SAE J 942-1999 Passenger Car Windshield Washer Systems《客车挡风玻璃清洗系统》.pdf

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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 1999 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、ndardJ942REV.JUN1999Issued 1965-11Revised 1999-06Superseding J942 JUL72(R) Passenger Car Windshield Washer Systems1. ScopeThis SAE Recommended Practice establishes for passenger cars, light trucks, and multipurposevehicles with GVW of 4500 kg (10 000 lb) or less:a. Minimum performance standards for

5、the windshield washer system.b. Test procedures that can be conducted on uniform test equipment by commercially availablelaboratory facilities.c. Uniform terminology of windshield washer system characteristics and phenomena consistent withthose found in guides for the use of engineering layout studi

6、es to evaluate system performance.d. Guides for the design and location of components of the systems for function, servicing of the system,etc.The minimum performance requirements and test procedures, outlined in this document, are based oncurrently available engineering data. It is intended that al

7、l portions of the document will be periodicallyreviewed and revised as additional data on windshield washer system performance are developed.2. References2.1 Applicable PublicationsThe following publications forms a part of the specification to the extent specifiedherein. Unless otherwise indicated,

8、 the latest revision of SAE publications shall apply.2.1.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J198Windshield Wiper SystemsTrucks, Buses, and Multipurpose VehiclesSAE J726Air Cleaner Test CodeSAE J903Passenger Car Windshield Wiper Systems2.1.2 AST

9、M PUBLICATIONAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 1149Test for Accelerated Ozone Cracking of Vulcanized RubberCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J942 Revised JUN1999-2-3. Definitions3.1 Windshield

10、 Washer SystemAn apparatus/container for storing, filtering, if applicable, and applying fluid tothe exterior of the windshield glazing surface, excluding the necessary controls to actuate and arrest operations.3.2 ControlA means for actuating and arresting the operation of the windshield washer sys

11、tem. The actuationand arrest may be coordinated or semi-coordinated with components of the windshield wiper system or may befully independent. The controls will be excluded in the validation of the document.3.3 Actuation and ArrestA use of the controls which causes the windshield washer system to be

12、gin and ceaseoperation.3.4 FunctionThe windshield washer system shall store, filter, if applicable, and apply fluid to the target area onthe windshield glazing surface.3.5 PumpA device for transferring the washer solution from the reservoir through the remainder of the washersystem to the windshield

13、 glazing surface.3.6 ReservoirA container, capable of storing the washer solution.3.7 Washer SolutionThe fluid used in the washer system consisting of water or water with appropriatecommercial additives. Water is not to exceed 205 ppm hardness.3.8 Commercial AdditivesMaterials which are compatible w

14、ith the system and which may be added to depressthe fluid freezing point, assist in cleansing, and/or increase the wetting capacity of the washer solution.3.9 Low Temperature Washer SolutionA 50% solution of methyl alcohol, or alternatively isopropyl alcohol,and water not greater than 205 ppm hardne

15、ss for use with low temperature tests.3.10 NozzleA device for directing washer solution to the windshield glazing surface.3.11 Target AreaThe design area on the windshield glazing surface to which the washer solution is directed bythe nozzle, with the vehicle at rest.3.12 Daylight Opening (DLO)The t

16、erm “daylight opening” (DLO) refers to the maximum unobstructed openingthrough any glass aperture, with reveal or garnish moldings adjoining the glazing surface installed normal toglass surface.3.13 Wash AreaThat portion of the windshield glazing surface within the DLO which is wiped when the wiperb

17、lade travels through a wiper cycle.3.14 Wiper CycleThe movement of the wiper arm and blade from one extreme to the other and return.3.15 Durability Test CycleThe system actuation(s) is defined as 4 s 1 s on and the remainder of a 30-s cycleoff. This repeats two times per minute as required in Table

18、1.TABLE 1TEST SEQUENCETestDurability TestCyclesTotalDurability TestCyclesNo./minAmbientTemperaturesC 31 2000 2 24.02 2000 2 66.03 2000 2 18.04 2000 2 24.0COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J942 Revised JUN1999-3-4. Requirements4.1 Washer Syste

19、m CapabilityWhen tested in accordance with test procedures described in 5.1, thewindshield washer system, in conjunction with the wiper system, shall be capable of clearing, within 5 wipercycles, 80% of the total wash area and 90% of the wash area included in area C as defined in SAE J903 forpasseng

