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Comparing accelerated vs constant motion; inspired by real life example. Is reducing mass the way to save energy in vehicle use?

Energy consumption in jerky vs steady motion. An average European car travels 30 km per day in urban areas mostly. This requires starting and stopping due to traffic lights and congestion and results ...
Piotr's user avatar
  • 11
0 votes
2 answers
28 views

Dual-independent turbo engine possibilities

My coach wants to mod his engine, so I was throwing around the idea of possible turbo setups. One that I started to like the idea of was the idea of two turbos, working independently. Is it possible ...
charlie's user avatar
0 votes
0 answers
25 views

Autonomous vehicle lateral control

I am working on a control system for autonomous vehicles, i am using a kinematic bicycle model simulated on matlab simulink and the formula i used for the steering angle is given in the figures below ...
Asmaa GZ's user avatar
1 vote
0 answers
28 views

Custom Rack and Pinion for 1979 Firebird

I am attempting to convert my firebird to a rack and pinion steering system, so I can introduce later modifications. https://www.unisteer.com/products/1975-81-firebird-trans-am-power-rack-and-pinion-...
Noah 's user avatar
  • 111
0 votes
2 answers
92 views

Will car be able to fit in from this gate from front, as well as from rear?

The gate is 8 ft (96 inches) and the road is 10 ft (120 inches). I am not a engineer nor a professional.
Rihdus Smith's user avatar
0 votes
1 answer
43 views

Idea of a continuous Gear system in Cars

Background I randomly had this idea and i was wondoring if could it be a better alternate technology than what we use in cars now, but as i have little knowledge in the enginnering field(i'm a physics ...
Amit Rai's user avatar
  • 103
0 votes
2 answers
220 views

How does stalled diffuser/wing reduce drag at F1 car?

How stalled diffuser/wing reduce drag at F1 car if in aerodynamics stall/separation is always related to increase in drag? Any graph of pressure distribution when diffuser is stalled? From "...
22flower's user avatar
  • 239
0 votes
1 answer
238 views

What width gate for parking 4m car at 90degrees in 10ft offset in front of home?

I have 10x30 feet offset in front of my house where 30 feet is the width of my house. The road in front of house is 20 feet wide (but I can't park on road). I have a bought a 4m long car (MarutiSuzuki ...
Ghan's user avatar
  • 101
1 vote
2 answers
78 views

Where is vertical axis of rotation when we observe car yaw?

Where is located vertical axis of rotation when we observe only car yaw, is this axis at different places for different angles of steering wheels?
22flower's user avatar
  • 239
0 votes
2 answers
158 views

How position of c.g. affects car polar moment of inertia?

How position of c.g. affects polar moment of inertia for car in turn, why all racing cars have engine placed in the middle, has that something with polar moment of inertia?
22flower's user avatar
  • 239
0 votes
1 answer
63 views

Alternatives of rubber sealant cement for finalizing patch-plug repair on car tyre?

I am doing a patch-plug repair for a 2mm puncture injury on my car tire: I have two questions: 1.) The minimum I got at local stores (in India) is a 6mm patch-plug. Do I need to drill/cut the injury ...
Akay's user avatar
  • 101
0 votes
0 answers
23 views

Would it be feasible to use the water vapor produced from hydrogen internal combustion engines to power a steam generator in a car?

In a standard internal combustion engine, exhaust temperatures typically approach 400-500 degrees Celsius for standard applications. If we consider that the primary exhaust gas of hydrogen engines is ...
Anon's user avatar
  • 1
0 votes
1 answer
75 views

How do I find the optimal/best Gear ratios for an 3-speed transmission of an RC car?

[was told to post here, from physics stackexchange] Says it in the title - I've done a bunch of stuff so far, but my work seems to be wrong. I'm trying to build an RC car (pretty small, about 25 cm in ...
bepispasta42069's user avatar
1 vote
1 answer
44 views

Derusting car wheel's control arm by soaking in vinegar?

Would it be safe to remove the built up rust on wheels' control arms by soaking them in vinegar? Or is Hydrogen embrittlement a concern for a run-of-the-mill, 10-years old control arm, which is (I ...
VanillaDonuts's user avatar
0 votes
2 answers
76 views

Why exactly car tires quality affect braking distance?

It is a known fact that car tires' quality/tread depth directly affect the braking distance. I am a little confused about the exact reasons. I can understand how tires with worse quality can lose ...
Mikhail Petrov's user avatar
0 votes
1 answer
96 views

Why does a car generator employs an alternator (i.e. AC) when power supply is provided by a battery (i.e. DC)?

An alternator generates AC current, whereas batteries (as far as I know) provide/are charged with DC current. So I'm wondering, how is this apparent mismatch explained? Do car manufacturers employ a ...
temporary_pigeon's user avatar
2 votes
1 answer
539 views

How can I control my vehicle’s electric power steering system?

