1、. SAE TITLE*VOL*2 * 8357340 004597Ll T m- 20.107 specified above shall be considered special and should be covered by TABLE 2-TENSILE REQUIREMENTS OF NONMETALLIC LOOMe loom, Nominal Size, in Min Tensile Requirement, Ib other specifications when required. Tests-A 6 in piece of loom totally immersed i
2、n water at 70F for 24 h and then blown out with a mild air current immediately after removing the water shall not have an increase in weight of more than 35%. The the inside diameter at 70F. The compound and finish must not crack wall must not collapse when the loom is bent to a radius of five times
3、 5/16 and 3/8 7/16 or larger 1 O0 150 open in this test. The material in the wall of the loom shall not crack or break when a 3 in length is flattened between two steel plates. When the inside diameter of loom is % in or smaller, the distance between plates is to be in. When the inside diameter of l
4、oom is over 3/8 in, the distance between plates is to be in. The finish shall not show excessive cracking when loom is subjected to this test. The polished mandrels used for checking the inside diameters shall show no sticking or discoloration up to 150F. Loom shall be capable of standing a tension
5、test for 5 min without breaking or opening at any point as required in Table 2. Additional Test for Oil Proof or Fire Resistant Loom-When a piece of loom is totally immersed in an equal mixture of cylinder oil, kerosene, and gasoline at 70F for 5 min and then subjected to a temperature e The test pi
6、ece shall be 6 in long between supports. not exceeding 250F for 1 h, the saturating compound must not drip from the loom nor the finish show any appreciable defects. Flame-resisting qualities shall be incorporated in the saturation or finish or both for the loom to pass the following test: the loom
7、shall not convey fire nor support combustion for more than 1 min after five 15-sec applica- tions of a standard test flame with intervals of 15 sec between applications. A standard test flame is the blue flame, about 5 in high, produced by a /n in bunsen burner fed with ordinary illuminating gas at
8、normal pressure. The loom shall be held vertically with either the lower or the upper end thoroughly sealed to prevent the passage of air, and the flame must be applied horizontally. ELECTRIC WINDSHIELD WIPER SWITCH-SAE J 1 1 2a SAE Recommended Practice I. DeJnition-An electric windshield wiper swit
9、ch is that part of an electric windshield wiper system by which the operator of a vehicle causes the wind- shield wipers to function. 2. Reference Standards 2.1 If the switch employs an internal circuit breaker(s), the circuit 2.2 If the switch employs the integral exterior circuit breaker. the circ
10、uit breaker shall comply with the requirements of SAE 5258 (June, 1971). 0 breaker shall comply with the requirements of SAE J553c (May, 1972). 3. Temperature Test 3.1 To insure basic function, the switch shall be manually cycled for 10 cycles at design electrical load at 75 t 10 F (24 5.5 C), 165,
11、+O, -5 F (74, +O, -2.8 C). and -25, +5, -0 F (-32, +2.8, -0 C) after a 1 h exposure at each of the temperatures. The switch shall be electrically and mechanically operable during each of these cycles. 3.2 This same switch shall be used for the endurance test described below. 4. Endurance Test Setup
12、4.1 The switch shall be set up to operate its design electrical load. 4.2 The test shall be set up to operate the switch for the prescribed number of completed cycles. One complete cycle shall consist of sequencing through each position (with dwell in each position) and return without dwell in inter
13、mediate positions to the initial position. The test equipment shall be so arranged as to provide the following mechan- ical time requirements: Travel Time-0.1-0.5 s (time from one position to the next). NOTE: If the switch employs a rheostat, the travel time through the rheostat segment in each dire
14、ction shall be 1.0-3.0 s. Dwell Time-0.50-1.0 s (time in each position). NOTE: After switching to OFF, if a motor is used, sufficient dwell time shall be provided to allow the motor to park. The dwell time in OFF can then be greater (if required) than the dwell time range indicated above. 4.3 During
15、 the test the switch shall be operated at 6.4 V d-c for a 6 V These voltages shall be measured at the input termination on the switch. The power supply shall not generate any adverse transients not present in (a) Output Current-Capable of supplying the continuous current of the (b) Regulation system
16、, 12.8 V d-c for a 12 V system, or 25.6 V d-c for a 24 V system. motor vehicles and shall comply with the following- specifications: design electrical load. Dynamic-The output voltage at the supply shall not deviate more than 1.0 V from zero to maximum load (including inrush current) and should reco
17、ver 63% of its maximum excursion within 100 ms. Static-The output voltage at the supply shall not deviate more than 2% with changes in static load from zero to maximum (not including inrush current), and means shall be provided to compensate for static input line voltage variations. (c) Ripple Volta
18、ge-Maximum 300 mV peak to peak. 5.1 The switch shall be capable of satisfactorily operating for 10,000 complete cycles at a temperature of 75 otherwise, measure- ment shall be made at switch terminals. 6. Combination Wina!shield Wiper and Washer Switch-The same combina- tion switch shall be used for
19、 the test of each function. If the washer and wiper functions are mechanically coordinated, the functions shall be tested simulta- neously. The wiper switch shall meet the requirements of this recommended practice. The washer switch shall meet the requirements of SAE 5234 (May, 1971). 5. Endurance R
20、equirements ELECTRIC WINDSHIELD WASHER SWITCH-SAE 5234 SAE Recommended Practice Rcpiiri iif Electrical Equipmrni Commiiiee approved Mar 1971. Editorial change Ociober 1977. I. DeJinition-An electric wkdshield washer switch is that part of an electric windshield washer system by which the operator of
21、 a vehicle causes the windshield washers to function. 2. Temperature Test 2.1 To insure basic function, the switch shall be manually cycled for 10 cycles at design electrical load at 75 & 10 F (24 2 5.5 C), 165 +O, -5 F (74, +O, -2.8 e), and -25, +5, -0 F (-32, +2.8, -0 C) after a 1 h exposure at ea
22、ch of these temperatures. The switch shall be electrically and mechanically operable during each of these cycles. 2.2 This same switch shall be used for the endurance test described below. 3. Endurance Test Setup 3.1 The switch shall be set up to operate its design electrical load. 3.2 The test shal
23、l be set up to operate the switch for the prescribed number of completed cycles. One complete cycle shall consist of sequencing through each position (with dwell in each position) and return without dwell in intermediate positions to the initial position. The test equipment shall be so arranged as to provide the following mechan- ical time requirements: Travel Time-0.1-0.5 s (time from one position to the next). Dwell Time-1.0-2.0 s (time in each position).
