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