The scope of this SAE Recommended Practice is to establish uniform test procedures and minimum performance requirements for passenger car windshield defrosting systems. It is limited to tests that can be conducted on uniform test equipment in commercially available laboratory facilities. The test procedures and minimum performance requirements out-lined herein reflect the extensive knowledge and experience which automotive engineers have accumulated in development of windshield defrosting practices. Current engineering practice prescribes that for laboratory evaluation of defroster systems an ice coating@ rather than frost@ be applied to the windshield to provide more uniform and repeatable test results@ frost formation of uniform density being the more difficult to accomplish. The time element for ice removal@ therefore@ is longer than that required to remove frost@ which is the prime purpose of the defroster system. In accordance with established policies of the SAE Technical Board@ all portions of this recommended practice will be reviewed and revised to reflect technological progress regarding vehicle defroster performance. NOTE: Because of such differing factors as greater vehicle size@ engine operating characteristics@ windshield configuration@ etc.@ a separate SAE recommended Practice is under development covering test procedures and requirements for defrosting systems of trucks@ multi-purpose vehicles@ and buses.
SAE J902A-1967 history
2019SAE J902-2019 Passenger Car Windshield Defrosting Systems
2011SAE J902-2011 Passenger Car Windshield Demisting and Defrosting Systems
2003SAE J902-2003 Passenger Car Windshield Defrosting Systems
1999SAE J902-1999 Passenger Car Windshield Defrosting Systems
1993SAE J902-1993 Passenger Car Windshield Defrosting Systems
1984SAE J902-1984 Passenger Car Windshield Defrosting Systems
1967SAE J902A-1967 Passenger Car Windshield Defrosting Systems
1964SAE J902-1964 Passenger Car Windshield Defrosting Systems