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Infiniti's variable compression engine in the 2019 QX50 is the first of its kind

The world's first variable compression ratio engine is here, in a production car. That car is the 2019 Infiniti QX50, debuting this week at the Los Angeles Auto Show. The midsize crossover has seen a refresh that has brought it an all-new platform together with new driver assist features, but it's the engine that's the centerpiece here. Nearly everything is continuously variable under the hood of the QX50 – not only the new shift-by-wire XTRONIC CVT. The new VC-Turbo gasoline engine is able to change its compression ratio from 8:1 to 14:1, or anything in between depending of the driving situation; whether there is need for top-end power or turbodiesel-like torque from low revs, or optimized fuel economy. The pistons' reach is continuously adjusted by an electric "Harmonic Drive" motor, which controls a multi-link system, affecting the top-dead-center of the pistons and changing the compression. The engine can also switch between efficiency-maximizing Atkinson cycle and regular combustion cycle, on the go – and there's both multipoint injection and gasoline direct injection employed. The result is 268 horsepower at 5,600 rpm and 280 pound-feet of torque at 4,400 rpm; good figures for a 2.0-liter four-cylinder gasoline engine with a single-scroll turbocharger. Infiniti says that the FWD version's fuel economy of 27 miles per gallon combined is 35-percent better than the previous-generation V6 engine; in AWD guise, it reaches 26 mpg, which is a 30-percent improvement. The new engine is pretty much all-aluminum, but the vaguely magical-sounding "transformative multi-link components" behind the variable compression system are made from high-carbon steel alloy. The engine's multi-link system also enables it to do away with any balancing shafts, and Infiniti compares its smoothness to a V6 rather than a regular four-cylinder. In addition to the aforementioned tech, the VC-Turbo engine has the world's first active engine mount vibration damping system to smoothen its operation even further. Related Video:

Production Infiniti QX30 coming to LA Auto Show

Infiniti showed its QX30 small crossover in concept form at this year's Geneva Motor Show, and now, we've got confirmation that the production car will debut in Los Angeles. But this is just one of some 30 global reveals that will take place at the LA Auto Show this November. The QX30 will be a higher-riding version of the new Q30 hatchback that we'll see in Frankfurt later this month. And since the Q30 shares a lot of its underpinnings with the Mercedes-Benz A-Class, we can probably expect the QX30 to be a sort of Infinitized GLA-Class. Just picture a lifted version of the production Q30 we've already seen in teaser shots. In addition to 30 global debuts, the LA Auto Show will host 20 North American reveals, including the Jaguar F-Pace, Kia Sportage, and Bentley Bentayga that will initially be shown in Frankfurt. The only other LA show global reveal we know about right now is the 2016 Hyundai Elantra. Still, there will no doubt be a lot to talk about come November, with Alfa Romeo, BMW, Bentley, Fiat, Ford, General Motors, Honda, Jaguar Land Rover, Mazda, Mercedes-Benz, Mini, Mitsubishi, Nissan, Porsche, Subaru, and Volkswagen all confirming that they'll have something to show in Los Angeles. Naturally, we'll be on site with our usual obsessive auto show coverage. Related Video: THIRTY WORLD DEBUTS CONFIRMED FOR 2015 LOS ANGELES AUTO SHOW 50 total reveals expected and will be streamed live by CNET from the show floor LOS ANGELES, CA (September 2, 2015) – The Los Angeles Auto Show (LA Auto Show®) announced today that 30 world debuts, totaling 50 vehicle unveilings overall, will be introduced in front of media, analysts and automotive industry executives during its Press & Trade Days, November 17-19, 2015. Almost every manufacturer will be making news, and while most have yet to announce details, a few manufacturers have begun to share their debut plans. Specifically, Infiniti will have a global reveal of its all-new QX30 crossover and Hyundai will host the world premiere of its all-new Elantra. Other debuts include Jaguar's first luxury SUV, the F-PACE, and Kia's next generation Sportage. Other automakers officially confirming premieres include Alfa Romeo, BMW, Bentley, Fiat, Ford Motor Company, General Motors, Honda, Jaguar Land Rover, Mazda, Mercedes-Benz, MINI, Mitsubishi, Nissan, Porsche, Subaru and Volkswagen.

Infiniti Q30 spied again

The Infiniti Q30 is back in the news thanks to the imminent debut of the QX30 Concept as its crossover counterpart at the upcoming 2015 Geneva Motor Show. The siblings are Infiniti's entrants into the popular premium compact ranks, and the standard hatchback was recently spotted in Europe with the least amount of concealment yet. Granted, this tester is still pretty heavy camouflaged, but this is a lot better aesthetically than the previous garbage-bag-covered look. While the pattern makes specifics hard to discern, the translation from the motor show stand to the road appears to be leaving the Q30 Concept's styling largely intact. Up front, the squinting headlights and swollen-rectangle shape of the grille remain similar, and while they are pretty hard to spot, the slashes down the side are faintly visible from some angles. The rear hews even closer to the original design with a comparable shape for the taillights and hatch, but exhausts are much smaller on this test car. Underneath the skin, the Q30 reportedly shares its platform with the Mercedes-Benz GLA-Class, and the engine is also expected to be the 2.0-liter turbocharged four-cylinder available in Mercedes' compact lineup. Official details should start spilling out soon, though, because Infiniti wants production of the hatchback to begin in 2015 at the Sunderland plant in the UK. A launch for the US market is expected in 2016. Featured Gallery Infiniti Q30 Spy Shots Image Credit: CarPix Spy Photos Infiniti Hatchback Luxury infiniti q30 infiniti q30 concept