Questions tagged [automotive-engineering]
The automotive-engineering tag has no usage guidance.
38
questions
13
votes
4
answers
26k
views
How much clearance does a car need when turning a corner?
I am contemplating buying a new car. However, the approach to the underground garage in my apartment has a 90 degree frustrating turn. Given the dimensions of the approach and car, what is the max ...
- 233
9
votes
2
answers
297
views
Why does reducing the amount of emissions control improve the fuel economy of a car?
In addition to power and performance, one of the reasons VW cheated their emissions results was to improve the fuel economy of their cars. Why exactly does this happen?
I'm familiar with cars and how ...
- 93
9
votes
10
answers
7k
views
How can "mpg" be high under low engine load?
Let's say a car at 60 mph requires roughly 20 hp to maintain its speed (i.e., to overcome rolling resistance and drag).
If this car makes 240 hp and gets about 34 mpg (not too unrealistic), how is it ...
- 91
4
votes
3
answers
475
views
What causes Rolling Resistance?
I am currently reading “Fundamentals Of Vehicle Dynamics” by Thomas D. Gillespie.
The author mentions how the asymmetric pressure distribution across the length of the contact patch of a tire while ...
- 352
3
votes
3
answers
1k
views
How to design a vacuum climbing robot
I'm trying to design a mobile robot which has to climb over flat 60° inclined wet glass surfaces.
I was thinking to use a large vacuum system composed by a large fan connected to a brushless motor. ...
- 139
1
vote
2
answers
44
views
Is stroboscope a useful device to control the translational vibrations?
There is few material on net related to stroboscope applications. since it is an optical device, it is best used to control the vibrations of rotary devices like turbine blades electromotors etc.
but ...
- 258
-1
votes
1
answer
143
views
How can I make a needle to turn slowly CW to the final position, then return quickly CCW back to the initial position and to start again turning CW?
What I want is after the needle reaches 60 it should go back to 0 in the way showed in the image
The mechanism should preferably be based on gears which convert a steady continuous rotation to the ...
54
votes
9
answers
22k
views
Why do cars have mirrors for rear view rather than cameras?
Despite having so much technological advancement, I wonder why cars still uses mirrors (right and left side of the driver) for the rear view. These mirrors can be easily replaced by cameras and ...
- 665
14
votes
3
answers
4k
views
What happens when you put the wrong type of fuel in an internal combustion engine?
What happens to the working of petrol engine when it is emptied and filled with diesel or to a diesel engine emptied and filled with petrol? Will the engine be able to operate and, if not, why not?
- 653
9
votes
5
answers
534
views
Why is "regular" gasoline standard instead of something more knock-resistant?
The standard light petroleum distillate for vehicle engines, "regular gasoline," is (or is equivalent to) some mix of heptane (C7) and octane (C8). Higher proportions of C8 are more knock-resistant, ...
- 1,757
6
votes
3
answers
1k
views
Remote start on a car with manual transmission
I'm making a remote starter for a car using a Raspberry Pi. The problem is that the car has a manual transmission. The driver needs to remember to place the gear shift in neutral when parking, ...
- 3,074
6
votes
2
answers
7k
views
Does having 2 engines together increase anything?
If I have a vehicle (V1) with one 100 kW engine and an identical vehicle (V2) with 2 of these 100 kW engines, will this mean that V2 will have double the torque of V1 and double the top speed of V1?
...
- 366
5
votes
4
answers
5k
views
How to simulate car acceleration
I am a high school physics student and I've been trying to simulate the acceleration of a car as it fully accelerates from rest, but I'm finding it's much harder than I thought. Here was my first ...
- 255
5
votes
3
answers
4k
views
Reason of Using exactly 5 Wheel Studs per Wheel
So today when I was taking a taxi and looked at the vehicles, I observed that the majority of the light vehicles (i.e. 16-person minibus/ 4-6 person cars) use 5 (or less frequently, 6) wheels studs ...
- 153
5
votes
1
answer
1k
views
How do I calculate rolling resistance for tire on pavement?
First condition assuming perfect rolling, no slip, from what I understand is that the rolling resistance coefficient can be calculated as the displacement arm of the normal force the tire "feels", in ...
- 151