Product Code:SAE J1339
Title:Test Method for Measuring Performance of Engine Cooling Fans
Issuing Committee:Cooling Systems Standards Committee
Scope:This SAE recommended Practice is intended for use in testing and evaluating the approximate performance of engine cooling fans. This performance would include flow, pressure, and power. This flow and pressure information would then be used to estimate the engine cooling performance. This power consumption would then be used to estimate net engine power per SAE J1349. The procedure also provides a general description of equipment necessary to measure the approximate fan performance.The test conditions in the procedure generally will not match those of the installation for which cooling and fuel consumption information is desired. The performance of a given fan depends on the geometric details of the installation, including the shroud and its clearance. These details should be duplicated in the test setup if accurate performance measurement is expected. The performance at a given air density and speed also depend on the volumetric flow rate, or the pressure rise across the fan, since these two parameters are mutually dependent. These parameters depend on the pressure drop across the radiator core and the ram pressure due to vehicle motion. For these reasons, the test procedure should be recognized as providing only an approximate measure of installed fan performance.Although the test procedure is based on running the fan with a motoring dynamometer, the actual installation can be used as a test fixture if an accurate torque meter is available. In this case, the same qualifications discussed apply. Finally, for the effect of a fan clutch in reducing fan use and power consumption, which is not a part of this procedure, refer to SAE J1342.【英文标准名称】:Audio,videoandaudiovisualsystems;interconnectionsandmatchingvalues;part3:interfacefortheinterconnectionofENGcamerasandportableVTRsusingnon-compositesignals,for625lines/50fieldsystems(IEC60933-3:1992);GermanversionEN60933-3
【原文标准名称】:音频、视频和视听设备.互连和匹配值.第3部分:625行/50场制非复合信号电子新闻采集摄像机和便携式录像机接口
【标准号】:DINEN60933-3-1993
【标准状态】:现行
【国别】:德国
【发布日期】:1993-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:电视工程;磁带技术;磁带记录;视听设备;记录设备;声信号;紧固件;磁带录像机;电声学;信号;视频记录;插接件连接;摄影机;电影摄影机;电插头;特性;电性质和电现象
【英文主题词】:Acousticsignals;Audiosystems;Audiovisualequipment;Cameras;Connections;Connectoredjoints;Electricplugs;Electricalpropertiesandphenomena;Electroacoustics;Fasteners;Interfaces(dataprocessing);Magnetictaperecordings;Magnetictapetechniques;Motion-picturecameras;Properties;Recordingequipment;Signals;Videocameras;Videoengineering;Videorecording;Videosignalrecording;Videosignals;Videotaperecorders
【摘要】:
【中国标准分类号】:M70
【国际标准分类号】:33_160_40
【页数】:7P.;A4
【正文语种】:德语