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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? 


Vibracoustic develops new overrunning damper isolator pulley

Vibracoustic has developed an all-new overrunning damper isolator pulley as the company attempts to reduce fuel consumption and emissions by up to 1%. The solution for efficient auxiliary integration in a drivebelt prevents sagging to significantly improve efficiency.

While the performance of downsized engine units has improved, maximum harmonization of the ensuing forces and vibrations on start-up of the engine presents a constructional challenge.

During the very first second of engine start-up, huge forces need to be controlled at near-idle speeds. In addition to affecting comfort, these disharmonies also cause high stress on the auxiliaries in the belt drive.

Designed with an additional one-way clutch function for the three-cylinder engine. The one-way clutch is closed during regular driving operation. However, in the case of crankshaft rotation delay, the one-way clutch opens, enables motion, and prevents auxiliary “re-turning”.

The V-ribbed belt consequently remains adequately tensioned in each load state, even in the case of low pre-tension. The one-way clutch function enables the forces impacting on the belt on start-up of the engine to be significantly reduced.

The core components of the design include a metallic hub which is connected to the front of the crankshaft and accepts the flux of force. An elastomer spring enables the isolation function.

A metallic outer ring is enclosed, serving as the inner running surface of the one-way clutch. Two cage structures ensure the secure one-way clutch positioning. The outer ring of the one-way clutch then provides the connection to the pulley, through which the V-ribbed belt for the auxiliary drive runs.

Written by Sam Petters

27 October 2017


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