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Mercedes-Benz unveils its revamped G-Class

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The all-new G-Class makes its public debut at the Detroit auto show in the USA this month in G550 form. Completely redeveloped and fitted with a 4.0-liter V8 biturbo gasoline engine offering 427ps and 450 lb-ft of torque at 2,000rpm to 4,750rpm, despite near-identical looks to its predecessor plenty has changed for the Mercedes-Benz SUV.


Ford’s F150 pickup gets its first diesel motor

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Developed by the powertrain team behind the 6.7-liter Power Stroke engine for super duty trucks, the all-new 3.0-liter V6 Power Stroke unit promises 250ps, 440 lb-ft of torque, and an anticipated 5175kg of towing capacity.


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In light of Fisker's solid-state battery breakthrough and claims of a one minute charge time, will this electric vehicle technology development kick-start mass BEV uptake? 

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Volvo reveals High Performance Drive-E Powertrain Concept

Volvo has revealed details of the High Performance Drive-E Powertrain Concept - a triple boost 2-liter four-cylinder petrol engine with no less than 456ps.

 


Following the introduction of Volvo’s Drive-E Powertrain range in 2013, Volvo’s powertrain team once again set out to deliver a unique combination of performance and efficiency, further developing emission-reducing turbo technology.

“When we launched the Drive-E powertrain family, our aim was to deliver the most advanced four-cylinder engines in the industry based on emissions and fuel consumption relative to performance and drivability. We knew that 324ps in our petrol configuration was just a starting point. The 456ps High Performance Drive-E Powertrain Concept demonstrates this ambition and the versatility of the Drive-E Powertrains,” says Peter Mertens, senior vice president for research and development at Volvo Car Group.

 


The High Performance Drive-E Powertrain Concept is based on a set of technologies not usually found in a four-cylinder engine. The engine utilizes two parallel turbochargers, which are fed by an electrically powered turbo-compressor. The compressed air from this unit, rather than being fed to the cylinders, is instead used to spool up the two parallel turbochargers. Fuel is fed by a dual fuel pump working at 250 bar. With this kind of power density, this triple boost installation and unique fuel system enables very dynamic drivability without any turbo lag, compared to a mono-turbo.

“There are several high power small size applications where one large turbo is used to create a high level of power available from other manufacturers, but the driving experience suffers due to slow engine response. We felt that with our heritage of being among the first car companies to embrace and offer a broad range of turbo technology since 1981, that we could improve this,” says Michael Fleiss, vice president of powertrain engineering at Volvo Car Group.

 


The High Performance Drive-E Powertrain Concept attracted the attention and involvement of Volvo suppliers AVL, Denso and Volvo Polestar Racing at an early stage, which allowed theories and technologies from racing applications to be infused in the development process.

“This was a very exciting project, as we pioneered a combination of technologies in the same application, and the result is a quite unique engine with its high power yet quick response. Above all, its compact size improves weight distribution between the front and rear axle and lowers the center of gravity – two factors that have a significant effect on the handling, whether it is a race car or a street car,” says Mattias Evensson, race engine director at Volvo Polestar Racing.

“It may sound odd, but this 456ps powertrain concept is an important part of the Drive-E development program. Downsizing must offer customers attractive and usable power for broad scale emissions reduction to work. Compact powertrains free up space and weight in the structure of the car, which can be used for electrification and even further emissions reduction. And that is our ultimate ambition,” concludes Mertens.

9 October 2014


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