation of 1:1000. (11) Furthermore, no more than 2 equal tumblers may not be side by side and no more than 50% equal tumblers available on a side. (12) The tapping power of plastic cap, so fat as available, in axial direction may not fall below 300N. The plas
30、tic cap is, if available, drawn over the edge of the steering wheel lock cylinder. Defects, such as cogging, jamming etc. which tamper with the measuring result, are to be disqualified. (13) The steering wheel lock must withstand a torque moment of 4Nm acting at the key at locked stop bolt(stop bolt
31、, halted). For this, the steering wheel lock ASM. is chucked corresponding to the specifications in clause 6.4 and loaded to the given torque moment. Deviant from clause 6.4, the key is moved with max. 72% min. (14) On proper point, makers mark, key number and part number must be fixed. 7.1.2. Switc
32、h ASM. (1) For the leads the technical terms of delivery, test specifications EDS-T-5241 are valid. (2) Extracting power(leads) and slip-on power(plug). For the determination of extracting power and slip-on power, the electric switch part is productionally and the leads and plug are firmly chucked i
33、nto the tension and compression testing machine acc. to clause 6.5. The power introduction must result axially, if possible. With a loading speed of 100mm/min10%, the leads are drawn out of or from the switch part and the plugs are inserted in to the switch part. 1) After then, the leads connected w
34、ith the switch part by soldering may not pluck out at the following powers. (Extracting power): Individual leads: 60N, All leads: 100N 2) Plug connections must all be drawn off with a power of 80150N(extracting power) and be slipped on with a power of 150N max(slip-on power). 3) The electric switch
35、part may not experience any function- injurious changes at the test to clause 7.1.2, (2), 1) and clause 2). The operating angles, measured acc. to clause 6.12, must correspond to the values given on drawings. 7.1.3. Steering wheel lock (1) The dimensions of steering wheel lock must correspond to the
36、 sizes given on drawings and its tolerances. The accuracy to gauge is tested with a gauge. (2) The stop bolt must be secured with an interlocking device. (3) At locked stop bolt (stop bolt, prevented at resting) the steering wheel lock must be operable. EDS-T-2624STEERING WHEEL LOCK PAGE: 5/6 ISSUED
37、 DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & Technology (4) On proper point of steering wheel lock housing, GMDAT trade mark, acc. to EDS-A-0040, the part number and the makers mark must be fixed. 7.2. Static test, theft test (forced proof) The mechanical locking part i
38、s mounted on the type-bound steering ASM according to clause 6.1.1 and stressed by applying a torque moment at locked steering wheel lock system(ignition key drawn off, stop bolt engaged) corresponding to clause 6.1.2 on shearing action. The forced stress results alternately to the left and the righ
39、t to the torque moment of 200Nm with an increase of loading of 50Nm and from torque moment 200Nm with an increase of loading of 25Nm per a back - and fro-movement. The steering wheel lock ASM must withstand a torque moment of 250Nm (legal requirements 200Nm) round the steering column axles, in both
40、directions under static conditions without any damage of the steering system endangering the traffic safety. The judgment results after all releasing process after unlocking. After then, the steering may not lock, the steering wheel lock must be full-operable. 7.3. Function tests With these tests th
41、e usability of steering wheel lock ASM should be researched completely with electric switch part with regard to the assembly in the vehicle, under laboratory conditions. The tests are performed in the delivery state as well as after the endurance test (clause 7.3.4). This is valid also for the opera
42、bility at variable temperatures. All tests listed in the following are performed without additional lubrication of the gliding parts. 7.3.1. For the determination of key-inserting and-extracting power, the steering wheel ASM is chucked acc. to clause 6.3. At this time the key-inserting force may not
43、 exceed 12N and the key-extracting force 12N. 7.3.2. For the determination of the resting and restoring moments, the steering wheel lock ASM is chucked acc. to clause 6.4 and the key and lock cylinder rotated in the steering wheel lock housing. (1) The resting moment from the individual positions at
44、 secured stop bolt must come to (0.3 + 0.1) Nm. (2) The resting moment from block at unlocked stop bolt, max. 0.8 Nm. (3) The resting moment from the individual positions at secured stop bolt must be at least double so high as the rubbing moment. (4) The operating moment in position starting may com
45、e to 0.75 Nm max. (5) Restoring moment must come to 0.2 Nm min. The restoring moment is the moment which is measured in the instant when the key and lock cylinder begin to move back from the position “starting“. 7.3.3. For the determination of voltage drop, the individual outputs of the electric swi
46、tch part are loaded with the current given on the drawing. The drop in voltage at the contact clamps may not exceed 100mV after 3-times operations in the delivery state, 150mV after the endurance test. 7.3.4. The steering wheel lock ASM is stored at following temperature: (1) 24h at -403K, subsequen
47、tly (2) 24h at +802.5K At these temperatures, the operability of the steering wheel lock ASM must be guaranteed, that is, the steering wheel lock must be able to switch perfectly and the mode of operation of the electric switch part may not be impaired. EDS-T-2624STEERING WHEEL LOCK PAGE: 6/6 ISSUED
48、 DATE: 1995. 03. 14 REVISED DATE: 2005. 12. 14 VERSION: 3 GM DAEWOO Auto & Technology (3) 1h at +902.5K After this test results only a visual checking. 7.3.5. For the performance of endurance test, the steering wheel lock ASM is mounted corresponding to clause 6.2.1 and workably connected with the r
49、eceiver used in the vehicle. Corresponding to the specifications in clause 6.2, the steering wheel lock ASM is stressed as follows. (1) 23000 switching cycles at +235K. (2) 1000 switching cycles after 24h adjustment to -203K. (3) 1000 switching cycles after 24h adjustment to +602.5K. 7.3.6. The stop bolt may rest in “Block“ only at extracting of the key after performance of all tests. 8. ADDITIONAL REQUIREMENTS 8.1. Approved suppliers, see release or release of component drawings. 8.2. Further specifications, see component drawing. 8.3. Al
