Engine Definition and 999 Threads

I have the following question, intended for a car powered by a 4 cylinder, non turbo, gas engine. I would like to a rather conceptual answer, but anyway I will put some actual numbers. It´s said to achieve it´s max torque (200Nm) at 4000 RPM It´s max power is 150HP at 6500RPM I don´t know...

I have done a test on a 4 piston test engine which is expected to exhibit torsional resonance at 800RPM and a vertical translational resonance at 1200RPM. The data we gathered from the test bed machine was as follows: Theta | Signal 0 | -5 60 | -1 120 | 7 180...

Hi I have been plotting a Willans line, (engine power against fuel mass flow rate) and I noticed that the line is fairly linear up to about 75% and then it starts to increase a bit more dramatically. So I was wondering how does engine power at a fixed RPM effect fuel mass flow rate? Is...

I've never done this before, and undertook it for the first time today, guided by books, google, and YouTube. My truck's a 4 cylinder. I did the first test after driving it for a while to warm it up. I got 150-150-146-140 psi for the four respective cylinders 1-2-3-4. The instruction I was...

Hello Firstly i just registered, I am a final year computer science student and I am busy working on my thesis (the deadline is fast approaching) I am working this application of a rocket going into orbit and physics is not my forte. I need some help on converting the gimbal of a rocket...

Homework Statement a cars engine produces constant power therefore the cars speed will increase at a constant acceleration. is this true or false Homework Equations Power=w/t work=fd so P=mad/t The Attempt at a Solution so if p is constant it appears a must be constant...

Cleaner than electric? Mazda talks up gasoline engine fuel economy ambitions for SkyActiv 2 http://phys.org/news/2014-03-cleaner-electric-mazda-gasoline-fuel.html

If a gas engine makes 20 hp at 3000 rpm I figure the ft/lbs of torque equals about 460. Negating friction if the drive axle the engine turns goes 10 rpm with 20 hp the ft/lbs of torque equals about 10,000. I was using the formula hp x 5252 divided by rpm of shaft What I need to know...

For a ramjet engine, combustion occurs at a finite Mach number M. If we know the ambient conditions like free stream Mach number and pressure and the ratio between the stagnation temperature at the inlet and exit of the combustor, how can we derive the thrust? How can we incorporate the...

Homework Statement In 1816, Robert Stirling, a Scottish clergyman, patented the Stirling engine, which has found a wide variety of applications ever since. Fuel is burned externally to warm one of the engine’s two cylinders. A fixed quantity of inert gas moves cyclically between the...

http://imageshack.com/a/img824/2641/1cpe.png The black curve I drew there represents the load curve in 5th gear. Why is it that at 5500 rpm(160kph), I have a lesser fuel consumption(270g/kWh) than at 4000 rpm(280g/kWh)? Intuitively,if I produce more power at 180kph(ie 5500rpm),I should...

This is something pretty new, why do you think that nobody take the risk to build it, up to these days? I was looking for different concepts and saw few projects from MIT, some quasiturbine projects, some liquid piston engines, doyle engine. But let's face it - too complicated, now these videos...

Here is the real life problem I am facing: Gas reciprocating engine is situated in an engine room. The engine is primarily cooled by jacket water flowing to remote radiator. The engine surface must also be cooled by forced convection to maintain max air inlet temp of 40C. Ambient can reach as...

what is the need of adibatic process in heat engine? We can work only with isothermal process .Please expalin this.

Homework Statement A Carnot engine operates with 1 kg of methane, which we will consider an ideal gas. The ratio of specific heat capacities \gamma is 1.35. The ratio of maximum volume to minimum volume is 4 and the cycle efficiency is 25%. Find the entropy increase during the...

hey i am engineering student i am interested in designing a ic engine. I want to know necessaries and parameters for designing a engine hey please provide some reference for it thank you:smile:

In hilly areas temp is low than plain areas.So the temperature of source as well as sink must be low.But ratio remains same.So efficiency is same as in plain areas? Is my logic correct? Or anything else? Can it be more?

