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Effects of methanol/gasoline blends on hot weather driveability

Conference ·
OSTI ID:6513574
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.
Research Organization:
Toyota Motor Corp.
OSTI ID:
6513574
Report Number(s):
CONF-870204-
Country of Publication:
United States
Language:
English