Vehicle Definition and 411 Threads

Today i learned where to find the Toyota paint code. It's on the VIN sticker which is on driver's side doorjamb. Bottom left corner of the sticker has a "T/C" followed by a 3 character code. If anybody needs some touchup paint for a gray Toyota with code 1H5 i have a fresh 1 oz vial that i will...

Greg Bernhardt submitted a new blog post When Vehicle Power Dictates Acceleration Continue reading the Original Blog Post.

I think it would be great if cars software could historize data such as speed, using turn signals, etc which can be used in court to prove/disprove if someone was in fact speeding or didn’t use their turn signal. Why haven’t companies moved this way yet?

Homework Statement Two-thirds of the weight of a 2000 kg car rests on the drive wheels. What is the maximum acceleration of this car on a concrete surface? Homework EquationsThe Attempt at a Solution Shouldnt I have been provided mu, the coeeficient for friction? Its a mastering physics...

Hello, all - A question has come back to tickle my brain. Could a vehicle with less than 1G of thrust manage to escape the Earth's gravity well? I'm thinking something like Space X's Falcon 9. As it landed, with just a little more thrust, it could go back up again, I would guess. So, if it...

So cars usually specify the batteries in kWh (rather than Ah). So given that i know the kWh capacity of a car. I also know the charging effect in W (i.e. the voltage and amps in my charging station). Can I reasonably estimate the time it'll take to charge the battery? It doesn't have to be...

Hello, From what I understand, when you put your car from Drive to Park, you put stress on the transmission. I have been parking in the following order: Use Parking Brake -> Put car into neutral -> Put car into park. Is this the best way to preserve my vehicle's transmission? Or is there a...

Homework Statement In order for a vehicle (wheel) of radius r [m] and mass m [kg] to move at speed v [m/s], horizontal force F [N] should be applied at its axis. Find torque τ [N⋅m], equal to that force that must be applied on the hub. Homework Equations torque τ = r × F The Attempt at a...

I recently saw the video of the frog being levitated with a big magnet. Would it be possible to flip the magnet over and use it to levitate a vehicle? How much energy would it take to levitate, say, a 1000kg vehicle above a dry lakebed?

Hi All, The ECU on my motor bike allows you to select different amounts of engine braking in it's various riding modes. I imagine that the ECU just opens up the throttle bodies a little so that at closed throttle the engine still delivers a bit of torque. Doing this will increase the idle speed...

Homework Statement A truck is moving at constant velocity. A rock is dropped from a storage compartment located at the midpoint of the ceiling of the truck. Where does the rock land on the floor. 2. Homework Equations Ax=0 The Attempt at a Solution [/B] The given answer states that the...

Homework Statement Estimate the rolling resistance force for a 75gram vehicle with axle friction coefficient of 0.2 if the wheel is 40mm diameter and the axle 2mm diameter. I am having trouble with applying the axle friction coefficient. I could not find a similar problem online. Basically...

Hello, I have an problem with mathematical modelling of a special kind of articulated trailer (please have a look at the images: 1st image is the yaw plane and the second is the ZX plane). I have two methods of deriving equations of motion namely Lagrange and Newton-euler to analyse their...

Hi everyone, Just came across this article today and it piqued my interest. I'm not at all an expert in this field but it seems too good to be true so I wanted to see what you thought...

Hello! How can we identify that a car is braking, just by accessing its wheels? I think dynos work like that? Ie they can tell if the torque is negative or positive by touching the spinning wheel? Any hint?

Homework Statement What is the maximum acceleration the train can achieve? Engine effect=6500kW μ(Friction Coefficient (between rails and wheels))=0.45 g=9.82N/kg m(Train weight)=120,000kg α=0 Homework Equations Fμ=Fn*μ Fn=cos(α)*m*g a=F/m The Attempt at a Solution We've used the equations...

Homework Statement Homework EquationsThe Attempt at a Solution [/B] Hi All, I submitted some homework in for marking & received back that on my last question (iii) I had worked out 37.5 wrong, could someone please have a look at my working & advise on where I am making the error. I'm not sure...

