New Emphasis on Fuel Volatility-Effects on Vehicle Warmup with Quick-Release Chokes 720934
Quick-release chokes may become an essential feature of advanced exhaust emission control systems to minimize emissions during warmup. However, quick-release chokes greatly impair warmup driveability when gasolines of conventional volatility are used. Consequently, modifications of gasoline volatility were investigated as one approach to restoring warmup driveability with quick-release chokes.
Warmup driveability of two test cars equipped with quick-release chokes was measured on a chassis dynamometer at 40 and 68 F using fuels with widely different volatility characteristics. Warmup driveability was essentially restored by increasing fuel volatility in the 40-90% ASTM distillation range. Front-end volatility up to the 40% point had very little effect.
Citation: Stebar, R. and Everett, R., "New Emphasis on Fuel Volatility-Effects on Vehicle Warmup with Quick-Release Chokes," SAE Technical Paper 720934, 1972, https://doi.org/10.4271/720934. Download Citation
Author(s):
Russell F. Stebar, Robert L. Everett
Affiliated:
Research Labs., General Motors Corp.
Pages: 10
Event:
National Fuels and Lubricants and Transportation Meetings
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1972 Transactions-V81-A
Related Topics:
Chokes
Emissions control
Starters and starting
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