New type of engine?

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Mar 9, 2015
The 2019 Infiniti QX50 crossover arrives in 2018 and it will be powered by a 2.0-liter variable compression turbocharged four-cylinder engine.

It will change the distance the pistons travel in their cylinders by as much as 6 mm, or about a quarter of an inch.

Nissan’s chief powertrain engineer, says Infiniti’s VC-T engine is expected to deliver a combined city-highway EPA-rated fuel economy gain of 27 percent over the QX50s’s outgoing 3.7-liter V-6. The VC-T engine is rated at 268 hp and 288 pound-feet of torque. Kiga says the 2019 QX50 will reach 60 mph almost one second faster than its four-cylinder competitors.

The VC-T adds cost but is less expensive than a diesel engine. The VC-T engine is about 10 percent more expensive to produce than a regular 2.0-liter turbo four-cylinder engine.

The old engine had a combined city and highway mileage of 20 mpg. The new combined fuel economy should be around 26 mpg."

Variable compression engine will increase fuel efficiency by 27% |
Atkinson cycle - Wikipedia

Manufacturers are re-inventing old tech for economy purposes. Make them more complicated to run cleaner. They really just add more stuff to increase initial cost and repair cost...

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