Relationship Between MTBE-Blended Gasoline Properties and Warm-Up Driveability

952519

10/01/1995

Event
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
The relationship between MTBE-blended gasoline properties and warm-up driveability is investigated by focusing on the transient combustion air-fuel ratio that strongly relates to the combustion state of the engine. As a result, although warm-up driveability of MTBE-free gasoline has a high correlation with 50% distillation temperature (T50) and a high correlation with 100°C distillation volume (E100), the correlation is found to be low when blended with MTBE. Various formulas that improve correlation with peak excess air ratio (λ) by correcting T50 and E100 for the amount of MTBE blended are examined. The formula for which the highest determination coefficient is obtained is proposed as a new driveability index (DI) that can also be applied to MTBE-blended gasoline. In addition, the effect on driveability by gasoline base materials using this new DI also is investigated. The results indicate that the new DI worsen when heavy reformate containing large amounts of aromatics or MTBE, an oxygen-containing compound, is used for the octane improver, leaving the balance of the volatility out of consideration.
Meta TagsDetails
DOI
https://doi.org/10.4271/952519
Pages
7
Citation
Suzawa, T., Yamaguchi, K., Kashiwabara, K., Fujisawa, N. et al., "Relationship Between MTBE-Blended Gasoline Properties and Warm-Up Driveability," SAE Technical Paper 952519, 1995, https://doi.org/10.4271/952519.
Additional Details
Publisher
Published
Oct 1, 1995
Product Code
952519
Content Type
Technical Paper
Language
English