A Novel Strategy for Fast Catalyst Light-Off without the Use of an Air Pump Massachusetts Institute of Technology

Format:

Conference/Event

Author/Creator:

Lang, Kevin R., author.

Conference Name:

2007 Fuels and Emissions Conference (2007-01-23 : Cape Town, South Africa)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

A novel engine management strategy for achieving fast catalyst light-off without the use of an exhaust air pump in a port-fuel-injected, spark ignition engine was developed. A conventional 4-cylinder engine was operated with three cylinders running rich and the fourth one as an air pump to supply air to the exhaust manifold. Under steady-state cold coolant conditions, this strategy achieved near total oxidation of CO and HC with sufficiently retarded spark timing, resulting in a 400% increase in feedgas enthalpy flow and a 90% reduction in feedgas HC emissions compared to conventional operation. The strategy was also evaluated for crank starts. Using the existing engine hardware, implementing the strategy resulted in a reduction in catalyst light-off time from 28.0 seconds under conventional operation to 9.1 seconds

Notes:

Vendor supplied data

Publisher Number:

2007-01-0044

Access Restriction:

Restricted for use by site license