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J1
Windshield Wiper Systems—Trucks, Bus, and Multipurpo Vehicles
1.
Scope—This SAE Recommended Practice establishes for trucks, bus, and multipurpo pasnger vehicles with GVW of 4500 kg (10 000 lb) or greater:
高中生赚钱a.Minimum performance requirements for windshield wiping systems.
b.Uniform test procedures that include tho tests that can be conducted on uniform test equipment by
commercially available laboratory facilities.
c.Uniform terminology of windshield wiper system characteristics and phenomena consistent with tho
found in guides for the u of engineering layout studies to evaluate system performance.
林州风景区d.Guides for the design and location of components of the systems for function, rvicing of the system,
etc.The test procedures and minimum performance requirements, outlined in this document, are bad on currently available engineering data.
It is the intent that all portions of the document will be periodically reviewed and revid as additional data regarding windshield wiping system performance are developed.
2.References
2.1
Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwi indicated, the latest issue of SAE publications shall apply.
2.1.1
SAE P UBLICATIONS —Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J680—Location and Operation of Instruments and Controls in Motor Truck Cabs SAE J687—Nomenclature—Truck, Bus, Trailer SAE J941—Motor Vehicle Driver’s Eye Range SAE J2349—Electric Windshield Wiper Switch
2.1.2ASTM P UBLICATIONS —Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959ASTM D 518—T est Method for Rubber Deterioration—Surface Cracking
ASTM D 1171—Test Method for Rubber Deterioration—Surface Ozone Cracking Outdoors or Chamber
(Triangular Specimens)
2.1.3ISO P UBLICATION—Available from ANSI, 11 West 42nd Street, New Y ork, NY 10036-8002.
ISO 9259—Pasnger cars—Windscreen wiper systems—Wiper arm to blade connections
3.Definitions
3.1Wiper System—The wiper system consists of all the apparatus for clearing the exterior of the windshield
glazing surface, together with the necessary devices and controls to start and stop the operations.
咖啡师工资3.2Wiper Blade—A device for clearing the effective wipe pattern, capable of receiving a load from an arm,
comprising a suitable superstructure supporting and controlling a wiper blade element.
3.3Wiper Blade Element—The resilient member of the wiper blade that contacts the windshield glazing surface.
3.4Wiper Arm—A device to both interconnect the wiper blade and the output shaft of the wiper motor or linkage
asmbly.
The wiper arm has the dual function of:
a.Maintaining the wiper blade into its desired position throughout the wipe pattern.
b.Exerting a load onto the wiper blade, sufficient for its function.
3.5Linkage Asmbly—The multicomponent member that connects to the wiper motor (where applicable) to
transmit its action into accurate motion for driving the wiper arm.
雷峰日
3.6Wiper Control Valve/Switch—The manually actuated mechanism that allows passage of pneumatic or
electric signal to the wiper motor for activating the wiper system into its various operating or nonoperating modes.
3.7Wiped Area—The specific area on the glazing surface which shall be covered by the effective wiper pattern;
the area developed as being compatible with viewing requirements necessary to operate the types of vehicles listed in Table 1.
3.8Eyellip—A statistical reprentation of the driver's eye location in a motor vehicle, as defined in SAE J941.
For the purpo of this document, the head turn consideration in SAE J941 will not be ud.
3.9Effective Wipe Pattern—That portion of the wet windshield glazing surface which is cleared when the wiper
blade travels through a cycle with system on highest frequency.
3.10Multipiece Windshield—A windshield consisting of two or more windshield glazing surface areas.
3.11Cycle—A cycle shall consist of wiper blade movement during system operation from one extreme of the wipe
pattern to the other extreme and return.
3.12Daylight Opening (DLO)—The term “daylight opening” (DLO) refers to the maximum opening of any glass
aperture which is unobstructed by moldings, masking, or framing.
3.13Light-Duty Vehicle—A light-duty vehicle is a personnel and/or cargo carrying vehicle with basic GVW of
4500kg (10 000 lb) or less (class 1 and 2) and with the basic design intended for both on- and off-highway u.
3.14Medium-Duty Vehicle—A medium-duty vehicle is a personnel and/or cargo carrying vehicle with basic GVW
of 4500 kg (10 000 lb) to 11 800 kg (26 000 lb) (class 3 to 6) and with the basic design intended for both on-and off-highway u.3.15Heavy-Duty Vehicle—A heavy-duty vehicle is a personnel and/or cargo carrying vehicle with basic GVW of
11801 kg (26 001 lb) or greater (class 7 and 8) and with the basic design intended for both on- and off-highway u.3.16Pasnger Carrying Derivative—A pasnger carrying derivative is a vehicle where the basic design, other
than driver windshield relationship, has been modified for the purpo of carrying occupants.
TABLE 1—WIPED AREA VIEWING REQUIREMENTS
Classification F
Dimension
mm F
Dimension
既然这样英文in Area Angle Up,deg
Angle Down,deg
Angle Left,deg Angle Right,deg Truck, CBE and CAE (1)
1.Specifications also cover pasnger carrying derivatives.
0–1020
0–40
A 1051856
B 531453
C 51
10
151020–1270
40–50
A 871856
B 351453
C 3310151270-Up
50-Up
A 691856
B 171453
C 151015Bus, CBE —School and Commercial (2)2.Geometric center of eyellip located 457 mm (18 in) from centerline of vehicle.
