I am again by no means chemist. I only understand the engine and combustion process from fundamental principles. I want to know why we are no where of getting the inherent energy of the gasoline.
Again these are still mistakes in my statements. But I am absolutely convinced Chen engine's efficiency gain.
The word "Chen" you will not find in German dictionary or translator. As in all German, two words combined to form a new word. "Chen" is used at the end to mean little. Maedchen. little girl, Liebchen, little darling, etc.
In my last posting EPA should be DOE.
In this post I would like to describe experimental evidence that I personally had. In the 70s, every car in California must have anti-pollution(smog) device, commonly known as EGR. In Los Angeles basin the pollution was so bad, the air was always brownish. People felt it in their eyes, throats etc. The culprit is NOx(among others). There were no three way catalytic converter then, so NOx can not be neutralized. The only solution is to "introduce exhaust air into intake manifold" to flood cylinders with exhaust gas. The reason is that NOx is formed only at high combustion temperature(Note: more efficient combustion). If we artificially lower the combustion temperature, then we do not have NOx pollution. Efficiency also would suffer, but gas was Cheap then.
As we were student then, we had to tune our own car. I remember one instance when a group of us tuned a car. We first disconnected all Smog devices and got the engine to run smoothly at idle. Then we connected EGA and start the engine again. Guess what the engine stumbled badly. We had to re-adjust air and fuel to much higher level to keep engine running.
Some of my not so law-abiding friends told me, with EGA devices disconnected, they have better gas milage and greater power.
I bring this data up to support my "Exhaust gas is bad for your engine"
Chengine wrote:
I bring this data up to support my "Exhaust gas is bad for your engine"
Chengine
Anecdote != data.
I've started making several posts to points you've made, but I've always given up as there is no logical progression to the points you make. Your posts are filled with assumption, supposition, deduction and elaboration. When you actually boil it down, your posts contain almost no technical content. It's all waffle.
A good idea can be pitched (outlined) and make sense in a paragraph at most. You now have 43 posts (at I would conservatively estimate an average of 250 words per post). That is over 10 thousand words in this thread alone.
You really should try to be more concise with expressing your ideas.
Chengine wrote:I do want everybody's explanation on why an engine performs better, both in efficiency and power in winter.
You've asked this a couple of times now. And I think it's important for us to know your thinking behind why it's the case.
So. In as few a words as possible.
Why do you think a car makes more power in winter.
Today is thermaldynamic day. As Chen engine is also a heat machine, we must have a closed loop in PV plot and this closed area better be larger than the one that I replace.
Before I start if you are already conviced that my explanation that CO2 and H2O' will rob combustion energy and thus by eliminating them will improve engine efficiency, you should skip this post, as I shall go into nauseating details that does not really add to any insight. Here we go.
For any thermaldynamic system where we build and use, we put in energy in the form of heat and extract work out of this machine. This is typical for steam engine.. But our beloved Otto cycle is also a heat engine and we also have a closed loop to extract energy.
This loop for simplicity is sort of four sided polygon, It is represented by Right, Left, top and bottom. Although the top and bottom side are curved. I'll give it the following
A right handside begin point. it s pressure is one atmoshere (assuming peak power situation) and is a vertical line, I'll come back to it. Volume axis is at 10.
B bottom curve sloping from 1 atm pressure toward 10 atm pressure toward left side and stops at volume of 1. This line represents the work done onto the engine cylinder. (compression cycle)
C. This is a vertical line from the end of line B 10 ATM to say 150 atm pressure at V=1, this represents the combustion heat input. this represents instaneous heat input. This energy raise temperature and pressure.
D, this top curve is the expansion of the gas that pushes piston down, it is usually a V P= constant curve and it ends when the volume reaches 10. This curve represents the work extracted from the machine. The right hand end point is usually above atm. maybe 3 atm. (expansion cycle)
E. The end point of curve D is also the top point of side E. The pressure drops down to one atm, this represent the exhaust cycle. This is also the same as A. This curve represents heat rejected by the heat engine.
The total area enclosed by the loop in PV diagram is called the work done. When it is divided by the energy input, it is called efficiency.
OK. the above is ideal Otto cycle, now let use see what happens when exhaust gas is in the mix. As we explained in previous
two postings, CO2 and H2O of the exhaust "suck" up the combustion energy to become their internal energy, vibrations and rotations, thus the pressure increase, instead of going to 150 ATM, we just reach 135 atm. Now we have a modified curve D'.
This new curve also follows PV= constant" trajectory and intercept vertical line at vertical line at V=10.
