Motor vehicle engines and off-road vehicles and engines must meet CAA emissions standards. These standards apply to cars, trucks, buses, recreational vehicles and engines, generators, farm and construction machines, lawn and garden equipment, marine engines and locomotives. In addition, the composition of fuels used to operate mobile sources, including gasoline, diesel, ethanol, biodiesel and blends of these fuels, are also regulated under the CAA. Learn more about transportation and air quality.
New vehicles and engines must have an EPA-issued certificate of conformity before import or entry into the United States demonstrating that the engine or vehicle conforms to all applicable emissions requirements. The CAA also requires emissions labels for certified vehicles and engines. See examples of cases and settlements related to vehicles and engines.
Illegal imports. Since 2008, there has been a steady flow of illegally imported uncertified motorcycles, equipment containing small gasoline-powered engines (e.g., generators, mowers, chainsaws, etc.), and recreational vehicles. Uncertified vehicles and engines can emit harmful air pollutants at 30% or more above allowable standards. EPA is working with U.S. Customs to stop illegal vehicles and engines at the ports and requiring exportation. Learn more about importing vehicles and engines.
机动车发动机、越野车和发动机必须符合CAA排放标准。这些标准适用于汽车、卡车、公共汽车、休闲车和发动机、发电机、农场和建筑机械、草坪和花园设备、船用发动机和机车。此外，用于操作移动源的燃料的成分，包括汽油、柴油、乙醇、生物柴油和这些燃料的混合物，也受到CAA的监管。了解更多有关交通和空气质量的信息。
新车和发动机在进口或进入美国之前必须具有美国环保局颁发的合格证书，证明发动机或车辆符合所有适用的排放要求。CAA还要求认证车辆和发动机的排放标签。请参阅与车辆和发动机相关的案例和解决方案示例。
非法进口。自2008年以来，非法进口的未经认证的摩托车、装有小型汽油发动机的设备（如发电机、割草机、链锯等）和休闲车源源不断。未经认证的车辆和发动机可能会排放超过允许标准30%或更多的有害空气污染物。环保局正在与美国海关合作，阻止港口的非法车辆和发动机，并要求出口。了解有关进口车辆和发动机的更多信息。
EPA认证号 Registration Number数字编号：
如果符合EPA认证要求，则EPA会颁发符合通知。
一旦EPA认证确定符合法规要求，将颁发符合通知书给申请企业。通知书上列出的生效日即覆盖的产品可以引入商业的日期。通知书在生产结束时或指定的型式年的12月31日失效，看那个日期更早。多数情况下，通知书的生效日即证书的签发日。
