PULSAIR-A METHOD FOR EXHAUST SYSTEM INDUCTION OF SECONDARY AIR FOR EMISSION CONTROL

The Pulsair concept utilizes inherent exhaust system pressure pulsations to induce secondary air into reciprocating engine exhaust ports for oxidation of unburned hydrocarbons and carbon monoxide. High-speed check valves are actuated by subambient exhaust pressures which arise from reflected exhaust "blowdown" pressure waves. Experiments with V-8 engines and simple acoustic wave theory have been used to define system fundamentals and design techniques for obtaining high induced airflow rates at specified engine speeds. Procedures are outlined for adapting the concept to L-4, and V-6 engines. /GMRL/

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Gast, R A
• Publication Date: 1975-2

Media Info

• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Air; Air quality management; Carbon monoxide; Design; Exhaust gases; Flow; Hydrocarbons; Machine valves; Oxidation; Pressure; Speed
• Uncontrolled Terms: Air flow
• Subject Areas: Design; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00099024
• Record Type: Publication
• Report/Paper Numbers: SAE #750172
• Files: TRIS
• Created Date: Oct 18 1975 12:00AM