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8143 messages, Last post on Nov 27, 2009 at 12:10 PM
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| RUG down to $1.999 with Diesel at $3.109. Price spread as a percentage currently rules out the Jetta CleanDiesel as a viable alternative for a replacement to our aging Accord. | |
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Replying to: roland3 (Nov 22, 2008 6:26 am)  "fuel claims polarise opinion" in Google News you will see some controversial fuel droplet research conducted by Professor Tao of Temple University. This is quite a bit related to the theory behind Green Diesel Corp's new injector; however one relying on a mechanical means and one system using an electronic method to achieve the same goal, more complete fuel combustion. I think there should be some regulation induced incentive for these very sophisticated Diesels in that for reduced carbon and soot output there might be a Diesel only reduction (not to apply for gasoline engines) in the NOx regs that are strangling the industry.
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Replying to: roland3 (Nov 27, 2008 2:10 am) In the newer diesels, piezo-electric injectors are becoming more mainstream. They can inject seven plus injections quickly to cool the air charge and produce a very clean burn. As for particulate, there are self-regenerating particulate exhaust filters and appropriate catalysts and urea spray systems to reduce NOx. Does anyone in the forum know how effectively the urea injection system reduces NOx?
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Replying to: winter2 (Nov 28, 2008 7:44 pm) link title link title
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Replying to: winter2 (Nov 28, 2008 7:44 pm) .. ... The urea after-treatment systems are very effective on reducing NOx; however it is my opinion that the entire infrastructure will have to work, almost without problems, for two years, after implementation, just to cover, the carbon footprint, from building, the hundreds of millions of dollars, infrastructure, where upon, I expect the whole system to be obsolete. At least, it does not appear to be outright poisonous, as the MTBE debacle was. The reduced carbon output is a trade off in that urea treated engines are more efficient, because they can be tuned and built to a higher state and make more heat. Of course, that is if you ignore the three percent liquid penalty of the urea, and what it took, to get it, in your car.
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Replying to: roland3 (Nov 28, 2008 8:46 pm) http://www.greencarcongress.com/2008/09/delphi-launches.html Here is another. http://www.springerlink.com/content/h5g70142565u5131/ Here is yet a third showing up to seven injections/cycle http://www.theengineer.co.uk/Articles/268707/Perfect+piezo.htm
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Replying to: ruking1 (Nov 28, 2008 7:54 pm) On the British version of our EPA website, a brief search shows no diesel using AdBlue or equivalent. Many do have DPF though.
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Replying to: winter2 (Nov 29, 2008 5:42 pm)
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Replying to: winter2 (Nov 29, 2008 5:32 pm) .. ... What I find even more surprising (and hopefully true) is that one system claims a significant drop in NOx production, especially considering that most attempts at more complete combustion increase NOx. Read, more compression, more boost, more heat, sharper timing. It is one of Mother Nature's CRUEL ironies.
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Replying to: gagrice (Nov 29, 2008 8:03 pm)
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