静止摩托车排放声级的测量

[中文适用范围]： 本 SAE 标准建立了用于确定静止条件下摩托车排气声压级的测试程序@环境@和仪器。自首次发布@以来，它已成功应用于非公路车辆声压级的调节和监测@，并且仍然是其推荐应用。用于公路摩托车声压级路边执法的 SAE J1287 用户报告了在该应用中实施的困难。为此，开发了 SAE J2825，并建议用于测量固定式公路摩托车的排气声压级。必须注意不要将固定声压级与摩托车总声压级混淆。该测试不评估摩托车运行期间的总声音。为此，建议使用@ SAE J331 或 SAE J47。根据 SAE J1287 针对排气声压级设置的任何允许声音限值 (dBA) 不应与根据美国联邦法规 @ 40 第 205 部分中规定的 EPA 要求的总声压级允许声音限值 (dBA) 相冲突。 [外文原描述]： This SAE Standard establishes the test procedure, environment, and instrumentation for determining the exhaust sound pressure levels of motorcycles under stationary conditions. Since initial publication, it has been successfully applied to regulation and monitoring of sound pressure levels of off-highway vehicles, and that remains its recommended application. Users of SAE J1287 for the purpose of roadside enforcement of sound pressure levels for on-highway motorcycles have reported difficulties with its implementation in that application. In response, SAE J2825 was developed, and is recommended for measurement of exhaust sound pressure levels of stationary on-highway motorcycles. Care must be taken not to confuse stationary sound pressure levels with total motorcycle sound pressure levels. This test does not evaluate total motorcycle sound during operation. For this purpose, SAE J331 or SAE J47 is recommended. Any allowable sound limits (dBA) set in relation to SAE J1287 for exhaust sound pressure level should not conflict with the allowable sound limits (dBA) for total sound pressure level per the EPA requirements specified in the US Code of Federal Regulations, 40 Part 205.Cross Reference: ANSIS1.4,ANSIS1.40,J1349,J184_201408,J213_201409,J331_202007,J47_202006,TSB002_201411