Homework Statement A mass of 115kg is to be suspended from a spring. When the mass increases to 575kg, the spring will move. Find the spring constant k. (This is not from a textbook, it is a project problem for a vehicle unloaded and then loaded on the same spring). y1 is the maximum height I...

Hello, I'm trying to make my mousetrap car go very fast. I saw this on youtube . Does this provide any advantage to make it go faster? How would you implement a compound lever to a mousetrap car?

Forgive me if I have not posted this in the right place but I have a quick question. Say if you have a trailer on a truck, let's say a semi trailer, that has 2 axles on it. You measure the stopping distance from a certain speed. You then add another axle to the trailer that has brakes on it with...

Hi.. i am working on a developemnt of electric vehicle as my final year project..i have calculated the max. power required by 800 kg vehicle is 30 kw.. so i am using 30 kw 3 phase AC induction motor.. now can you please help me out in sizing my battery pack.. weight : 800kg max. velocity : 80...

I'm sorry if I am intruding on this forum, but I have a question that requires a knowledge of physics. I am preparing a plan now to convert a school bus into an RV. I have raised tropical fish all of my life and would like to keep doing so. I want to put a 125 aquarium in my RV so that it is...

In the hottest of hot real estate markets you may see a house price go up 1x over 5 years and the owner may be able to capture 0.75x of that (after we subtract costs of property taxes, remodels, HOA dues, etc.). On the other hand, during a Bull Market in stocks there is the potential to for your...

1200lb total vehicle weight 800lb total flywheel mass [4x200ea] Diameter 18.75" Flywheel RPM 3500 [120v electric motor plugged into wall] Pulley to drive wheel at 1:1 [6"pulley] or to 12' pulley Please help write the end of this story before I start. This is a "rev up" car built for...

Would it be possible to engineer a self-charging vehicle... Harnessing kinetic, solar, and wind energy?

So, recently I've been interested in the SLS - renewed particularly on hearing it'll launch this year for the first time. That's super exciting news. But looking into it (and building a replica of one in Realism Overhaul of Kerbal Space Program...), I found the ICPS (Interim Cryogenic...

I am currently working on designing a drive system for a vehicle, and I am calulating the necessary torque to accelerate a vehicle. I am using the guidelines of this source: http://www2.mae.ufl.edu/designlab/motors/EML2322L%20Drive%20Wheel%20Motor%20Torque%20Calculations.pdf I still feel that...

Hi guys hoping someone is able to answer this albeit a estimated reply. I am trying to figure out the speed I was hit at in a recent accident. I was stationary at a junction (vehicle weight aproz 1470kg) foot on brake was hit from behind (vehicle weight aprox 2000kg) was hit full on driver did...

<Moved from a technical forum. Therefore no template.>I am currently analysing the forces acting on a moving vehicle. The vehicle is mounted on a rail with wheels on both upper and lower side of the rail with a spring increasing the reaction force, and thereby the friction. The vehicle should be...

Hi Great Engineers, Need you help. I am required to calculate drag load on sticker to ensure it is not peeling off in operation. The vehicle may moves as fast as 220 km/hr with rectangular sticker size of 30 cm x 40 cm, thickness 0.0635 mm on its body. Wind direction is parallel to 40 cm length...

So I have a strange question. I study snakes, which are of course sensitive to vibrations in the ground. A common technique for finding snakes is to drive roads at night. A constant debate that comes up among herpetologists is whether or not the vibrations of the vehicle are causing the snakes...

When doing work on the brakes of a car or bicycle, how much of that energy is actually removed from the total kinetic energy of the vehicle? What is the most efficient braking system?

This is my first post and am curious if anybody here has any experience or advice on how to discharge a capacitor bank with 6 1F capacitors connected in parallel. I built a electric hybrid (basically electric transmission) vehicle that uses a 31hp gas engine to power a 23kW (peak) DC generator...

Hello Everyone I have got a question concerning the calculation of the overall energy input in random vehicle vibration tests. I have got different power spectral density levels for different random vehicle vibration tests and would like to compare them with each other concerning the overall...