The loop area represented by combustion cycle with waste gas is thus about 10% smaller than the ideal loop.
And, this is the thermadynamic efficiency loss of current Otto engine with exhaust gas.
Regards,
Chengine
If I do not receive reply post(s), then I can assume that every one understands Chen engine fundamentals. If not I'll stay on this point as long as needed. All numbers are hypothetical to illustrate the principle.
At the very least you have ignored the work done on the compressed air for the scavenging, and you have not justified moving from 150 to 135 atm peak cylinder pressure.
First off. I'm not usually psychotic about grammar/spelling in posts as long as the gist is clear, but in this case I'll have to make an exception.
Today is thermaldynamic day.
For any thermaldynamic system where we build and use,
THERMODYNAMICS.
It's like consulting someone who claims to be a neurosurgeon but keeps referring to 'brians'. He can be the smartest man in the world, but such a fundamental --- up does not inspire confidence.
EGR typically isn't used at idle or full load.
As you don't want lots of power at part load, replacing oxygen with exhaust gas seems like a jolly good idea. Allows a full cylinder, you don't have to burn as much fuel to remain at stoichiometric.
As I said we have to agree on the fundamental principle. If I am already in trouble with the fundamental, there is not much point going on right? I'll wait for a couple of days before I go to the next step. That is energy input. I am waiting for the PV guy. Hope he is satisfied. A new engine concept without a valid PV diagram is BS. I agree. I ignored real exhaust cycle and input cycle. as they just move along the base(1 ATM) line back and forth, neither gain or lose work.
By the way, why hasn't any one attacked the green engine part of it. It is very important to me. The engine is worth it even if it does not gain any efficiency. Do not worry, it does.
As you know that Catalytic converter must reach 400C to be fully functional. Thus, the first five minutes of driving, you pollute air. If you reach your office and then park for 4 hours, then when you drive to lunch you emit for 5 minutes more. Since your lunch may be short so the cat is still warm, and you only pollute for 3 minutes. And finally when you go home then that is another five minutes. Thus, perhaps half of the time you are on the road, you pollute.
On the other hand Chen engine is inherently clean. There is no warm up time needed. And you do not even need Two way converter at all, just like Diesel. All the CO and HC are oxidized in the cylinder.
Even Hybrid car emits more pollutants than equivalent Chen engine based car.
Bottom line, conventional car is not green, Chen engine based car is only next to all electric car in cleaniness. It needs just NOx converter. If NOx is neutralized by Urea spray, then it is 100% clean.
According to latest DoE report. http://www.fueleconomy.gov/feg/coldweather.shtml, winter driving has lower MPG. It is not what I observed for my own car, nor report I read elsewhere. Due to conflicting information, I shall skip this question. I apologize for posing this question also.
According to latest DoE report. http://www.fueleconomy.gov/feg/coldweather.shtml, winter driving has lower MPG. It is not what I observed for my own car, nor report I read elsewhere. Due to conflicting information, I shall skip this question. I apologize for posing this question also.
Chengine
No. Lets not skip it. That's not how engineering or science works. A question is tricky so we sweep it under the carpet.
Also fuel economy is not the same as efficiency.
You made a statement, albeit in the form of a question. You should be able to back up the reasons for making that claim.
The correct answer at the moment for me is that I do not really want to split the discussion. I need to focus on Chen engine.
I think that I have just sealed the most fundamental questions of Chen engine.
1. Why removing waste gas will improve efficiency?
2. What is the physics behind your claim of efficiency?
3. What is your PV chart? Where does it show efficiency gain?
These are the most important questions I answered. Coming from 100% disbelieve, you must give me credit for answering these fundamental questions. What I need to do is to actually calculate the gain and calculate the power needed to run air compressor. These are really engineering details. Any competent engineer should be able to work it out. But I'll will work out examples in future postings.
Chengine wrote:The correct answer at the moment for me is that I do not really want to split the discussion. I need to focus on Chen engine.
I think that I have just sealed the most fundamental questions of Chen engine.
1. Why removing waste gas will improve efficiency?
2. What is the physics behind your claim of efficiency?
3. What is your PV chart? Where does it show efficiency gain?
These are the most important questions I answered. Coming from 100% disbelieve, you must give me credit for answering these fundamental questions. What I need to do is to actually calculate the gain and calculate the power needed to run air compressor. These are really engineering details. Any competent engineer should be able to work it out. But I'll will work out examples in future postings.
Chengine
you have had seven pages to answer those questions........