Hello, I'm doing a full stress analysis on a complete aircraft engine. so i was looking for documents with full specifications of the engine ( blueprints,charts,data tables, ...etc. ) . I know that most of these information are top secret whether it's a civil engine a military engine. However...

I've been wracking my brain for a simple way to implement a Sterling Engine as a water pump, rather than an engine, and using solar power as a heat source, rather than a flame. The attached diagram is the simplest implementation I could come up with: Rather than pushing/pulling a piston...

So I was having a discussion with a fellow motorcycle racer and he stated that The bike I'm riding has too much horsepower for my skill level. I currently ride a 1000cc gsxr1000. He suggested I sell the bike and get a 600cc gsxr600. Well I love my liter bike and even though he's probably right...

Homework Statement A Carnot engine operates between two finite heat reservoirs of total heat capacity CtH and CtC. a) Develop an expression relating TH to TC at any time. b) Determine an expression for the work obtained as a function of CtH ,CtC , TH and initial temperatures TH0 and TC0...

Hi all, I'm designing a 70Kw engine dyno and I'm thinking to use a friction brake with a pneumatic actuation. Which kind of brake system usually have such commercial engine dyno? Eddy current brake? Hydraulic one? Thanks

Homework Statement A haet engine works based on the difference of the temperature at the top and bottom of the ocean. The machine is solar powered and the average solar irradiance is 240W/m^2 and the temperature at the surface of the water is 25ºC. Calculate the temperature at the bottom of...

Homework Statement One end of a metal rod is in contact with a thermal reservoir at 695K, and the other end is in contact with a thermal reservoir at 113K. The rod and reservoirs make up an isolated system. 7190J are conducted from one end of the rod to the other uniformly (no change in...

Homework Statement A Carnot engine operates between a warmer reservoir at a temperature T1 and a cooler reservoir at a temperature T2. It is found that increasing the temperature of the warmer reservoir by a factor of 2.00 while keeping the same temperature for the cooler reservoir increases...

Hello PFs, (It should be eco-friendly project) I am working on ICE using hydrogen fuel. My very first step is to produce hydrogen from water that i have achieved by electrolysis.(hope to see another method as i have heard one to produce from sunlight) I am using this hydrogen and oxygen...

Homework Statement n = 5 moles, monatomic, ideal gas p1 = 7280 Pa; v1 = 2 m3 p2 = 7280; v2 = 6 p3 = 6500; v3 = 6 What is the change in heat, from 2 to 3, and from 3 to 1? Homework Equations PV = nRT U = (3/2)nRT Q = du + dw The Attempt at a Solution PV = nRT (7280)(2) =...

I am currently in the process of designing an engine dynamometer for a small engine. Maximum power of 1 KW @ 7000 RPM and a maximum torque of 1.6 Nm @ 5500 RPM. Here is my proposed method, but I have some concerns that I'll state below: Prony Brake Essentially a friction dyno, I would...

I have undertaken a course on Semiconductors. My professor told us that a sun-solar cell system can be taken as a Carnot Engine. He assumed that the surface temperature of sun is 6000k and that of solar cell is 300k.And then he found out the efficiency by (1-T1/T2), which came out close to be...

What is the standard tolerance for a cylinder bore and piston? The working fluid is steam or compressed air.

Im building a turbine engine and I am having trouble figuring out the hole sizes for the burner can, my problem is that I am not using a compressor section but rather using an air compressor for the air intake so I can't use the standard formula, can I? If I know my blad diameter and the flow...

Okay, I am considering a cycle, where the working fluid is an ideal gas, with heat capacities Cv and Cp, the cycle consists of: isochoric increase in volume, adiabatic expansion back to initial pressure and a isobaric compression back to initial conditions. Questions: - q1) I am asked to...

