Geneva Motor Show: Cadillac unveils powerful new V6 clean diesel engine

Click on the image for two high-res images of GM's new 2.9-liter V6 turbo-diesel engine.

General Motors has debuted a new 2.9-liter V6 turbo-diesel engine, destined to find its way into the 2009 Cadillac CTS. Indicating that it will be "sold mainly in Europe", GM have signalled their intentions to go after Europe's finest in the hotly contested executive saloon market with the powerful new engine.

Delivering 184 kW / 250 hp of power and a monstrous 550 Nm / 406 ft-lbs of torque (compare this to the 155 kW and 526 Nm of the new Mercedes-Benz E320 Bluetec), the oil burner is built to match Cadillac's performance-oriented brand character. But Cadillac is likely to be far from the only brand in GM's stable which will eventually get to take advantage of this new engine; it can be installed in a longitudinal or transverse layout and can be adapted to a wide range of two- or four-wheel-drive vehicles so expect it to pop up all over.

Other high tech features include a closed-loop combustion control system which has been designed to give the engine longevity by allowing it to meet future emissions standards; state-of-the-art injection and combustion technology for low emissions and high performance; a variable geometry turbo; and an advanced engine management system for optimal fuel economy as well as reduced emissions and noise.

Analysis: GM's getting serious about the European market where you have to be packing an advanced clean diesel under the hood to be taken seriously when petrol prices are so high. It looks like a lot of work has gone into making this a really flexible engine through the emissions controls employed and its ability to be installed in a longitudinal or transverse layout. No word yet on whether it meets the latest Californian emissions standards or what the fuel economy can expect to be. I'll be looking forward to the details.

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Full press release after the jump.


[Source: GM]
Cadillac to Debut GM's Powerful New V-6 Clean Diesel

  • GM's first production application of innovative, closed-loop combustion technology
  • Cadillac CTS adds engine to its portfolio in 2009
  • Low emissions, high performance and excellent fuel economy
  • 184 kW/250 hp, 550 Nm (406 lb.-ft.) torque, 2.9-liter displacement
  • Compact design enables transverse and longitudinal installation

GENEVA – General Motors Corp. unveiled a new 2.9-liter V-6 turbo-diesel engine that features state-of-the-art injection and combustion technology for low emissions and high performance.

The new engine (184 kW/250 hp) will be sold mainly in Europe and makes its debut at the Geneva Motor Show (March 8-18). Its first production application is scheduled for 2009 in the new Cadillac CTS.

"We expect the V-6 diesel to be highly competitive in the European luxury segment," said Jim Taylor, Cadillac general manager. "With its excellent low-end torque and its high power output, it is a great fit with Cadillac's performance-oriented brand character."

The compact dual overhead cam, four-valve V-6 engine belongs to a new GM family of diesel engines, featuring an innovative closed-loop combustion control system designed to meet future emissions standards. The 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.

GM's development of the new engine is being coordinated under the leadership of GM Powertrain's European operations in Turin, Italy, in cooperation with VM Motori based in Cento, Italy . GM Powertrain will focus on the development of the clean combustion process, electronic engine control and exhaust-gas aftertreatment, as well as calibration and integration into GM vehicles. VM Motori will build the new unit at its plant in Cento, Italy, and is responsible for the mechanical aspects of the engine's design, development and bench testing.

"The V-6 diesel integrates leading technologies and will deliver outstanding performance, fuel economy and low emissions," said Roger Johansson, GM Powertrain Europe vice president.

The V-6 engine management system enables optimal fuel economy as well as reduced emissions and noise by using a recently developed combustion control technology. Key enablers of the 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 Powertrain diesel engines.

The high-pressure, common-rail system provides up to 2000 bar (29,000 psi) injection pressure. The injectors are quick-firing, piezo-electrically actuated, allowing up to eight injections per engine cycle. The aftertreatment 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. The engine has a torque of 550 Nm (406 lb.-ft.) beginning at 2000 rpm, while providing effective fuel economy and reduced emissions.

The new, compact V-6 powerhouse features aluminum cylinder heads and a 60-degree bank angle, 83.0 mm bore and 90.4 mm stroke, which results in displacement of 2935 cubic centimeters. The engine block is made of stronger and lighter Compacted Graphite Iron (compared to lower-strength aluminum or heavier grey cast iron) to optimize engine packaging, weight, refinement and performance.

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