20、er cars and SAE J198 for trucks, buses, and multipurpose vehicles.4.2 System StrengthThe windshield washer system shall be capable of withstanding the loads induced wheneither all nozzles are blocked or the system is frozen and tested in accordance with the test proceduresestablished in 5.2. At the

21、completion of the test, the system shall function.4.3 Washer System PrimingThis test shall be conducted on a non-primed or fully drained hose/nozzle system.Washer fluid shall contact the target area and wipers shall begin cycling within 4 s from the time the washercontrol is activated.4.4 Temperatur

22、e Performance and Exposure4.4.1 LOW TEMPERATURE EXPOSUREThe windshield washer system must be functional and deliver a minimum of75% of the original flow rate and deliver fluid to the target area of the glazing surface after being subjected toa total of 6 freeze-thaw cycles with a freeze temperature

23、of 30 C as described in 5.5.2.1. There must beno leakage or disconnection of the tubing.4.4.2 HIGH TEMPERATURE EXPOSUREThe windshield washer system must be functional and deliver a minimum of75% of the original flow rate and deliver fluid to the target area of the glazing surface after exposure to a

24、temperature of 91 C as described in 5.5.2.2. There must be no leakage or disconnection of the tubing.4.4.3 OPERATING RANGEThe windshield washer system must be functional and deliver a minimum of 75% of theoriginal flow rate and deliver fluid to the target area of the glazing surface within a tempera

25、ture range of 18to 80 C as described in 5.5.2.3. There must be no leakage or disconnection of the tubing.4.5 DurabilityThe washer system must be functional and deliver a minimum of 75% of the original flow rate anddeliver fluid to the target area of the glazing surface after operating 8000 durabilit

26、y test cycles as specified in5.6.2.3. There must be no leakage or disconnection of the tubing.4.6 Windshield Washer Tubing4.6.1 OZONE RESISTANCEAfter testing in accordance with the test procedures established in 5.6.1, the tubingshall show no visual evidence of splitting or cracking.4.6.2 TEMPERATUR

27、E AGINGAfter testing in accordance with the test procedures established in 5.6.2, the tubingshall show no visual evidence of splitting or cracking. The reduction in elongation shall not be greater than50% in the unexpanded portion of the specimen. There shall be no visual evidence of wax or othercon

28、taminants exuding from the tubing.4.6.3 STRESS RELAXATIONAfter testing in accordance with the test procedure established in 5.6.3, the tubing IDshall be no larger than 1.65 times the tubing original nominal ID.4.7 Chemical ResistanceThe windshield washer system shall not be adversely affected when o

29、perated with a50% solution of methyl alcohol or isopropyl alcohol.4.8 AccessibilityThe production intent in-vehicle control and the reservoir filler opening shall be positioned sothat they are readily accessible.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Services

30、SAE J942 Revised JUN1999-4-5. Test Procedure5.1 System Capability5.1.1 TEST EQUIPMENT5.1.1.1 Test FixtureA test fixture shall consist of a structure used to mount the components of the windshieldwiper/washer system in a manner which represents a vehicle installation.5.1.1.2 Test Vehicle5.1.1.3 Test

31、MixtureBy volume, 92.5% tap water (water not to exceed 205 ppm hardness), 5.0% saturated salt(sodium chloride) water, and 2.5% coarse grade test dust (as described in SAE J726, or equivalent).5.1.1.4 Cleanser5.1.2 TEST PROCEDUREa. Using the nominal power input specified by the manufacturer, adjust w

32、asher nozzle(s), if applicable,under static conditions to the target area of the windshield glazing surface.b. Clean the windshield glazing surface with a cleanser, rinse, and allow to dry.c. Apply, by pouring (or any other method which provides an equivalent uniform coating), a freshlyshaken quanti

33、ty of the test mixture uniformly to the entire windshield glazing surface without coatingthe windshield wiper blades. If the test mixture does not uniformly adhere to the entire windshieldglazing surface, the glazing surface is not sufficiently clean.5.1.2.1 Static TestAfter the mixture has complete

34、ly dried on the windshield glazing surface, the washer systemusing water as the washer solution or the low temperature washer solution must meet the requirements of4.1.5.1.2.2 Dynamic Test ProcedureRepeat 5.1.2.1 while directing a 112 km/h wind against the windshield and frontof the test vehicle or

