Infiniti to debut variable compression ratio engine

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Infiniti will present its VC-T (Variable Compression-Turbocharged) engine, a production-ready variable compression ratio engine, on September 29 at the 2016 Paris Motor Show (Mondial de l’Automobile).

Following more than 20 years of development, Infiniti’s new four-cylinder turbocharged gasoline VC-T engine represents a major breakthrough in internal-combustion powertrain technology.

“VC-T technology is a step change for Infiniti,” said Roland Krueger, president of Infiniti Motor Company. “It is a revolutionary next-step in optimizing the efficiency of the internal combustion engine. This technological breakthrough delivers the power of a high-performance 2.0-liter turbo gasoline engine with a high level of efficiency at the same time.”

Infiniti’s proposed engine technology works by raising or lowering the height the pistons, via an actuated crankshaft. As a consequence, the displacement of the engine changes and the compression ratio can vary anywhere between 8:1 (for high performance) and 14:1 (for high efficiency). This is controlled by an ECU algorithm that automatically applies the optimum ratio, depending on what the driving situation demands.

Infiniti is claiming several end-user benefits to the VC-T technology, such as significantly reduced fuel consumption and emissions, greatly reduced noise and vibration levels; it is also lighter and more compact than comparable conventional engines.

August 17, 2016

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Dean has been with UKi Media & Events for over a decade, having previously cut his journalistic teeth writing and editing for various automotive and engineering titles. He combines extensive knowledge of all things automotive with a passion for driving, and experience testing countless new vehicles, engines and technologies around the world. As well as his role as editor-in-chief across a range of UKi's media titles, he is also co-chair of the judging panel of the International Engine of the Year Awards.

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