Nissan to unveil breakthrough variable compression engine at Paris showPOSTED BY Nigel Andretti ON 16 August 2016
NISSAN subsidiary, Infiniti, will introduce a production-ready variable compression ratio engine VC-T (Variable Compression-Turbocharged) at the 2016 Paris Motor Show (Mondial de l’Automobile) in September.
Infiniti said that the new four-cylinder turbocharged gasoline VC-T engine has been in development for more than 20 years. (Nissan was awarded a patent in 1995 on compression ratio control for an engine.)
The 2.0-litre, four-cylinder VC-T engine averages 27 percent better fuel economy than the 3.5-litre V6 engine it replaces, with comparable power and torque. Nissan also says the new engine matches diesel engines for torque.
Infiniti engineer Kinichi Tanuma, a senior Nissan engineer working for Infiniti, says the technology could replace diesel motors.
“We think the VC-T engine could replace or become an alternative to some of today’s advanced diesel engines,” he says.
“Diesel engine is a hot topic globally. We believe this new engine of ours is an ultimate gasoline engine that could over time replace the (advanced) diesel engine of today.”
Infiniti’s VC-T engine technology seamlessly raises or lowers the height the pistons reach. As a consequence, the displacement of the engine changes and the compression ratio can vary anywhere between 8:1 (for high performance, with the turbo) and 14:1 (for high efficiency). The engine control logic automatically applies the optimum ratio, depending on what the driving situation demands.
“VC-T technology is a step change for Infiniti. 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,” said Roland Krueger, president of Infiniti Motor Company.
“VC-T technology delivers multiple customer benefits including significantly reduced fuel consumption and emissions, greatly reduced noise and vibration levels; it is also lighter and more compact than comparable conventional engines.”
Infiniti will present more information on the VC-T engine at Mondial de l’Automobile on September 29 during its press conference.