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GB 18285—2005《点燃式发动机汽车排气污染物排放限值及测量方法(双怠速法及简易工况法)》自2005年7月1日开始实施,该标准适用于装用点燃式发动机的新生产和在用汽车,其中规定了点燃式发动机汽车的3种简易工况测量方法:稳态工况法(ASM)、瞬态工况法(IM195)和简易瞬态工况法(VMAS)。北京市、江苏省采用稳态工况法,辽宁省、山东省、浙江省、广州市等省市采用简易瞬态工况法。浙江省于2008年发布DB 33/660—2008《在用点
GB 18285-2005 Limits and Measurement Methods of Emission of Exhaust Pollutants from Ignition Engines Vehicles (Double-idling Method and Simple Condition Method) has been implemented since July 1, 2005. This standard is applicable to new (ASM), transient operating conditions (IM195) and simple transient operating conditions (VMAS) for the production and use of motor vehicles. Beijing, Jiangsu Province, the steady-state operating conditions, Liaoning Province, Shandong Province, Zhejiang Province, Guangzhou City and other provinces and cities using simple transient conditions. Zhejiang Province in 2008 released DB 33 / 660-2008 "in use