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From: atec7 7 ""atec77 " on 8 Apr 2010 10:05 http://www.abc.net.au/tv/newinventors/txt/s2865950.htm
From: Bernd Felsche on 8 Apr 2010 11:48 atec7 7 <""atec77 \"@ hotmail.com"> wrote: >http://www.abc.net.au/tv/newinventors/txt/s2865950.htm Ummm... it's a differential built "sideways". Nice try. The "20%" improvement in fuel consumption would be best case. Wishful thinking, to a large part. Many modern engines effectively have variable displacement; with mechanical and turbo-superchaging varying the amount of air that an engine gets, which extends flexibility and the load-speed range at which efficiency is at or near peak. Diesel engines don't have a sharp peak efficiency characteristic. Digression Back in the 1930's, the Germans were flying with 2-stroke diesel engines having a brake thermal efficiency of over 40%. (Jumo 205) The brake-specific fuel consumption curve of the engines is quite flat over a wide range of speeds, varying by about 5% between about 1600 and 2000 rpm (max speed 2200 rpm) with a minimum around 230 g/kWh for the ones with only a scavenge blower; down to 220 g/kWh for the Jumo 207 with additional exhaust-gas turbocharger, designed for flying at altitudes in excess of 16km (52,000ft). Spark-ignition engines are sprouting direct-injection as well, so diesel-like efficiency can at least be approached under part-load conditions; which is where most driving occurs. Similar emissions problems to those of diesel, in the form of NOx are a big problem. Solutions are similar; such a cooled EGR to reduce the effective volume of fresh air reducing combustion temperatures and employing a storage 'catalyst' that will be purged opportunistically when e.g. moderate to hard acceleration is called for, or by rich-cycling with retarded timing, deliberately producing excess HC and CO to purge the NOx, without changing the torque at the flywheel. -- /"\ Bernd Felsche - Innovative Reckoning, Perth, Western Australia \ / ASCII ribbon campaign | If builders built buildings the way programmers X against HTML mail | wrote programs, then the first woodpecker that / \ and postings | came along would destroy civilization.
From: atec7 7 ""atec77 " on 8 Apr 2010 23:49 Bernd Felsche wrote: > atec7 7 <""atec77 \"@ hotmail.com"> wrote: > >> http://www.abc.net.au/tv/newinventors/txt/s2865950.htm > > Ummm... it's a differential built "sideways". Not the way he explained it or according to the engineers on the show no clutch no bands might be worth pursuing certainly a better solution than lots of bands > Nice try. > > The "20%" improvement in fuel consumption would be best case. > Wishful thinking, to a large part. >
From: Albm&ctd on 9 Apr 2010 01:27 In article <hpknqt$70d$1(a)news.eternal-september.org>, atec7 7 <""atec77 \"@ hotmail.com"> says... > http://www.abc.net.au/tv/newinventors/txt/s2865950.htm > How boring. Al -- I don't take sides. It's more fun to insult everyone. http://kwakakid.cjb.net/insult.html
From: atec7 7 ""atec77 " on 9 Apr 2010 01:51
Albm&ctd wrote: > In article <hpknqt$70d$1(a)news.eternal-september.org>, atec7 7 <""atec77 \"@ > hotmail.com"> says... >> http://www.abc.net.au/tv/newinventors/txt/s2865950.htm >> > How boring. > > Al Projecting again you surfie reject ? |