This SAE Recommended Practice provides a defrosting system performance guideline for trucks@ buses@ and multi-purpose vehicles when tested according to SAE J381 MAY84. It is limited to results of tests that can be conducted 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 described by SAE J381 under actual conditions such a coating would be removed by scraping before driving the vehicle. The performance obtained@ therefore@ does not directly related to actual driving conditions@ but serves as a laboratory performance indicator for comparing test results within or between systems. This SAE Recommended Practice 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.
SAE J382-1984 history
2000SAE J382-2000 Windshield Defrosting Systems Performance Requirements--Trucks, Buses, and Multipurpose Vehicles
1994SAE J382-1994 Windshield Defrosting Systems Performance Requirements--Trucks, Buses, and Multipurpose Vehicles
1984SAE J382-1984 Windshield Defrosting Systems Performance Requirements--Trucks, Buses, and Multipurpose Vehicles
1971SAE J382-1971 WINDSHIELD DEFROSTING SYSTEMS PERFORMANCE REQUIREMENTS - TRUCKS@ BUSES@ AND MULTIPURPOSE VEHICLES