A Study of Thermal Energy Conservation in Exhaust Pipes

Format:

Conference/Event

Author/Creator:

Robertson, Gerald F., author.

Conference Name:

1979 Automotive Engineering Congress and Exposition (1979-02-26 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1979

Summary:

The emissions of hydrocarbons (HC) and carbon monoxide (CO) from a vehicle can be decreased by obtaining faster warmup of the catalytic converter. An experimental study of the consequences of effectively internally insulating an exhaust pipe has demonstrated (1) a significant increase in converter-inlet gas temperature during warmup, and (2) a lowering of HC and CO emissions on the Federal Test Procedure by about 15% on one particular vehicle. A mathematical model has been developed and verified to predict converter-inlet temperature histories from known exhaust-takedown temperature histories and to quantify the effects of various insulation material properties on the temperature of the gas entering the converter. The dangers of drawing misleading conclusions from tests of exhaust pipe insulation are discussed

Notes:

Vendor supplied data

Publisher Number:

790307

Access Restriction:

Restricted for use by site license