Vehicle Definition and 411 Threads

I have been thinking of a concept for a class 7-8 semi-tractor trailer that is hybrid electric. The basic idea is a fully electric drive system that propels the truck with electric motors only. A lithium-ion battery pack stores energy for the drive system. A diesel generator provides electricity...

Driver-side low beam was out so I went to the auto parts store to pick up a new one. Well it still won't light up:( Using the ohm setting on a multimeter, you can check standard household light bulbs to see whether or not they are defective. Good light bulb = high resistance, since the filament...

Homework Statement For the following calculations, assume a typical electric car will need to apply a constant forc of 165 N to maintain a typical highway speed of 100 km/hr (27.7778 m/s). A: What power (watts) is needed to maintain this speed? B: What energy (Joules) is needed to travel 100...

Hi, so i have finished this question but I am not sure if I did it right. Could you guys check it and tell me if its right or show me where i went wrong. This is the question: A space vehicle traveling At a velocity of 1400m/s separates by a controlled explosion into two sections of mass 859kg...

Hi, I'm new to the forum and this is my first post...so go easy! I have a physics problem to solve and if possible I would love a bit of help here. This is the question: A standard car is driven around in a measured circle, increasing its speed as it goes and is able to reach 85mph before it...

Homework Statement The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 104 kg/s with an exhaust speed of 3.05 103 m/s. Find the acceleration the vehicle had just as it lifted off the launch pad on the Earth, taking the vehicle's initial mass as 3.00 106 kg...

http://nypost.com/2014/09/28/what-is-the-pentagons-secret-space-drone-doing/ Cool article. Couple of questions: Why do they need to use self-contained atmospheric protective ensemble suits around the drone? Is that yellow object the man is carrying in the first pic a Geiger counter?

I would like to calculate the above. Here are the factors. This has real life repercussions, and if further variables are required I will provide them if possible. Vehicle weight (x=4986LB) includes 120LB driver, plus 50lb child and 60lb child Pedestrian weight (p=320LB) speed of vehicle (v=?)...

Hi, I had been communicating with Chestermiller for the past many months and I modeled the exhaust gas flowing through the pipe of a car. Now, I had problems with the temperature sensor used, so this model couldn't be applied very well and its been a difficult time due to that. I have to...

Good evening, Before I start, I'm sorry if this is in the wrong forum, I wasn't sure where to post such a question. I have an car alternator which I'm going to be experimenting with to generate electricity from the wind. It's a GM Valeo model, possibly taken out of a Vauxhall. Right now...

I have project in which I have to come up with the ideas of improving the efficiency of a car (electric). For now I'm considering a hybrid electric car that has more than one power sources to run a vehicle. I came up with an idea that building solar panels on the roof of a vehicle can be one of...

I am in the design phase of a lightweight electric city vehicle with a capacity of 15kWh. I am at a stage where I am moving elements like Electric motors, tranmission, DC-DC converters, Inverters, Battery charger and battery pack in a CATIA software model. In-order to cater to the wide-range of...

Hi, I'm an engineering student in Civil/Structural engineering and am interested in structures. As well as fixed structures I am also interested in mobile structures like ships. Can I get a job designing vehicle structures after graduating from a degree focused on civil structures? Would the...

hello everyone ,i am doing my project in image processing.i am taking video of car moving on the road and taking video frames of the same. i want to calculate speed of vehicle.using frame rate i can calculate the time elapsed by vehicle to cover some distance. but i have one difficulty, As...

hello everyone ,i am doing my project in image processing.i am taking video of car moving on the road and taking video frames of the same. i want to calculate speed of vehicle.using frame rate i can calculate the time elapsed by vehicle to cover some distance. but i have one difficulty, As...

This is my requirement for one of my projects on E-bike. front wheel drive three wheeler with brushless DC geared motor. vehicle speed = 25 kmph Gross weight = 120 kg front wheel dia = 30 cm whether 250 Watts motor can able to achieve this requirement? What equations has to be used to find...

