标准摘要
[中文适用范围]： 本推荐实践建立了部分流条件下 PM 测量的测试程序和最佳实践。 PFDS PM 测试和认证主要用于重型应用，如 40 CFR Part 1065 中所述，因为带有稀释通道和 CVS 的全流量采样系统对于大型重型发动机来说可能非常庞大。 40 CFR Part 1066 还允许在轻型应用中使用部分流系统代替全流系统。 PFDS 不需要使用 CVS 采样系统或全流稀释通道。这使得在无法容纳大型 CVS 或全流稀释通道的较小测试单元中执行 PM 测量变得更容易、更方便。本文件描述了 LD 和 HD PFDS 的不同组件/规格，以及确保采样系统完整性所需的质量检查。它还涉及法规批准的许多采样选项和计算。 [外文原描述]： This recommended practice establishes test procedures and best practices for PM measurements under partial flow conditions. PFDS PM testing and certification is primarily used in heavy duty applications as described in 40 CFR Part 1065 because full flow sampling systems with a dilution tunnel and CVS can be very bulky for large heavy duty engines. 40 CFR Part 1066 also allows the use of partial flow systems for light duty applications in lieu of full flow systems. PFDS does not require the use of a CVS sampling system or a full flow dilution tunnel. This makes it easier and more convenient to perform PM measurement in smaller test cells that cannot fit a large CVS or a full flow dilution tunnel. This document describes the different components/specifications of LD and HD PFDS as well as the required quality checks necessary to ensure the integrity of the sampling system. It also addresses the many sampling options and calculations that are approved by the regulations. Correlation between partial and full flow systems will also be discussed.
英文名称Recommended Practice for Partial Flow Dilution System Measurement of Particulate Matter (PM)