INFINITI today unveils the all-new 2.0-liter VC-Turbo (Variable Compression Turbo) gasoline engine, the world’s first production-ready variable compression ratio engine,the four-cylinder VC-Turbo promises to be one of the most advanced internal combustion engines ever created.
With the ability to continuously transform, INFINITI’s VC-Turbo technology uses an advanced multi-link system to seamlessly raise or lower the stroke of the pistons, detecting the car’s driving condition and driver inputs, and instantly selecting the most suitable compression ratio.
The engine is able to offer any compression ratio between 8:1 (typical for high performance engines) and 14:1 (used by many manufacturers for high efficiency).The result is an engine that combines the power of a high-performance 2.0-liter turbo gasoline engine with the torque and efficiency of an advanced diesel powertrain – without the equivalent emissions – offering a compelling alternative to similarly-powered four-cylinder diesel engines.
The compression ratio is the ratio of the combustion chamber’s volume from its greatest capacity (when the piston is at bottom-dead-center within the cylinder) – to its smallest capacity (when the piston is at top-dead-center).A higher compression ratio is able to achieve greater efficiency and improved fuel consumption; lower compression ratios offer greater power and torque, particularly in turbocharged engines, but are known for reduced fuel efficiency.
The VC-Turbo engine will be comparable to certain six-cylinder gasoline powertrains for performance, while significantly outperforming them in efficiency. INFINITI’s VC-Turbo engine uses an advanced multi-link system to change the compression ratio seamlessly, actively raising or lowering the height of the pistons’ stroke. Offering any compression ratio between 8:1 and 14:1, the VC-Turbo engine offers both power and efficiency within the same engine.