This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Oxygen Enriching Membranes for Reduced Cold Start Emissions
Technical Paper
1999-01-1232
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Nearly 80% of all emissions from an automobile during the Federal Test Procedure (FTP) occur within the first two minutes of the test because the engine is running rich and the catalyst has not reached peak operating temperature. Research at Compact Membrane Systems, Inc. have proven the benefit of using the engine's natural vacuum to drive a membrane module to supply Oxygen Enriched Air (OEA) during initial start up. The benefit of the OEA has shown to decrease emissions of carbon monoxide (CO) and hydrocarbons (HC). In addition, OEA helps to maintain the combustion flame stability when the engine is operated in a lean mode or at a low engine speed. There is evidence that OEA may also account for to a shorter warmer up time for the catalyst.
A 3 inch diameter by 9 inch long module, (7.5 cm dia. × 23 cm) with a small regenerative blower, was installed to an accessory port on the intake manifold of a truck engine. A 30 second idle period was run on the engine and exhaust emissions were recorded. When the engine was supplied 23% and 25% OEA, a reduction of 25-50% in HCs and CO were realized with no measurable loss in power.
Recommended Content
Authors
Citation
Callaghan, K., Nemser, S., and Johanson, W., "Oxygen Enriching Membranes for Reduced Cold Start Emissions," SAE Technical Paper 1999-01-1232, 1999, https://doi.org/10.4271/1999-01-1232.Also In
References
- Poola, R.B. Sekar R.R. Ng H.K. “Evaluation of Oxygen-Enrichment System for Alternative Fuel Vehicles” December 1995
- Stork, K. Poola R. “Membrane-Based Air Composition Control for Light-Duty Diesel Vehicles: A Benefit and Cost Assessment” October 1998