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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? 


Vehicle dynamics software could help hit RDE targets

Vehicle dynamics simulation software could cut the cost for vehicle manufacturers of meeting the new RDE (real driving emissions) tests. The software, developed by rFpro for DIL (driver in the loop) simulators, creates such a high level of realism (immersion) that drivers behave in a representative way, giving manufacturers confidence in a car’s emissions performance long before prototype testing can begin.

The need to ensure, in advance, that a vehicle will achieve the desired results during RDE testing threatens to add significant additional cost to the typical development program. Recent high profile events are putting pressure on the industry to adopt more representative emissions and economy testing sooner. Quantifying the influence of driving habits on emissions is difficult and time consuming using on-road testing, because of the variation in traffic conditions and weather from test to test. Understanding driver influenced variables, such as poor throttle modulation when cruising, or failure to anticipate traffic slowing down ahead, will be central to optimising the calibration of the vehicle.

“The introduction of RDE tests adds another level of complexity to vehicle testing, with emissions influenced by driving style and road conditions,” explained rFpro’s technical director, Chris Hoyle. “The ability to evaluate the vehicle’s behaviour under repeatable laboratory conditions using drivers of different abilities and with different habits, in order to maximise confidence ahead of approval testing, can provide a massive saving in cost and time. One of our customers estimates that over 30 percent of the costs incurred in developing driving attributes could be saved by frontloading the engineering activity on a DIL simulator with subjective feedback.”

Simulator software has already extended the use of driving simulators into the realm of meaningful ride and handling development; now rFpro is helping to evaluate how different drivers influence the emissions and economy of a vehicle under real road conditions.

“We have customers linking driving simulators to both engine and drivetrain dynos, enabling highly repeatable tests to be conducted with a human driver in control,” said Hoyle. “This allows vehicle manufacturers to identify and isolate those aspects of human driving which differ significantly from computer controlled operation, leading to improved accuracy in predicting how the vehicle will ultimately perform in an RDE test. The low variance between results allows statistical methods to be applied and saves time and cost compared to real car testing on public roads or at test facilities.”

Historically, driving simulators have reacted too slowly to driver input to create the realism necessary to trigger driver behaviour that is fully representative of ‘real-world’ driving. When used with the latest generation of lighter motion platforms with faster responses, rFpro’s software provides unprecedented realism through the use of lag-free high resolution graphics and finely detailed road surface models including cambers, gradients, bumps and potholes.

31 August 2016


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