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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 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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Continental’s electric vacuum pump reduces vehicle CO2 emissions

Ahead of the EU’s plans to impose strict limitations to significantly reduce CO2 emissions between 2015 and 2020, Continental has released a new version of its plastic electric vacuum pump (EVP) to help vehicles meet the forthcoming 130g and 95g fleet-wide limits.
“An electric vacuum pump can eliminate between 1.4g and 1.8 grams of CO2 per kilometer more, compared to a mechanical vacuum pump,” said Michael Juerging, who heads development of vacuum pumps in the hydraulic brake systems business unit of Continental’s chassis & safety division. “Since it does not rely on the engine, it can provide a vacuum even if the motor is switched off as part of a stop-start function. Restarting the engine would otherwise result in heightened emissions, if vacuum were required.”
According to Continental, the electric vacuum pump supplies all the vacuum that a car needs, including not only electric, hybrid and diesel vehicles, but also gasoline-powered engines sporting direct fuel injection. The Tier 1 supplier says it also does duty whenever modern gasoline engines are not able to supply sufficient vacuum to operate brake boosters, or vacuum-controlled and operated actuators. The electric pump’s robust design is said to allow it to function as the sole source of vacuum throughout the service life of a vehicle. By supplying vacuum on demand, the electric vacuum pump can apparently help to reduce CO2 emissions from conventional IC engines.
Continental has conducted simulations followed by road tests, both with and without electric and mechanical vacuum pumps, to determine how a vacuum pump influences a vehicle’s CO2 emissions. The test car was a small diesel with 1,560 cubic centimeters and 110ps. The results indicate that an EVP reduces CO2 emissions by between 1.4 and 1.8 grams per kilometer, depending on the type of fuel used and the size of the vehicle. Moreover, the EVP can result in even greater CO2 reductions by supporting extended stop-start functions.
The first generation of the EVP, which has been in mass production since 2008, is now available in the second generation.

14 August 2013


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