35、equivalent in a longitudinal direction. The equivalent test vehicle must include allexterior surfaces which affect airflow over the windshield surface.5.2 System Strength5.2.1 TEST EQUIPMENT5.2.1.1 Test FixturesSee 5.1.1.1 or, as an alternate, a structure may be used to mount the washer system parts

36、in proper vehicle attitude, with hoses coiled to reduce the overall size of the fixture for convenient utilizationof small laboratory environmental chambers.5.2.1.2 Temperature Measuring DeviceThermometer or equivalent.5.2.2 TEST PROCEDUREThis test shall be conducted after the system capability test

37、 described in 5.1 iscompleted. The test shall be conducted in the following manner using the voltage or force (applicable forhand and foot operated pumps) input level specified by the vehicle manufacturer.5.2.2.1 Fill and fully prime the washer system with water. At an ambient temperature of 20 C 7

38、C, all nozzlesshall be plugged and the system shall be actuated six more times within a period of 1 min.5.2.2.2 Fill and fully prime the washer system with water and freeze for a minimum of 4 h at a temperature of 18C 3 C. Following this period and in the same temperature environment, actuate the wa

39、sher system sixtimes within a period of 1 min.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J942 Revised JUN1999-5-5.2.2.3 Unplug the nozzles and gradually increase the ambient temperature to 20 C 7 C until the ice iscompletely thawed. Test the function

40、of the system.5.3 System Priming5.3.1 TEST EQUIPMENT5.3.1.1 Test FixturesA test buck with the wiper and washer system installed in proper vehicle orientation (inparticular, hose routing levels.)5.3.1.2 Test ProcedureAssemble the washer system without fluid. Fill reservoir to top of pump inlet and th

41、enadd additional 500 mL. With system set at nominal voltage as specified by vehicle manufacturer, measurethe elapsed time between the actuation of washer control and washer fluid contacting the target area. Inaddition, measure the elapsed time between fluid contacting the target area and wiper cycli

42、ng, regardlesswhich function occurs first.5.4 Temperature Performance and Exposure5.4.1 TEST EQUIPMENT5.4.1.1 Test FixtureSee 5.2.1.1.5.4.1.2 Environmental chamber(s) capable of maintaining the test temperatures.5.4.2 TEST PROCEDURESThese tests shall be conducted after the system strength test descr

43、ibed in 5.2 iscompleted. Fill and prime the washer system with washer solution and perform the following tests:5.4.2.1 Low Temperature ExposureUsing water as the washer solution, reduce the ambient temperature to30C 3 C and maintain for sufficient time to insure that the total mass of the water in t

44、he reservoir isfrozen, including the core which freezes last. Following this period, gradually increase the ambienttemperature to 20 C 7 C until the ice is completely thawed. Repeat this freeze-thaw cycle until a totalof six cycles have occurred. After the last cycle, test the function of the system

45、.5.4.2.2 High Temperature ExposureUsing water as the washer solution, increase the ambient temperature to91C 3 C and maintain for a minimum of 8 h. Following this period, reduce the ambient temperature to20 C 7 C until the system stabilizes. Test the function of the system.5.4.2.3 Operating RangeUsi

46、ng a low temperature washer solution, reduce the ambient temperature of 18 C 3 C) until the washer system has stabilized at this temperature. Following this period and in the sameenvironment, test the function of the washer system, using the nominal power input specified by themanufacturer. Repeat w

47、ith an ambient temperature of 80 C 3 C using water as the washer solutionand again test the function of the washer system.5.5 Durability5.5.1 TEST EQUIPMENT5.5.1.1 Test FixtureSee 5.2.1.1.5.5.1.2 Environmental chamber(s) capable of maintaining test temperatures.5.5.1.3 CounterA device for determinin

48、g the number of washer cycles.5.5.1.4 Temperature Measuring DeviceThermocouple or equivalent.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J942 Revised JUN1999-6-5.5.1.5 Low temperature washer solution.5.5.1.6 Pressure measuring gage or transducer.5.5.1.

49、7 Stopwatch.5.5.1.8 Graduated cylinder.5.5.2 TEST PROCEDURE5.5.2.1 This test shall be conducted after the Temperature Performance Test described in 5.4 is completed.5.5.2.2 Using the nominal power input specified by the manufacturer, measure washer system fluid flow rate, orvolume per actuation, and fluid delivery pressure.5.5.2.3 Actuate system for 8000 durability test cycles in the sequence indicated in Table 1, using the lowtemperature washer solution when required.5.5.2.4 Repeat 5.5.2.2.5