Integral Powertrain supports Bentley Motors
by John McLean

Engine technology specialist and sister company Integral Powertrain Ltd has worked with Bentley Motors on a major emissions and performance upgrade for the 2007 Model Year Arnage model. IP used its advanced simulation technology to provide Bentley with an analysis to enable the development of a more powerful and responsive version of its mighty 6 ¾ -litre V8 engine that now meets the most stringent global emissions regulations, without the need for unusual or complex aftertreatment.

The Bentley Arnage is the quintessential British luxury car, but underneath its classic, restrained styling, the Arnage is a highly sophisticated vehicle that is constantly evolving to meet the demands of its owners.

Among the challenges faced by Bentley’s engineers was the need to meet demanding US emissions regulations, while delivering effortless performance and driveability. The 2007 MY Arnage now meets CARB LEV-2 as well as Euro Stage 4 emissions standards, while producing 500bhp and 1000Nm of torque.

“We have worked with Bentley on a number of projects over the past five years,” explains John McLean, IP’s head of powertrain controls, “So we had demonstrated our ability to tackle challenging engineering projects and deliver solutions that have met its extremely demanding standards. We’re proud that Bentley trusted us to support it with these major upgrades to the Arnage’s engine and delighted to have helped deliver such an impressive result”

“We are pleased with the improvements to performance and responsiveness delivered to the Arnage,” said Roger Duckworth, IP’s head of engine development. “The changes should be immediately noticeable to Bentley’s customers”

To meet one of the world’s most demanding emissions standards in a 6 ¾ -litre, V8-powered vehicle weighing 2585kgs, IP employed its armoury of sophisticated simulation methods. Control system simulation and model-based calibration tools were used to optimise vehicle driveability and emissions performance. To comply with stringent engine misfire monitor legislation, dynamics simulation tools were used to revise the Bentley engine’s valvetrain, improving its performance.

The Arnage V8 is now set to continue its long history of powering Bentley’s most prestigious products for many years to come and Integral Powertrain is proud to have been part of the team that achieved this major milestone.

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