Here's what I need, and this might sound far-fetched, but please answer it to the best of your ability. I want to create a car engine in blender, and then add a physics engine to make it run. The thing is, I don't want to animate it, I want to apply python script that can actually make the...

Here are the links http://books.google.ca/books?id=RN4_jLbVO3YC&pg=PA50&dq=Stirling+auto+engine+a+lot+of+progress,+but+Spirit&redir_esc=y#v=onepage&q&f=true http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19880002196_1988002196.pdf I have read both but I don't understand how the gas...

Hello everybody, I am working on the whole vehicle calculations, engine, brakes, suspension and engine simulation, using that software, take a look: http://www.speed-wiz.com/calculations/engine-simulation/engine-simulation-conditions.htm That software, you input the values at the top...

I was wondering how the force of a Stirling engine was measured? I mean, for every degree Celsius that the temperatures differ. how much more force (or horse power) is the engine generating? Are there any other variables to this? What I'm getting is can Stirling engines power cars if enough heat...

A Carnot engine is operating between a source and a sink at temperatures T1 & T2 (T1>T2) respectively.. The heat capacities of the source and the sink are equal. Find the final temperature attained.

Hello, so I am building a small turbine engine and i need to know the best angle for the blades. Any help would be very helpful, thank you.

Dears, please help me: How to Calculate the Required Force to Push the Car Engine Piston Down if I Want to Rotate my shaft in 1500rpm, My Piston Dia Is 50mm, Piston Hight Is 100mm, Piston Mass Is 1kg, My Engine Is 4cylender and 4stroke? regards ibrahim

Homework Statement combustion adds 1200kj/kg to the charge. what is the meaning of " charge" here. Homework Equations The Attempt at a Solution

I need sources such as web sites, books, or videos aiming engine thermodynamics subject such as otto cycle,diesel cycle, seilinger cycle(combination of diesel and otto), performance, combustion process. Can you make give some advice.

Hi, I am trying to figure out heat engines. I don't understand why heat from a hot reservoir MUST exhaust heat into a cold reservoir. How does that satisfy the second law of thermodynamics? Why can't all energy from the hot reservoir be used to do work? Thanks

I always wonder how BMW engines of smaller size are powerful than other OEM's engines despite other OEMs haveing engine of larger size. To be very clear i have following questions.. 1. Doesnt size of engine affects the power of the engine? 2. What influences the power of engine...? Bore...

hello friends,can you explain what is correct clearance of engine's moving parts,giving examples.

Homework Statement hello friends,i have to do a project about calculations of cooling of a car engine.i don't know what to do or where will i start.can you offer me some links or books about this area please.how can i find how many wats of heat, say, a 100 kw engine, releases. Homework...

I'm fed up with google. It returns results that don't have all my keywords in it. Just now I searched for "Skyrim Playonlinux" and it returned several top results involving Skyrim Wine (wine as in drink, in the game), since Wine is related to playonlinux. What is a good search engine that...

Hello This is a concept I have been researching for a while. A company called LIM Technology has made a few working prototypes of this very concept they call a simple cycle engine; they have a patent for the intake valve technology. Here is their website...

Homework Statement A two-stroke internal combustion engine can be modeled by the following cycle. The cycle starts with the piston chamber at maximum volume V1 = 1000 cm3, filled with an air-fuel mixture – which we treat as an ideal gas – at atmospheric pressure and room temperature (p1 =...

Homework Statement An automobile has a 2.5-litre, four-cylinder, homogeneously charged, direct injected, four-stroke diesel engine. The maximum power output of this naturally aspirated engine is 200 HP at 4000 rpm. By turbocharging, the intake pressure is boosted twice as that for the naturally...

Have a new task, would appreciate some pointers. Conducting a heat transfer analysis on a tank with water coming in and out that's to serve as a hot side for a displacing stirling engine. If the inlet q dot into the tank is 1000W. Observing there will be losses due to conduction and...