I’m trying to add lane keeping assist and adaptive cruise control to my 2017 Chevrolet Camaro, with the ultimate aim of using Comma.ai’s openpilot (or some other fork) to make my car drive itself. ...
Anthony Napodano's user avatar
0 votes
0 answers
30 views

Is this a feasible way to straight-couple to a gear?

I have some car window motors that I would like to directly couple to some roller-type shades in my house. I would like to introduce a direct coupling mechanism rather than use some sort of chain. In ...
user391339's user avatar
1 vote
2 answers
69 views

Why don't cars have manual valve timing?

This really confuses me. On the late steam engines, you let in as much steam as possible to start the engine, and "notch up" as you pick up speed so you waste less fuel. Some stationary ...
Ethan Miller's user avatar
0 votes
1 answer
147 views

Effect of Earth's rotation on moving vehicles

The earth rotates at a rate of 460 m/second. I wish to predict the position and approach for landing an UAV (quadcopter) on the vehicle. I have a free-moving landing platform on vehicle that aligns ...
Tanvi Sawant's user avatar
0 votes
0 answers
35 views

how to calculate drag force (to be used later in the calculation of drag coefficient)

I'm working on a school project for car design (M segment car) we already found an open source Toyota model and can get the final answer online, but I want to know how can I calculate them what's on ...
Abdelrahman Sherif's user avatar
0 votes
4 answers
118 views

How Does the Suspension Work with a Rigid Differential?

This is a basic question, but if a car's wheels are rotated by the drive shaft through the differential, which is a rigid piece of metal with gearing inside, how does the suspension system allow the ...
itisyeetimetoday's user avatar
3 votes
2 answers
167 views

Is the Stop-Start technology detrimental or good for the car?

I found a lot of articles on internet about how bad the stop-start technology is for your car and how it contributes to the faster wear of multiple parts, or how superb the feature is for the Sacred ...
Honza Zidek's user avatar
0 votes
2 answers
571 views

Tire engineering - are "free rolling" and "slip ratio" defined with respect to a specific tire/road material pair?

Pacjeka states the following on his introduction to tire characteristics: The upright wheel rolling freely, that is without applying a driving torque, over a flat level road surface along a straight ...
jvf's user avatar
  • 101
0 votes
1 answer
179 views

How air dam reduce drag and lift?

Few questions about air dam(flexibile vertical plate on front bumper) What is main purpose of air dam in car industry, reduce drag or reduce lift(increase downforce)? How dam reduce drag if : a)...
22flower's user avatar
  • 239
0 votes
2 answers
57 views

How Hard Is It Too Convert A Car To Run An Electric Engine?

With EV's becoming far more popular - In a few years, there will be a time where we will see them in scrap/dismantling yards. Anyway, how hard is it to convert a normal car (let's say a classic) to ...
Frog82's user avatar
  • 101
2 votes
1 answer
130 views

On a car with all-wheel drive, how does the engine provide the angled front wheels with power?

Obviously, a single solid axle connected straight through the wheels would bend if the wheels to which is was connected were to rotate right or left with respect to a vertical line (i.e. be steered). ...
Toasted Uranium's user avatar
-1 votes
2 answers
48 views

Governors and acceleration effect on IC engine

If a car is moving with a constant velocity this means that resistive loads (like air drag friction) should equal the driving force from the car; but I know that the governors always cancel the effect ...
Jesse Flynn's user avatar
0 votes
1 answer
34 views

Can the Dynosheet be read as a Fourier transform of some sorts?

I've done some quick google search on dynosheet, and what it does is that it measures the power output of the car with respect to its frequency. My initial understanding of the dynosheet is that it ...
Tycho BraKet's user avatar
0 votes
3 answers
304 views

Is the effect of weight-to-horsepower ratio linear?

I am wondering if a car that weighs 2,5kg and a engine power output of 1hp would be just as fast when going in a straight line like a 1250kg car with 500hp (they both would have a weight-to-horsepower ...
MarkAKE's user avatar
0 votes
0 answers
264 views

What is the effect of caster angle in automobiles? What will happen if we use neutral caster?

What is the effect of caster angle in automobiles and what will happen if we use neutral caster? We study that positive caster makes vehicle more stable at high speeds. It increases lean while ...
Ibrahim Omer's user avatar
1 vote
1 answer
265 views

Where is best place to install vortex generators if race car diffuser stall?

If flow separate in high AoA diffuser, vortex generators can help to delay separation. Where is best palce to install VG for flat floor + diffuser configuration , in front leading edge of diffuser or ...
22flower's user avatar
  • 239
0 votes
3 answers
312 views

Question about torque in car engines

Sometimes people say "The engine of Car A has a higher torque than Car B with both having the same horsepower" My question is : if both cars are equal in horsepower can't we just avail this ...
Jesse Flynn's user avatar
0 votes
3 answers
95 views

Increasing air velocity through F1 car diffuser

I am looking into F1 car aerodynamics for a course that I am taking. I understand that because of Bernoulli's law, when the velocity increases, the pressure decreases, which is good for F1 cars if we ...
Spinnaker's user avatar
8 votes
6 answers
4k views

When a car with an open differential turns, why does the inner wheel slow down and the outer wheel speed up?