Hi all, newby here that could do with a little help. I'm doing a college project and need to work out the head wind speed in m/s that a vehicle would encounter at a various range of speeds in mph, for example a high speed train, so I can compile a graph of the data ranging from 10mph up to...

what will happen if I ground my 12v(low voltage system) and 144v(high voltage system) to a common ground?

Homework Statement A projectile is fired at a stationary vehicle. If the initial separation was 200m and the projectile traveled at a constant 75 m/s, find the acceleration the vehicle would need for a passenger to be able to reach out and calmly pull the projectile into the vehicle. (Assume...

After figuring out how to calculate Cd and Crr coefficients, I'd like to continue my "vehicle physics exploration": I'd like to determine how much it takes to go from 0 to 60 mph depending on engine power. Or does it depends on torque? By sure it also depends on air drag, which depends on...

we are designing a electric car. in that motor controller has capacitors which get charged when supply is given.so across the contactor we are attaching a precharge resistor,which prevents the hiigh inrush of current in motor controller. now we are stuck on the ques that how to discharge the...

Homework Statement Here is the data I have been given; mass = 3.4*10^6 kg (at lift off) mass of first stage propellants = 2.0*10^6 propellant consumption rate = 1.4*10^4 kg/s g = 9.8 m/s/s Find the thrust of the engines at lift-off. Homework Equations a = T-mg/m The Attempt at...

Hi guys, There's a project on hybrid vehicles, and the task is to design and simulate a hybrid vehicle: we have started on the basics, and have come up with a small layout as to how the hybrid will look like. Our main concern is whether the layout will work just with the epicyclic...

Hi, I'm working on an invention that eliminates liquid slosh in partially filled liquid containers and allows for center of gravity control. I'm wondering if there is a market for such an apparatus where elimination of all slosh is needed. I am aware of baffles, sponges, and diaphragms. A...

I’ve been doing some research and thinking recently into how vehicle emissions might be used to generate electricity in order to power the vehicle itself. I’ve seen a few products and research projects centred on this topic, although they all seem to be focused on converting the heat in the...

Hi, Car is moving at speed v. The pulse is sent inside from the back to the front. It takes time t. Another pulse is sent from the front to the back and takes same t. How should outside observer expect? Does he find that the two pulse hit sides at the same time? It sounds no. How can you apply...

Homework Statement In my homework I have to determine how do the speed (constant speed) (V) of damped mass and geometric characterictis of ground (b, h) influence on oscillation values of a model represented on a picture below. Model represents a vehicle driving on a sine wave ground. I...

Hi,dear engineer fellas. Here is my query : We are team of students who compete in international FSAE competition-that is,we are making a racing car if you will.The engine is motorcycle engine. Our team is responsible of the different circuitry . Funny stuff is,we are all mechanical engineers...

Acceleration is not Force/mass, mechanical advantage (?) I have a vehicle with wheels and electric motor that drives that wheels. Those are characteristics of engine Resultant torque and velocity at wheel will depend on radius of that wheel, as wheel work as gearing. Let's say i will try...

Hi, I'm designing a propulsion system for an electric car as a part of a college project. I'm trying to find the minimum torque needed so the car can begin to move, I'm assuming this will be the greatest torque required for motor selection, provided the vehicle will accelerate relatively...

Homework Statement The pressure in the tyres of a vehicle is 280 kPa. The contact area of each of the four tyres on the ground is 0.012m^2. Calculate the weight of the vehicle. Homework Equations Force = Pressure x Area The Attempt at a Solution 280 kPa = 2800000 Pa Force =...

Hi, What exactly are the things in vehicles that display different attributes of the vehicle called? Like for example in a car you have a display that tells you how fast you are going, the temperature of the engine etc.. I have to design one for a project. I suppose I can design a digital...

Hello everybody, I am looking for some help from Native english speakers (or otherwise extremely good speakers), for a bulletproof grammar review for a research paper. The paper is about education and automotive engineering, so context is important and so the reason I post it here. If...

