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Mercedes-Benz unveils its revamped G-Class


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


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? 


New diesel heart for Mazda 3

Mazda is strengthening its Mazda 3 lineup with the introduction of an updated, EURO 5 compliant 1.6-liter MZ-CD common-rail diesel engine, which now comes with a six-speed manual transmission.

The new diesel heart produces 115bhp at 3,600rpm and 270Nm of torque across a wider engine speed range of 1,750rpm to 2,700rpm. And while power has increased, fuel consumption has also been improved, stretching to 64.2mpg on the combined cycle. Emissions are down to 117g/km of CO2.

The enhanced MZ-CD 1.6 diesel features a reduced compression ratio — which lowers the combustion temperature — and comes with an improved, highly efficient EGR cooler and an EGR cooler bypass system that enables the engine to warm up faster when starting from cold. Further more, its standard-fit DPF is maintenance-free.

During development, the MZ-CD 1.6 engine was optimized for high levels of NVH performance. The friction of the valvetrain was reduced by adopting a simpler, two valves per cylinder, SOHC) design instead of the previous 16-valve DOHC arrangement. The precision of the fuel injection system was also enhanced.

Due to the smaller number of parts in the two-valve SOHC structure, the updated MZ-CD 1.6 diesel engine is 4kg lighter than its predecessor. Together with the new six-speed manual transmission that weighs 3kg less than the five-speed manual of the previous model, the updated powertrain achieves a total 7kg weight saving.

The MZ-CD 1.6 engine has a new variable-geometry turbocharger that is more efficient than the turbocharger fitted to the previous-generation engine. Combined with an improved compressor and turbine it allows the engine to deliver 30Nm more torque than the previous 1.6-liter diesel.

The updated common rail fuel injector system includes new piezo injectors. The fuel is injected at a pressure of 1,600bar. This high pressure facilitates more precise injection control that results in higher torque, lower fuel consumption and cleaner emissions. Also, the use of multi-pilot injection ensures smoother combustion that leads to a quieter and more comfortable drive.

17 November 2010


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