Opacity and Photoacoustic Measurements of Diesel Particle Mass Emissions 820460

We have compared the capabilities of two optical instruments -- a conventional opacity meter and a photoacoustic device developed in our laboratory -- as tools for measurement of diesel particulate emissions. The devices were tested using emissions from several 5.7 ℓ engines operated at various steady-state conditions of speed and load and also over the Federal Test Procedure driving cycle. The photoacoustic instrument is about 10 times more sensitive than the opacity meter. Further, unlike the opacity meter, its calibration to give mass concentration is independent of particle size variations.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.