What factors affect fuel consumption and speed in road vehicles?

AI Thread Summary
Fuel consumption during a journey is influenced by the speed of the vehicle, with instantaneous fuel consumption being proportional to engine power. The discussion focuses on comparing fuel usage at two constant speeds while ignoring rolling resistance and only considering air drag. The total fuel used is calculated using the formula of power multiplied by time. For those interested in deeper insights, the book "Road Vehicle Performance: Methods of Measurement and Calculation" by George Gordon Lucas is recommended, specifically volume 7. Understanding these factors is crucial for optimizing fuel efficiency in road vehicles.
dean barry
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I was wondering about the amount of fuel used for a given journey.
My model is that the same journey is made at two different constant speeds
I have assumed that instantaneous fuel consumption is proportional to the power produced by the engine at that point.
I an ignoring rolling resistance losses, and considering air drag only.
I have used power * time as a base for total amount of fuel used for each journey
Any comments ?
 
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