Browse Publications Technical Papers 870368
1987-02-01

Effects of Methanol/Gasoline Blends on Hot Weather Driveability 870368

The effects of methanol/cosolvent/gasoline blends on hot weather driveability are surveyed. Results show that startability after engine-off soak drastically deteriorates in an EFI vehicle. By observing the behavior of the fuel in the delivery pipe during hot-start testing and the injected fuel spray shape at high fuel temperature, the authors confirmed that the main cause of this malfunction was the vapor lock in the injector nozzle.
The relationship between hot weather driveability and fuel properties is discussed. The gasoline volatility expression commonly used to indicate deterioration in hot weather driveability was found to underestimate the increase in volatility of blended fuels at higher temperatures. A suggestion is made for a modification to the expression to include the effects of methanol blending on volatility characteristics at high temperatures so that EFI vehicle hot-startability may be predicted.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

The Effects of Oxygenates on Intermediate Temperature Drivability of 1983/1984 Cars

841382

View Details

TECHNICAL PAPER

Road Trials to Assess the Hot Weather Driveability Characteristics of Gasolines Containing Oxygenates in European Cars

831706

View Details

TECHNICAL PAPER

Gasohol: Laboratory and Fleet Test Evaluation

800892

View Details

X