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
Messages
311
Reaction score
23
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 ?
 
Engineering news on Phys.org

Thread 'Race car suspension Class'

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
View full post »

Thread 'Cantilever help'

I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
View full post »
Thread 'What's the most likely cause for this carbon seal crack?'

Thread 'What's the most likely cause for this carbon seal crack?'

We have a molded carbon graphite seal that is used in an inline axial piston, variable displacement hydraulic pump. One of our customers reported that, when using the “A” parts in the past, they only needed to replace them due to normal wear. However, after switching to our parts, the replacement cycle seems to be much shorter due to “broken” or “cracked” failures. This issue was identified after hydraulic fluid leakage was observed. According to their records, the same problem has occurred...
View full post »

Similar threads

Turbocharger (Physics of Fuel Efficiency)
Replies
6
Views
6K
Engine size/type (ie. 2L inline-4) and fuel consumption
Replies
10
Views
25K
Synhelion -- Using solar heliostat farms to create liquid fuels from Water Vapor and CO2
Replies
7
Views
2K
Fuel consumption,throttle position, engine speed
Replies
2
Views
9K
Limiting factor in design of small gas turbine w/ LOW self sustain speed
Replies
5
Views
2K
How Does Engine Power Affect Fuel Mass Flow Rate in Diesel Engines?
Replies
3
Views
5K
Are there cheap smartcar EVs with electric motors attached to wheels?
Replies
6
Views
2K
What Affects Generator Load and Fuel Consumption?
Replies
6
Views
2K
Physical basis for high-bypass turbofans
Replies
5
Views
5K
Automotive Gasoline Combustion: Basics of Heat, Air, and Fuel Reactions
Replies
11
Views
16K

Hot Threads

Recent Insights

Back
Top