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#41
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Easy is not a factor. All things worth doing require effort. What is
"cannot"? Rich S. Very good argument. |
#42
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"MJC" skrev i meddelandet ... Snip 1. Desiel injection timing is differant than on an Otto engine. The fuel is injected during the intake cycle on the Otto engine and the fuel is injected during the ignition cycle on the Desiel. On the Desiel the fuel injection cycle starts just before TDC and ends well after TDC. The fuel ignites as soon as it hits the hot air. etc., etc. --- SNIP --- It's Diesel, not "Desiel". -- Andrew P. Well if you're going to get picky, it's "Auto" engine, not "Otto" engine. MJC It is NOT auto engine it IS Otto engine, dont belive? Google for Otto engine and see for yourself. And pardon me for bad spelling I am not fluent in your language. |
#43
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"Morgans" skrev i meddelandet ... True, but _everyone_ can take the time to re-read their post, and everyone can learn basic rules, like their-there, to-too-two. By not doing that, people that can't spell _do_ look like morons. They should run spell check if'in they know they have a speeling problem, also. -- Jim in NC So I am a moron if my spelling isnt correct? Bet I know more about your language (english) than you know of mine (swedish), and I will not call you any bad names if you are not correct when trying to use mine. With bad or good spelling. Have a nice day Owe R |
#44
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"ower" wrote Bet I know more about your language (english) than you know of mine (swedish), Well, I have to give you a break, considering you are a non English speaker. I (and others) should have caught that fact. Do as well as you can, and re-read your posts, and all is forgiven. g -- Jim in NC |
#45
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Steve wrote:
I pretty much agree, although today's high-speed diesels are doing a lot better at approchin the constant-enthalpy cycle than they used to, thanks to being able to divorce the injection profile from crankshaft position via electronically-controlled injection systems. Before I retired there was a group at work doing applications research on micromachining. One of the things they were looking at was fuel injector controls (one for each injector). They would have had a VERY high frequency response. We knew others were working on this (Ohio State was one, I believe). I have heard of nothing on this since I retired in '00, and have lost contact with the group that was doing it. Anyone aware of current work on this? At the time it was aimed at SI engines, but I don't see anything that would prevent it being used on Diesels. |
#46
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Sport Pilot wrote:
The Diesel is not an Otto cycle it is a completly differant cycle. The Diesel is a constant pressure cycle where the presure is constant through the expansion phase. I wouldn't say the ENTIRE expansion phase. That would not be that great for efficiency- sort of like a steam engine running with no cutoff. And if one injects fuel into the cylinder at the instant just before BDC, that fuel would be pretty much wasted. I was under the impression that the cycle would look something like the steam (Rankine) cycle in that the way Diesel envisoned it it would be either constant enthalpy or constant pressure of part of the expansion phase, adiabatic during the rest. The point where it changed would correspond to what would be the throttle opening on a steam or SI engine. At full "throttle" the changeover would be late in stroke, light load early in stroke. |
#47
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Sport Pilot wrote:
You can only get so much speed when you inject the fuel through the combustion or expansion cycle. High speed diesels get more speed by injecting more of the fuel early. But an aircraft engine doesn't need to turn more than 2500 RPM so we should be able to get the benifit of the longer burn time. True, but even 2500 rpm is a high speed Diesel. When we speak of low speed Diesels, those are like the big ship and stationary engines that run maybe 800 rpm max. |
#48
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"LCT Paintball" wrote in message
news:BIehe.79335$WI3.31550@attbi_s71... Easy is not a factor. All things worth doing require effort. What is "cannot"? Rich S. Very good argument. Thanks. Age is a mitigating factor, though. I will no longer play poker for real money. :-= Rich S. |
#49
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LCT Paintball wrote: Easy is not a factor. All things worth doing require effort. What is "cannot"? Rich S. Very good argument. Only thing is that many things don't have to be perfect. |
#50
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Morgans wrote: "LCT Paintball" wrote For the record, I disagree with you. I cannot spell, but I'm no idiot. Some people are good at math, others are athletic, and others can spell. Just because it's easy for you doesn't mean it is for others. True, but _everyone_ can take the time to re-read their post, and everyone can learn basic rules, like their-there, to-too-two. By not doing that, people that can't spell _do_ look like morons. They should run spell check if'in they know they have a speeling problem, also. -- Jim in NC HELLO! It's just the friggin usenet! Most of us don't even know who we are talking too. Some of us have more important things to do, such as correspondance on a 10 million dollor project. You bet that baby gets proofread, spell checked, grammer checked, proofread, maybe ask a co worker to proofread it, see what I missed, etc. |
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