Klaus
06-19-2006, 04:09 PM
GM revamping Duramax diesel for new standards
Posted Jun 19th 2006 8:01AM by John Neff (http://www.autoblog.com/bloggers/john-neff)
Filed under: Trucks/Pickups (http://www.autoblog.com/category/trucks/), Green (http://www.autoblog.com/category/green/), Chevrolet (http://www.autoblog.com/category/chevrolet/), GM (http://www.autoblog.com/category/gm/), GMC (http://www.autoblog.com/category/gmc/)
http://www.autoblog.com/media/2006/06/hdsilverado.jpg (http://www.autoweek.com/apps/pbcs.dll/article?AID=/20060616/FREE/60614007/1041/rss01&rssfeed=rss01)
General Motors has decided to go ahead with plans to rework its 6.6L Duramax diesel V8 engine in anticipation of the new Tier 2 Bin 5 emissions standards that will take effect on January 1st. The new standards call for a 90-percent reduction of oxides of nitrogen and particulate matter. Though the changes won't interrupt production of the Chevy Silverado and GMC Sierra heavy-duty pickups in which the engines are used, they will sharply increase the cost of building the engines. GM Powertrain expects to meet the standards by using a new variable geometry turbo, enhancing the engine's exhaust gas recirculation and using a closed crankcase ventilation system. The exhaust system will also be supplemented with an oxidizing catalytic converter and particulate filter like those first introduced on many European diesels a couple of years ago.
You may remember Ford's plans to meet the new standards (http://www.autoblog.com/2006/06/13/new-ford-powerstroke-said-to-be-using-piezo-injectors/), which include using expensive piezo injectors on its new 6.4L twin-turbo Powerstroke diesel. Dodge has not revealed yet how it plans to get the Ram's Cummins diesel up to snuff by January 1st.
Posted Jun 19th 2006 8:01AM by John Neff (http://www.autoblog.com/bloggers/john-neff)
Filed under: Trucks/Pickups (http://www.autoblog.com/category/trucks/), Green (http://www.autoblog.com/category/green/), Chevrolet (http://www.autoblog.com/category/chevrolet/), GM (http://www.autoblog.com/category/gm/), GMC (http://www.autoblog.com/category/gmc/)
http://www.autoblog.com/media/2006/06/hdsilverado.jpg (http://www.autoweek.com/apps/pbcs.dll/article?AID=/20060616/FREE/60614007/1041/rss01&rssfeed=rss01)
General Motors has decided to go ahead with plans to rework its 6.6L Duramax diesel V8 engine in anticipation of the new Tier 2 Bin 5 emissions standards that will take effect on January 1st. The new standards call for a 90-percent reduction of oxides of nitrogen and particulate matter. Though the changes won't interrupt production of the Chevy Silverado and GMC Sierra heavy-duty pickups in which the engines are used, they will sharply increase the cost of building the engines. GM Powertrain expects to meet the standards by using a new variable geometry turbo, enhancing the engine's exhaust gas recirculation and using a closed crankcase ventilation system. The exhaust system will also be supplemented with an oxidizing catalytic converter and particulate filter like those first introduced on many European diesels a couple of years ago.
You may remember Ford's plans to meet the new standards (http://www.autoblog.com/2006/06/13/new-ford-powerstroke-said-to-be-using-piezo-injectors/), which include using expensive piezo injectors on its new 6.4L twin-turbo Powerstroke diesel. Dodge has not revealed yet how it plans to get the Ram's Cummins diesel up to snuff by January 1st.