enkeiavalanche
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Although it is not scheduled to hit U.S. shores yet, GM recently unveiled its all-new 2.9-liter V6 turbo-diesel that will first appear in the 2009 Cadillac CTS-equipped model sold primarily in Europe. With European automakers starting to bring more diesel-equipped vehicles to the U.S. in the near future, it is possible to see GM doing the same with its upcoming diesel Cadillac CTS. Since CTS already has a presence in the specialty-equipment industry?urban- and motorsports-inspired custom versions were among the four that were present at the 2006 SEMA Show?a stateside diesel version could help to boost this presence. In the near future, however, the European market will get another diesel car, and the U.S. will just have to eagerly wait for.
Taking a look at what GM has added to its new family of diesel engines, the compact dual overhead cam, four-valve V6 diesel engine features an innovative closed-loop combustion control system designed to meet future emissions standards. This 250 horsepower engine can be installed in a longitudinal or transverse layout and can be adapted to a wide range of two- or four-wheel-drive vehicles.
Key enablers for GM?s combustion control system are high-speed piezo-resistive cylinder pressure sensors that are integrated within the engine glow-plugs. These specialized sensors acquire real-time data from the combustion process, enabling instantaneous fine-tuning of the fuel-injection process. In the future, this clean combustion control technology will be introduced in other GM powertrains for its diesel engines.
The high-pressure, common-rail system that provides fuel during the combustion process provides up to 2,000 bar (29,000 psi) injection pressure. The injectors are quick-firing piezo-electrically actuated, allowing up to eight injections per engine cycle. The after-treatment system includes an oxidation catalyst and a particulate filter that are close-coupled to the engine to achieve future emissions standards.
An electronically-controlled variable geometry turbocharger generates boost pressure within the engine. The engine has torque of 406 lbs-ft beginning at 2,000 rpm, while providing effective fuel economy and reduced emissions.
The new, compact V6 powerhouse features aluminum cylinder heads and a 60-degree bank angle, 83.0mm bore and 90.4mm stroke, which results in displacement of 2,935 cubic centimeters. The engine block is made of stronger and lighter Compacted Graphite Iron (as compared to lower- strength aluminum or heavier gray cast iron) to optimize engine packaging, weight, refinement and performance.
GM expects that half of its Cadillac CTS sales in Europe will have the all-new diesel engine.
Taking a look at what GM has added to its new family of diesel engines, the compact dual overhead cam, four-valve V6 diesel engine features an innovative closed-loop combustion control system designed to meet future emissions standards. This 250 horsepower engine can be installed in a longitudinal or transverse layout and can be adapted to a wide range of two- or four-wheel-drive vehicles.
Key enablers for GM?s combustion control system are high-speed piezo-resistive cylinder pressure sensors that are integrated within the engine glow-plugs. These specialized sensors acquire real-time data from the combustion process, enabling instantaneous fine-tuning of the fuel-injection process. In the future, this clean combustion control technology will be introduced in other GM powertrains for its diesel engines.
The high-pressure, common-rail system that provides fuel during the combustion process provides up to 2,000 bar (29,000 psi) injection pressure. The injectors are quick-firing piezo-electrically actuated, allowing up to eight injections per engine cycle. The after-treatment system includes an oxidation catalyst and a particulate filter that are close-coupled to the engine to achieve future emissions standards.
An electronically-controlled variable geometry turbocharger generates boost pressure within the engine. The engine has torque of 406 lbs-ft beginning at 2,000 rpm, while providing effective fuel economy and reduced emissions.
The new, compact V6 powerhouse features aluminum cylinder heads and a 60-degree bank angle, 83.0mm bore and 90.4mm stroke, which results in displacement of 2,935 cubic centimeters. The engine block is made of stronger and lighter Compacted Graphite Iron (as compared to lower- strength aluminum or heavier gray cast iron) to optimize engine packaging, weight, refinement and performance.
GM expects that half of its Cadillac CTS sales in Europe will have the all-new diesel engine.
