INFINITI Variable Compression Turbo Engine

When does the Variable Compression Turbo Engine use higher compression ratios?

During highway cruising, while coasting, and at idle

What happens when a driver demands more power from a conventional engine?

Engine control system adds more air and fuel to combustion chamber

_____ compression ratios deliver more power, like a sprinter.

Lower

What is the lowest compression ratio available from the Variable Compression Turbo Engine?

8:1

The multi-link mechanism in the Variable Compression Turbo Engine _____, thus varying the compression ratio.

Adjusts how far up the piston travels

Balance shafts are commonly used in conventional 4-cylinder engines to ________.

Counteract engine vibration

What is the highest compression ratio available from the Variable Compression Turbo Engine?

14:1

The Variable Compression Turbo Engine has _____.

A single control shaft

When does the Variable Compression Turbo Engine use lower compression ratios?

Under hard acceleration or heavy loads

What determines an engine's compression ratio?

Length of the piston's stroke within the cylinder

Higher compression ratios result in _____, like a marathon runner.

Better fuel efficiency

What two fuel delivery systems are used in the Variable Compression Turbo Engine?

Direct Injection Gasoline (DIG) and multi-port fuel injection (MPI)

Conventional production automobile engines have a ____ connecting rod.

Fixed-length

What is the purpose of the turbocharger in the Variable Compression Turbo Engine?

Increase the air charge entering the engine

Which friction-reducing technologies are used in the Variable Compression Turbo Engine?

Mirror bore coating on cylinder walls Diamond-like coating on valve lifters Microfinishing on crankshaft and camshafts

In INFINITI's Variable Compression Turbo Engine, what takes the place of a fixed-length connecting rod?

Multi-link mechanism