Hi. I've been working on a project of angle stabilization for a vehicle moving along a string, looking like this: The propulsion system is connected to the central wheel, while the outer two wheels are used for support. I've observed that during acceleration the vehicle rotates. I...

Am designing a three wheeled cycle. The total gross weight of my vehicle including the frame + riders will be around 300Kg, which has to move at 20Kmph(5.55 m/s) speed . The basic driving force will be provided by pedaling. Assuming the least acceleration to start from rest as 0.2m/s^2, how...

Greeting. This is my first thread in engineering zone. Pleased to meet you all As the topic said. I want to ask about how possible to make animal powered vehicle for animal Or simply said, can we create bicycle for animal? I just think that, Human walk is low efficient compare to bicycle...

I notice that electric vehicle batteries (such as the one in the Tesla) are made of a bahzillion little batteries. I also notice that electric vehicle batteries seem to be absurdly expensive. A small battery is made of a case, some metals and chemicals. Can they not scale up this process...

Need some help with this question. I have given it loads of thought, but my assumptions are not getting through. Here it is: 1. Objective (a) To determine the power needed to give the chosen vehicle the required performance; to determine the bottom and intermediate gear ratios. (b)...

So I'm trying to find vehicle center of gravity, but i only have this information: full loaded vehicle weight(3200kg or 31392 N) empty vehicle weight(2000kg or 19620 N) maximum rear axle capacity(1500kg or 14715 N) maximum front axle capacity(1800kg or 17658 N) Is this possible? I have a book...

Hi, I'm not a mechanical or an automobile engineer and have a poor knowledge of vehicles as I don't drive. I'm solving a particular problem in mechanics dealing with stress analysis which deals with a trailer hitch (See attached figure) Can anyoen tell me ina very fundamental manner...

You've heard of "Snakes on a Plane", right? How about roaches on a bus?

Does the accelator of a vehicle control the amount of fuel injected in the engine or how does it control the speeding up of the vehicle? I want to know a simple way so that i make make a simple internal combustion engine.

if a saab 93 estate approx weight 1600kg is hit in the passager door head on by a toyota avensis weighing 1380kg what speed does it have to be doing to move the saab 10 feet to the side. additional weighs involved are saab plus one person 100kg toyota additional two persons approx 130kg dry...

Hello all. I am now enrolled at VRI at WWU! I am working on a sort of independent study project. I am making a V12 out of a pair of motorcycle engines to go into a VW based kit car. I have run the IHP formula and come out with 250hp, and 220 lb/ft of torque. The car weighs 1800 pounds...

Homework Statement a locomotive of mass 20 tonnes hauls a train of mass 200 tonnes up an incline of 1 in 200. the resistive force for the locomotive and the train is 40 Newtons per tonne. the train accelerates from rest to 60km/h in 2km.determine; a) the tractive force of the locomotive b) the...

I want to calculate the range of an Electric Vehicle (EV) with a Li-ion battery of 200 Wh/kg. Parameters v= 50 km/h = 14 m/s A= 0.8 m2 d = 500 m efficiency = η= 85% mc = 900 kg incl. 100 kg battery ρ = 1.3 kg/m3 First I have calculated the power of the EV with a speed of 50 km/h and...

Homework Statement A van is moving on a horizontal circular bend in the road of radius 75m. The bend is banked at arctan(1/3) to the horizontal. The maximum speed at which the van can be driven around the bend without slipping is 25m/s. Calculate the coefficient of friction between the road...

Got into a discussion today at work with a few co-workers about the physics involved in the below scenario, figured the only way for us to come to a better understanding was to ask someone with more extensive knowledge, so here goes,... A flat bed truck is moving along at 60mph, a person is...

Hi all I am doing a university module on vehicle dynamics and wish to clarify/enhance my understanding of vehicle handling and the effects of weight transfer. Here are a points based some past exam questions and my answers, if anyone can spot a mistake or would like to add anything this would...

Homework Statement the vehicle needs to stop as close to a wall that is located anywhere from 9 to 12 m away. (The distance is not given exactly) The vehicle must be self propelled and has other specifications located here...