1270–1520
50–60
A 7.5222262
B 3222262
超载超限C 1162215Bus, Forward Control, School and Commercial 1270–1520
50–60
A 7141865
B 2111865
C 1111825Forward Control or Multipurpo
All All
A 9 71856
B 4 41453
C 2 21015Light-Duty Utility Vehicle (1)All All燃气热水器和电热水器哪个好
A 7 51649
B 4 31349
C 4 2 813Van,Multistop (1)
Open Open
A 7121858
B 2111556
C 1 61015Trucks, COE
1020-Up
40-Up
A 6 91856
B 1 71453C
1
5
10
15
See SAE J687 for nomenclature. Angles are minimum.
3.17Function—Ability of the wiper system to clear the specified area of the windshield when the system is
operated in accordance with the vehicle manufacturer's instructions.
The FUNCTION requirements are defined as follows:
a.Wiped Area: See 4.1.1
b.Wipe Frequency: See 4.1.2
c.Durability: See 4.1.3
d.Wiped Quality: See 4.2.3
3.18Intermittent—Wiping action consisting of an individual complete sweep (start to start) with an interval between
stop and subquent activation.
3.19Wiper Motor—That mechanism, operated by an external power media/source (electric, pneumatic or
志愿者工作hydraulic), that provides a controlled power to the other components of the system (either by direct drive to the Wiper Arm(s) or to the linkage), and is activated by the Wiper Switch/Value.
4.Requirements
4.1Windshield Wiper System Requirements
4.1.1R EQUIRED W IPED A REA—The minimum windshield wiped area is described by three specific areas on the
exterior windshield glazing surface. The three areas are developed with the vehicle loaded to the manufacturer's ba design load and are identified in Table 1 as areas A, B, and C. Each area has been established using the angles of Table 1 applied as shown in Figure 1. In the side view, the upper and lower boundary of the area is established by the interction of two planes, which are en as lines in the side view tangent to the upper and lower edges of the eyellip, with the windshield glazing surface. The planes are fixed by the angles above and below the XX line. In the plan view the left and right boundary of the area is established by the interction of two vertical planes tangent to the left and right edges of the eyellip with the windshield glazing surface. The planes are fixed by angles to the left and right of the XX line. The areas ud in determining the percentage of wiped area are tho areas on the exterior glazing surface which are not within 25 mm (1 in) of the edge of the daylight opening (pillars, division bar, header, etc.). The percentage is the ratio of wiped area within the defined area to the defined area. Using test procedures established in 6.1, Table 2 for percentages to be wiped.
4.1.2F REQUENCY
a.The windshield wiper system shall be designed to provide two or more frequencies.
b.The highest frequency shall be a minimum of 45 cycles/min.
c.The highest and one lower frequencies shall differ by at least 15 cycles/min.
d.Such lower frequency shall be at least 20 cycles/min.
e.Frequencies must be obtainable under normal vehicle operating conditions regardless of engine speed
and/or engine load, following test procedures and test conditions described in 6.2.
f.If the wiper system is capable of INTERMITTENT OPERATION, operation must be as follows:
1.Upon activation of INTERMITTENT, the wiper will initiate one sweep and then begin counting for the
interval.
2.Upon cancellation of INTERMITTENT, the wiper will complete the sweep and proceed into the PARK
position or to Continuous speed mode.
3.Selecting a Continuous speed mode immediately negates the INTERMITTENT mode.
4.Activation of a programmed WASH feature overrides the INTERMITTENT mode but returns the
Wiper system to the previous mode upon completion of the programmed WASH.
Figure 1—EYELLIPSE TEMPLATE LOCATION (FOR DEFINITION OF DIMENSIONS—SEE SAE J941)
TABLE 2—MINIMUM PERCENT OF WINDSHIELD TO BE WIPED
Windshield Type Area A Area B Area C
One Piece809499
Multipiece657084
4.1.3D URABILITY—Wiping system, except for the blade, and the control valve/switch must remain functional using
test procedures and conditions established in 6.2 per the following durations:
a.Light- and medium-duty vehicles — Trucks, bus, and multipurpo vehicles with GVW to 11 800 kg
(26 000 lb): 1.5 million cycles
b.Heavy-duty trucks/bus — Vehicles with GVW of 11 801 kg (26 001 lb) or greater: 3.0 million cycles
The control valve/switch, when using the same test procedure and conditions will, during the test, be activated/deactivated the following minimum cycles:
5000 cycles for a 1.5 million cycle wiper system
10 000 cycles for a 3 million cycle wiper system
NOTE—Any component failure, except the wiper blade during this test, denotes system failure. Throughout this test and at the completion of such:
1.Wipe angles as measured on the high speed tting with wet glass must allow compliance with vision
area specification and should not exceed the DLO (unless specifically designed to do so).
2.All components must remain without permanent t or distortion which would impair function of the
wiper system or result in damage to the windshield surface or to metal/nonmetallic exterior surface.
3.Support members onto which the wiper motor and bracket, the linkage and pivot asmblies are
mounted must remain without permanent t, distortion, crazing, fatigue cracking, etc., that affect
either performance of the wiper system or cau failure of such.