I asked this in the physics stack but hopefully will get more interest here. So I understand that when driving on a curved path, the inner wheel must travel a shorter distance than the outer wheel. ...
Reese's user avatar
  • 93
-1 votes
4 answers
42 views

Time period of charging a mobile phone via car

As car batteries provide only 12 V instead of ~230-250 V, I assume it takes much longer to charge them compared to a common wall socket?
Ben's user avatar
  • 123
1 vote
2 answers
59 views

How does one deal with indeterminacy in modeling the motion of vehicles with multiple wheels? (Dynamics Question)

Consider a vehicle with four wheels and suspension (coil and dampers) rolling over an arbitrary surface. What would be the magnitude (not direction) of the normal force on each wheel? Is there a ...
Naveen Tayyebi's user avatar
-2 votes
2 answers
106 views

How can a car travelling at a higher speed may cause it to lift off from the ground?

Many Sports cars and other high speed and performance ground vehicles have a rear wing attached to its rear, and a splitter attached to its front. From what I understand, the rear wing (which takes ...
Rameez Ul Haq's user avatar
0 votes
1 answer
174 views

How does Kia charge the high-voltage battery in EV mode?

I recently bought a Kia Ceed 2020 PHEV (Plug-in Hybrid Electric Vehicle). Its specs mention a 6-gear Dual-Clutch Transmission (DCT), a 105 kW Internal Combustion Engine (ICE) and a 44 kW Motor-...
user1202136's user avatar
4 votes
3 answers
237 views

How does my automatic car shift without complete temporary loss of acceleration

When my car shifts gears, the car's acceleration never goes to 0. I feel that there is constant torque to the wheels throughout the entire shift. How is this possible during a gear change? ...
Ardalan G.'s user avatar
5 votes
1 answer
93 views

Is there a way to estimate whether the driver or co-driver picks up the smartphone?

First of all, as I am new in this very corner of stack exchange please help me by selecting the correct tags! I'm interested in finding an alorithm, that estimates wether a phone is picked up from the ...
Dennis Heinig's user avatar
-1 votes
1 answer
154 views

What is pitch stability in cars?

Can reduction in pitching moment of a car be referred to as improved pitch stability? Or is this term strictly only with regards to aircrafts?
Nerdforferraris's user avatar
-2 votes
1 answer
49 views

If body roll of a car is reduced, is the load or weight transfer reduced too?

Will the load transfer or weight transfer be reduced because the body roll is reduced due to stiffening of the suspension ?
Nerdforferraris's user avatar
1 vote
1 answer
130 views

Does a single-wheel brake intervention from ESC cause one wheel to be not brakeable by the driver?

Source: https://www.kfz-tech.de/Engl/Buchprojekte/HBremse/ESP3.htm Firstly, I don't know if this is the right StackExchange, but I will try nevertheless. Above I posted a picture of the hydraulic ...
birdfreeyahoo's user avatar
-1 votes
2 answers
383 views

Does lowering the ride height of a car 50 mm exactly lower the height of C.G by 50 mm?

Does lowering the ride height of a car $50\ mm$ exactly lower the height of C.G. by $50\ mm$ or is it higher?
Nerdforferraris's user avatar
0 votes
0 answers
66 views

How come my calculated engine torque is so much less than the manufacturer's specifications?

Here are my calculations. Am I doing anything wrong?
Ardalan G.'s user avatar
0 votes
1 answer
1k views

Calculating final drive force from engine torque and tyre spin ratio

Trying to build a simplified physics simulation for cars, along the lines of "Car Physics" by Marco Monster. I'm stuck at straight line acceleration. I don't know if I understand the ...
Paco1's user avatar
  • 103
-1 votes
1 answer
66 views

Why do all cars seem to use "reflective" paint?

I'm not just talking about "chromed" parts. I mean the whole "paintjob", which seems to be be designed to reflect the environment as to basically be a mirror (somewhat depending on the color). I don'...
Allene Cser's user avatar
0 votes
2 answers
47 views

Meeting point of turning wheels with rear wheels

I was watching this video about how steering on a vehicle. It states: If you track the meeting point of the left and right wheels, you can see that the meeting point always lies on the rear wheel ...
Lachlan Etherton's user avatar
-1 votes
1 answer
68 views

Does the shape of a car really matter for how much gasoline it drinks?

Let's say that we have a mid-1950s "gas guzzler". Now, we take away the exterior "shell"/chassis and replace it with a modern car's. That is, it will visually look just like a modern car from the ...
Joshu's user avatar
  • 1