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Fiat Chrysler electrifies the Ram 1500 truck

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Unveiled at the 2018 Detroit auto show, the 2019 Ram 1500 has shed 100kg and added e-torque power. Available with a 5.7-liter Hemi V8 or a second-generation 3.6-liter Pentastar V6 engine, the 1500 uses mild-hybrid capability to recapture energy during deceleration to enable start/stop function as well as short-duration torque addition.


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.


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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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Cummins unveils advanced turbo simulation system

Representing an industry first, Cummins Turbo Technologies has developed a ‘virtual turbocompound’ that is capable of reducing the complex process of engine turbocompound matching from months to weeks. The cutting-edge simulation system evaluates the inter-dependent relationship between the turbocharger, engine, power turbine and power turbine drivetrain in order to optimize performance.

Known internally at Cummins as the Emulator, the system utilizes hardware-in-the-loop in order to assess system performance under different operating conditions and enables the appropriate turbocharging and turbocompounding solution to be adapted then matched to the target engine.

The Emulator’s creator, Kai Zhang, said: “When using the Emulator, the turbocompound system is effectively replaced by a mathematical algorithm that has been specifically written to behave as the system would - subjecting both the engine and ancillary systems to the same conditions as a conventional real-world test.

“However, whereas engine development currently requires extensive physical testing of prototype hardware, the Emulator removes this need and enables any alterations to the characteristics of the turbocharger to be made, via a few keystrokes, in minutes rather than weeks.”

Zhang, who previously developed the method during his PhD, has worked in partnership with a Cummins Turbo Technologies customer who supplied both the engine under development and operating range parameters.

The successful matching and integration of a turbocharger and engine is critical and increasingly complex on modern day diesel engines, accuracy is therefore paramount.

Dr Zhang explains: “Simulating a turbocompound system presents some unique technical challenges - for example the need to ‘capture’ power from the exhaust gas and transfer this to the engine’s crankshaft via a reduction gear train must all be done virtually – necessitating the development a real-time power turbine algorithm capable of replicating the effect of an exhaust pressure valve.

“Engine testing and development work currently requires months of physical testing and has a correspondingly high cost due to the iterative process of revising and retesting components. So, whilst further refinement is on-going, now that we have proven the Emulator’s potential we will actively be seeking opportunities to utilize it with other turbocharger solutions in order to significantly reduce our customers’ lead times.”

 

6 February 2013


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