SAE J902:2003 pdf download

SAE J902:2003 pdf download Passenger Car Windshield Defrosting Systems
1. Scope—This
SAE Recommended Practice provides a test procedure and performance guideline for evaluating passenger vehicle windshield defrosting systems. It is limited to results of tests that can be conducted on uniform test equipment in commercially available laboratory facilities.
The current engineering practice prescribes that for laboratory evaluation of defroster systems, a known quantity of water shall be sprayed on the windshield to form an ice coating and then melted by the defroster under specific vehicle operating conditions. The procedure provides uniform and repeatable laboratory test results, even though under actual conditions such a coating would be removed by scraping before driving the vehicle. The performance obtained, therefore, does not directly relate to actual driving conditions, but serves as a laboratory performance indicator for comparing test results within or between systems. This document is intended as a guide toward standard practice but may be subject to frequent change to keep pace with experience and technical advances and this should be kept in mind when considering its use.
2. References
2.1 Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwise 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 J826—Devices for Use in Defining and Measuring Vehicle Seating Accommodation
SAE J903c—Passenger Vehicle Windshield Wiper Systems
SAE J941—Motor Vehicle Driver’s Eye Location
SAE J1 100—Motor Vehicle Dimensions
2.2 Related Publications—The following publications are provided for information purposes only and are not a required part of this document.
2.2.1 ISO P UBLICATION —Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002.
ISO 3468—Road vehicles—Windscreen defrosting systems for passenger cars—Test methods
2.2.2 EEC P UBLICATION —Available from UN Economic Commission for Europe, Information Office, Palais des Nations, CH – 1 211 Geneva 10, Switzerland.
EEC Council Directive 78/31 7 on windshield defrost and defog
3. General
3.1 Defrost—Melt frost on the inside or outside, or test ice coating on the outside surface of the glass, with the defroster system.
3.2 Windshield Defroster System—Means intended to defrost the windshield.
3.3 Defrosted Area—That area of the windshield composed of dry, cleared surface and melted, or partially melted (wet), test coating, and excluding that area of the windshield covered with frozen test coating and which is defined and qualified by the following:
3.3.1 The driver’s seat in the rearmost position (see Figure 1.)