Nissan Variable Compression Turbo Engine

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Which friction-reducing technologies are used in the VC-Turbo engine?

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

What is the highest compression ratio available from the VC-Turbo engine?

14:1

When does the VC-Turbo engine use lower compression ratios?

Under hard acceleration or heavy loads

What is the lowest compression ratio available from the VC-Turbo engine?

8:1

When does the VC-Turbo engine use higher compression ratios?

During highway cruising, while coasting, and at idle

The following Nissan vehicles offer or include a VC-Turbo engine.

2022 and newer Rogue 2019 and newer Altima

What is the horsepower and torque of the Altima VC-Turbo engine?

236 hp @ 5,600 rpm and 267 lb-ft torque @ 4,000 rpm

The VC-Turbo engine has _____ .

A single control shaft

The multi-link mechanism in the VC-Turbo engine _____, thus varying the compression ratio.

Adjusts how far up the piston travels in the cylinder

In the VC-Turbo engine, what happens when the angle of the control shaft changes?

The connected multi-link assembly mechanism adjusts how far the piston travels up in the cylinder

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

Counteract engine vibration

_____ compression ratios deliver more power, like a sprinter.

Lower

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

Engine control system adds more air and fuel to combustion chamber

Conventional production automobile engines have a ____ connecting rod.

Fixed-length

What is the purpose of the turbocharger in the VC-Turbo engine?

Increase the air charge entering the engine


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