Here is my question and please tell what is wrong in this? So let's think that we have rail and we move Somekind batteries in this rail and we have also solar elements to get energy to power this rail system and a lamp to throw out enregy from this thing that we move. And what we move is...

Hello! I found how to calculate here: http://liionbms.com/php/precharge.php But the problem is, that when I used online calculator, it gives me that with resistance 531, my charging time to 288V will be about 2.3 seconds instead 5 seconds, that I need. Online calculator here...

Homework Statement I've gone though a material selection process to pick the optimum material for a rear leaf spring suspension for a vehicle (~700mm long) and I've selected the top 10 materials based on fatigue, fracture, toughness, cost, yield etc: -Stainless steel, martensitic, AISI 440B...

Homework Statement Inside a NASA test vehicle, a 3.50-kg ball is pulled along by a horizontal ideal spring fixed to a friction-free table. The force constant of the spring is 226 N/m . The vehicle has a steady acceleration of 5.00 m/s2, and the ball is not oscillating. Suddenly, when the...

greetings, here I found a Simulink model on mathswork, I want to replace the battery with a fuel cell, so I'm stuck at the level of the energy management block. here is the link of the model: https://www.mathworks.com/matlabcentral/fileexchange/28441-hybrid-electric-vehicle-model-in-simulink...

How can we calculate the speed of a vehicle from pedestrian throw distance ? If the weight of a vehicle is 1220 kg and a pedestrian's weight is 72 kg. Throw distance is 20.70 meters.

Homework Statement Determine the maximum velocity attainable by a vehicle with the following conditions: RWD 6% grade Weight = 20 kN CG is 1.25 m behind front axle and 0.5 m above ground level. Wheel base is 2.8 m. Effective rolling radius of wheel = 30 cm Coefficient of aerodynamic drag =...

Homework Statement Determine the maximum velocity attainable by a vehicle with the following conditions: RWD 6% grade Weight = 20 kN CG is 1.25 m behind front axle and 0.5 m above ground level. Wheel base is 2.8 m. Effective rolling radius of wheel = 30 cm Coefficient of aerodynamic drag =...

Does anyone know how to calculate how much force (or wind) a moving vehicle generate? I am trying to figure out how much wind does a moving car (or any vehicle) generate when traveling at certain speed.

The situation in a recent motor vehicle accident : An 850-lb motorcycle-plus-driver strikes a 2850-pound car-plus-driver on the passenger side with enough force to completely overturn it (in other words lift it completely off the ground and onto its roof), that car's momentum then enough to...

Im starting to learn about vehicle dynamics by watching video lectures here , and also reading the books by Gillepsie and Jazar. I´ve got a fundamental question about the FBD of the vehicle. According to Gillepsie :http://imgur.com/a/lGXxw http://imgur.com/a/lGXxw The vehicle is...

Hello all, I'm building a miniature vehicle and plan on using a DC motor that supposedly spins at 12800 rpm (1340 rad/s) for the engine. However, I'm a little confused as to what the car's acceleration would be. The DC motor on its own would instantaneously have an angular velocity of 1340...

I'm modelling a car in a simulator for fun. The sim's method of acceleration is to apply a force in Newtons on a selected wheel. I've browsed a few topics and whilst some come close there doesn't seem to be any equations that takes into account geartrains. Also I'm fuzzy on the relationship...

Hello Everyone, I am designing Simulink model for HIL testing. Basic concept: Input: Throttle angle ----> Injection timing from that I have calculated requested torque (% of max torque)(chekced and correct) Real torque follows requested torque with delay. (long list of conditions depending on...

Lets say we have a car with no engine, just a shell. We want to create an extremely efficient electric vehicle. If we have unlimited resources and man power how would you go about making this vehicle?

Hi! Well, I'm programming a vehicle's physics, and I have trouble finding a way to calculate Rolling resistance, though i searched a lot. I already have the Traction Force and the Drag Force, but now I need Rolling Resistance. The best thing i found is that Froll = Croll * P, where Croll is the...