标准编号：ISO 9249:2007
中文名称：土方机械 发动机试验规程 净功率
英文名称：Earth-moving machinery — Engine test code — Net power
发布日期：2007-11
标准范围
This International Standard specifies a method for testing the net power of internal combustion enginesintended for the propulsion of earth-moving machinery as defined in ISO 6165. It is intended to provide astandardized means of reporting net power values to the end user of the earth-moving machines. It isapplicable toa) RIC spark- or compression-ignition engines but excluding free piston engines,b) rotary piston engines.These engines may be naturally aspirated or pressure-charged using either a mechanical pressure-charger ora turbocharger.NOTE This International Standard is a companion standard to ISO 14396. The principle differences between the twois the fitting of certain cooling equipment and pressure-charging equipment auxiliaries (fans) for the test. It is possible todeduct the power requirements of equipment and auxiliaries from the engine ratings of ISO 14396 by test or calculationmethods. See Annex A for the preferred calculation method for obtaining the net power ratings according to thisInternational Standard. Both the test and the calculation method comply with this International Standard.
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