DEVELOPMENT OF A PROPORTIONAL SAMPLER FOR AUTOMOBILE EXHAUST EMISSIONS TESTING

The report describes the development of a device that is capable of sampling gaseous emissions from automobiles. The device samples exhaust gases at a mass rate that is proportional to the total exhaust gas mass flow rate, which is measured using an ultrasonic vortex flowmeter. The flowmeter delivers signals, which are conditioned by process control electronics, to a sample valve. Non-standard temperature and pressure conditions at both the vortex flowmeter and the sample valve are compensated for in the process control electronics. The report focuses primarily on development of the vortex flowmeter, the sample valve, and the process control electronics. These three components comprise the heart of the proportional sampling system.

• Corporate Authors:

  Aeronutronic Ford Corporation

  Industrial and Environmental Products Operation
  Newport Beach, CA  United States 

  Environmental Sciences Research Laboratory

  Research Triangle Pk, NC  United States  27711
• Authors:
  • HASKINS, H J
• Publication Date: 1976-6

Media Info

• Pagination: 122 p.

Subject/Index Terms

• TRT Terms: Air pollution; Automobiles; Design; Electronics; Exhaust gases; Flow; Flowmeters; Gases; Process control; Proportioning; Sampling; Ultrasonic tests
• Uncontrolled Terms: Flow rate
• Old TRIS Terms: Air samplers; Gas sampling; Proportional counters
• Subject Areas: Design; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00146765
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EPA/600/2-76/169 Final Rpt.
• Contract Numbers: EPA-68-02-1755
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM