battyr Posted August 4, 2009 Share Posted August 4, 2009 The claim improved efficiency and major reductions in emissions. http://www.greencarcongress.com/2009/08/sc...l-20090804.html http://www.tscombustion.com/ Wizard. Can you comment on what they are doing. I don't fully understand it, but it sounds like they get rid of NOx with EGR. They improve efficiency and reduce PM with heat and pressure. Do you think this can fix diesel emissions in a cheap way? Quote Link to comment Share on other sites More sharing options...
battyr Posted August 4, 2009 Author Share Posted August 4, 2009 I wonder if this technology can be used to improve gasoline efficiency? Quote Link to comment Share on other sites More sharing options...
jpd80 Posted August 4, 2009 Share Posted August 4, 2009 Hint: Supercritical fuel makes a liquid act more like a gas when it's injected. Quote Link to comment Share on other sites More sharing options...
battyr Posted August 5, 2009 Author Share Posted August 5, 2009 Hint:Supercritical fuel makes a liquid act more like a gas when it's injected. It makes the engine explode? Quote Link to comment Share on other sites More sharing options...
jpd80 Posted August 5, 2009 Share Posted August 5, 2009 It makes the engine explode? NO. The liquid exists with no surface tension making for better fuel mixing with extremely small particle size. It's the next step beyond Piezo Injection. Quote Link to comment Share on other sites More sharing options...
battyr Posted August 5, 2009 Author Share Posted August 5, 2009 NO. The liquid exists with no surface tension making for better fuel mixing with extremely small particle size. It's the next step beyond Piezo Injection. That reduces PM. And allow leaner operation. Less energy is wasted keeping the PM filter clean. I don't see any big gains in fuel efficiency. I don't see why NOx doesn't get worse. Quote Link to comment Share on other sites More sharing options...
jpd80 Posted August 5, 2009 Share Posted August 5, 2009 (edited) That reduces PM. And allow leaner operation. Less energy is wasted keeping the PM filter clean. I don't see any big gains in fuel efficiency. I don't see why NOx doesn't get worse. The idea has been around since the 1940s but the technology and the need for it to be developed was never seen as cost effective. Holding diesel fuel between 300-450C at 100 bar and mixing it with exhaust prior to injection is difficult enough these days. It may be a way past NOX for US diesels but I doubt that it's anywhere near production ready. Edited August 5, 2009 by jpd80 Quote Link to comment Share on other sites More sharing options...
battyr Posted August 5, 2009 Author Share Posted August 5, 2009 The idea has been around since the 1940s but the technology and the need for it to be developedwas never seen as cost effective. Holding diesel fuel between 300-450C at 100 bar and mixing it with exhaust prior to injection is difficult enough these days. It may be a way past NOX for US diesels but I doubt that it's anywhere near production ready. I see. Quote Link to comment Share on other sites More sharing options...
mustang316 Posted August 9, 2009 Share Posted August 9, 2009 I see. My guess is that it will allow "control" of volumetric HCCI type combustion. However it will still have the high load problems already seen by these combustion regimes. Also I want to know how they plan on heating the fuel to that extent at cold start. Pretty interesting stuff Quote Link to comment Share on other sites More sharing options...
jpd80 Posted August 10, 2009 Share Posted August 10, 2009 (edited) I don't believe they need supercritical fuel at cold start idle, so perhaps it's merely traditional glow plugs and once exhaust is around/through fuel, she is away.... Edited August 10, 2009 by jpd80 Quote Link to comment Share on other sites More sharing options...
mikeputc Posted September 9, 2009 Share Posted September 9, 2009 (edited) Interesting timing. Gale Banks was talking about supercritical injection this afternoon here in Los Angeles. My understanding is that the fuel enters the cylinder like jpd80 describes *however* you pay for the lower viscosity with a fuel that now has less lubricity to help keep the engine working well. Sounds cool though. Edited September 9, 2009 by mikeputc Quote Link to comment Share on other sites More sharing options...
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