| General Motors Corp. has announced that it | | | | meeting the toughest emissions requirements |
| will introduce a new, state-of-the-art 4.5L | | | | in North America, it also delivers an |
| V-8 Duramax turbo-diesel that improves engine | | | | effortless performance feel because of its |
| fuel efficiency by 25 percent, reduces CO2 | | | | high torque across the speed range," said |
| emissions by 13 percent and cuts particulates | | | | Charlie Freese, executive director of GM |
| and NOx emissions by at least 90 percent for | | | | Powertrain Diesel Engineering. "It is also |
| North American light duty trucks and the | | | | significantly quieter than other diesels on |
| HUMMER H2 built after 2009. | | | | the road today, with noise and vibration |
| | | | performance approaching gasoline V-8 levels." |
| News reports are saying that the premium V-8 | | | | |
| diesel is set to deliver class-leading | | | | Technical highlights of the engine include |
| torque, power and refinement while at the | | | | aluminum cylinder heads with integrated |
| same time maintaining a significant fuel | | | | manifolding; a variable-vane turbocharger |
| efficiency advantage over comparable-output | | | | with intercooling; a Compacted Graphite Iron |
| gasoline engines. | | | | (CGI) block for a stronger and lighter engine |
| | | | base (compared to lower-strength aluminum or |
| "This new GM light duty diesel is expected to | | | | heavier grey cast iron); and fracture-split |
| become a favorite among customers who require | | | | main bearing caps and connecting rods for a |
| excellent towing ability and fuel | | | | precise fit. An electronically controlled, |
| efficiency," said Tom Stephens, group vice | | | | ultra-high-pressure, common-rail fuel system |
| president, GM Global Powertrain and Quality. | | | | is used, which has the ability to inject fuel |
| "It will meet the stringent 2010 emissions | | | | five times per combustion event to control |
| standards, and it will be compliant in all 50 | | | | noise and emissions. |
| states, making it one of the cleanest diesel | | | | |
| vehicles ever produced." | | | | Already anticipating future market demand, |
| | | | the new V-8's compact size enables it to fit |
| The new dual-overhead cam, four-valve V-8 | | | | in the envelope of a gasoline small-block |
| diesel engine will fit within the same space | | | | engine, providing GM the flexibility to |
| of a small-block V-8 gasoline engine. This | | | | introduce this engine in a wide variety of |
| compact size is made possible by using | | | | vehicle applications. |
| integral cylinder head exhaust manifolds, | | | | |
| integral cam cover intake manifolds and a | | | | The premium V-8 diesel engine is expected to |
| narrow block. | | | | deliver class-leading refinement, horsepower |
| | | | and torque and fulfill multiple vehicle |
| At this age and time, fuel efficiency is a | | | | applications with ratings in excess of 310 |
| big consideration for consumers. GM addresses | | | | horsepower and 520 lb-ft of torque. |
| this by offering environmental benefits from | | | | |
| the new engine that include a 13-percent | | | | There are 17 diesel engine variants in 45 |
| reduction in CO2 versus gasoline engines, and | | | | vehicle lines around the world that GM (Opel, |
| at least a 90-percent reduction in | | | | Saab, Vauxhall and GMDAT) currently offers. |
| particulates and NOx compared to diesel | | | | GM - which also makes top of the line GMC |
| vehicles today. This will be the automaker's | | | | wheels - sells more than one million diesel |
| first engine to use a selective catalytic | | | | engines annually, with products that offer a |
| reduction NOx aftertreatment system with a | | | | range of choices from the 1.3L four-cylinder |
| diesel particulate filter to help achieve the | | | | diesel engine sold in the Opel Agila and |
| Tier 2 Bin 5 and LEV 2 emissions standards. | | | | Corsa, up to the 6.6L V-8 Duramax diesel sold |
| | | | in full-size vans, heavy duty pickups and |
| "This new V-8 is not only a clean diesel | | | | medium duty trucks in the U.S. |