废气排放测量的定容取样系统

[中文适用范围]： 本 SAE 信息报告描述了采用定容采样器 (CVS) 系统测量乘用车和轻型卡车上安装的汽油发动机废气中各种成分的统一实验室技术。所描述的技术特别涉及采用正排量泵的CVS系统。在 CVS 实践的某些领域，给出了替代程序作为统一实验室技术开发的指南。 [外文原描述]： This SAE Information Report describes uniform laboratory techniques for employing the constant volume sampler (CVS) system in measuring various constituents in the exhaust gas of gasoline engines installed on passenger cars and light trucks. The techniques described relate particularly to CVS systems employing positive displacement pumps. This is essentially an almost obsolete system relative to usage in industry and government. Current practice favors the use of a critical flow venturi to measure the diluted exhaust flow. In some areas of CVS practice, alternative procedures are given as a guide toward development of uniform laboratory techniques.The report includes the following sections:Introduction1 . Scope2 . References2.1 Applicable Publications3 . Definitions4 . Test Equipment4.1 Sampler4.2 Bag Analysis4.3 Modal Analysis4.4 Instrument Operating Procedures4.5 Supplementary Discussions4.6 Tailpipe Connections4.7 Chassis Dynamometer5 . Operating and Calibrating Procedure5.1 Calibration5.2 Operating Procedures6 . Data Analysis6.1 Bag Analysis6.2 Modal Analysis6.3 Background6.4 Fuel Economy7 . Safety8 . NotesCross Reference: J1056