Car Driveability Modelling: A Computer Model for the Prediction of Hesitation Under Cold Weather Accelerating Conditions

831755

10/31/1983

Event
1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
Vehicle driveability is a function of gasoline volatility, ambient conditions and engine design. The ability to predict driveability performance from a knowledge of fuel/air mixture temperatures and gasoline properties would greatly assist both fuel and engine development. Accordingly, a model to predict engine hesitation under full-throttle accelerations (a major driveabilty malfunction) has been developed.
Hesitation occurs when the fuel/air mixture reaching the combustion chambers is too lean to burn. Thus the model is based on the calculation of heat flow and air/fuel vapour ratios in the engine inlet manifold. Chassis dynamometer tests for two different cars using a range of fuels and a range of test temperatures have shown that the model gives an accurate prediction of mixture temperatures and engine hesitation under full-throttle conditions.
Meta TagsDetails
DOI
https://doi.org/10.4271/831755
Pages
15
Citation
Pearson, J., Or man, P., and Caddock, B., "Car Driveability Modelling: A Computer Model for the Prediction of Hesitation Under Cold Weather Accelerating Conditions," SAE Technical Paper 831755, 1983, https://doi.org/10.4271/831755.
Additional Details
Publisher
Published
Oct 31, 1983
Product Code
831755
Content Type
Technical Paper
Language
English