So, the variable compression ratio engine can drop the ratio during periods of high turbocharger boost to keep knock from happening, while increasing the ratio during periods of lower boost, for ...

Read the tech article on Tuning Engine Compression, ... An engine's compression ratio is actually a theoretical number. ... it ignores one crucial variable.

Infiniti is putting the pressure on its competitors. The automaker has revealed plans to introduce the first production-ready engine with a variable compression ratio that promises to improve ...

Exploring Rocker-arm Ratio and Cam-phase Tuning - Project Pure Poncho. ... That is why most modern engines employ more than one camshaft, especially when a variable valve-timing arrangement is used.

Although details are thin on the ground right now, Infiniti says that the VC-T engine can alter its compression ratio from as low as 8:1 (for high performance) to as high as 14:1 (for efficiency).

The new Infiniti VC-Turbo engine (code-named KR20) is chock-full of interesting details that come with its variable-compression-ratio trick.

In March 2000, Saab unveiled its Variable Compression Ratio (VCR) prototype vehicle, powered by a 1.6 L supercharged VCR engine named SVC (Saab Variable Compression).

Release Summary. Peregrine announces new 5-bit, 32-state digitally controlled variable capacitors which provide a monolithically integrated impedance tuning solution for demanding RF applications.

Porsche has received a patent on a new form of the variable-compression-ratio engine. This would be especially useful with turbocharged engines that today run at lower compression ratios, to avoid ...