Global to push GA events into
skip to main content

Title: Method and apparatus for reducing cold-phase emissions by utilizing oxygen-enriched intake air

An oxygen-enriched air intake control system for an internal combustion engine includes air directing apparatus to control the air flow into the intake of the engine. During normal operation of the engine, ambient air flowing from an air filter of the engine flows through the air directing apparatus into the intake of the engine. In order to decrease the amount of carbon monoxide (CO) and hydrocarbon (HC) emissions that tend to be produced by the engine during a short period of time after the engine is started, the air directing apparatus diverts for a short period of time following the start up of the engine at least a portion of the ambient air from the air filter through a secondary path. The secondary path includes a selectively permeable membrane through which the diverted portion of the ambient air flows. The selectively permeable membrane separates nitrogen and oxygen from the diverted air so that oxygen enriched air containing from about 23% to 25% oxygen by volume is supplied to the intake of the engine.
Inventors:
 [1];  [2];  [3]
  1. (Woodridge, IL)
  2. (Naperville, IL)
  3. (Chicago, IL)
Issue Date:
OSTI Identifier:
870985
Assignee:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5636619
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; reducing; cold-phase; emissions; utilizing; oxygen-enriched; intake; air; control; internal; combustion; engine; directing; flow; normal; operation; ambient; flowing; filter; flows; decrease; amount; carbon; monoxide; hydrocarbon; hc; tend; produced; period; time; started; diverts; following; start; portion; secondary; path; selectively; permeable; membrane; diverted; separates; nitrogen; oxygen; enriched; containing; 23; 25; volume; supplied; air filter; air flowing; oxygen enriched; time following; air flows; permeable membrane; ambient air; normal operation; internal combustion; carbon monoxide; air flow; combustion engine; enriched air; air containing; selectively permeable; intake air; oxygen-enriched air; air intake; /123/

Similar records in DOepatents and OSTI.GOV collections: