Tracer Fuel Injection Studies on Exhaust Port Hydrocarbon Oxidation: Part II Drexel Univ

Format:

Book

Conference/Event

Author/Creator:

Yang, Weiying, author.

Conference Name:

CEC/SAE Spring Fuels & Lubricants Meeting & Exposition (2000-06-19 : Paris, France)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

Recently, studies were conducted on a single cylinder, four stroke engine to investigate the effect of temperature and local mixedness on exhaust port hydrocarbon oxidation. To examine the effect of temperature, hydrocarbon tracers (propane, propene, 1-butene, n-butane, and n-pentane) were individually injected into the exhaust port just behind the exhaust valve for operating conditions that provided different exhaust port temperatures. For the local mixedness experiments, tracer mixtures (propane + n-butane, 1-butene + n-butane, propene + n-butane) were injected into the exhaust port just behind either a normal exhaust valve or a shrouded exhaust valve. The concentration of tracers and their reaction products were measured using gas chromatography of samples withdrawn from the exhaust stream. The tracer consumption behavior with changing port temperature confirmed that there is a minimum port temperature for hydrocarbon oxidation. This "cutoff temperature" range is from 1300 - 1500 K depending on the hydrocarbon species, as suggested by previous experimental and modeling studies. The comparison between the tracer concentrations using normal and shrouded exhaust valves shows that increased local mixing significantly increased tracer consumption even for the times and temperatures available in the exhaust portrait

Notes:

Vendor supplied data

Publisher Number:

2000-01-1945

Access Restriction:

Restricted for use by site license