A Variable Compression Engine created by Infiniti is the worlds first engine to be able to alter compression ratios on the fly. This revolutionary technology that was created back in 2003 by Nissan is now making the rounds come 2018 – dubbed the VC-T (Variable Compression turbocharged) engine.
For those of you who are not too familiar with the inner-working of an engine, the standard engines you see today hold one size of compression ratio in one engine. And being able to change that compression ratio within one engine is something engineers dreamed of for decades but were never able to achieve although ideas were introduced, they never manifested into reality.
Nissan was able to achieve a Variable Compression Engine by introducing a mechanical connecting-rod modification which it patented back in june 14, 2003 (picture above). The new advance multi-link system seamlessly raises and lowers the height of the pistons reach within the cylinders, allowing to them to work at an altering compression ratio.
The ratio ranges between a high compression ratio of 14.0:1 used during economical efficient low-road operation and a low compression of 8.0:1 during high performance and turbo boost to prevent engine knock. The basics of it; is that the technology can control the height of which each piston reaches during the cycle to manipulate the utilize the conditions of the driving.
The VC-T engine should be replacing the current 3.5-liter V6 engine in the line-up with a 2.0-liter displacement aided by a turbocharger. Power is expected to be around 270-hp and 288 lb-ft of torque while economy is going to be 27% more economical than the normal petrol engine. Infiniti also says their new VC-T Variable Compression Engine is going to be smoother than the current larger V-6 unit and lighter and more compact than the four-cylinder. Expect to see more information on September 29 at the Paris auto show.