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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:

Next Infiniti FX to gain interior volume

The Infiniti FX, soon to be renamed QX70 thanks to the Japanese brand's convoluted naming scheme, is currently in the midst of its second-generation. And while we like the compact, sporty crossover's driving character a lot, it lacks the "utility" part of the CUV moniker. That lack of cabin space will be addressed in the future, though.
Automotive News recently sat down with Nissan's global design boss, Shiro Nakamura, to talk about the future of what he called "the icon of Infiniti." And while Nakamura-san admitted the FX/QX70's worth to the brand, its sales have long been something of a disappointment. "Exterior and styling-wise, it's very strong as an icon. But to be honest, its sales volume has not been as big as we wanted," a reality Nakamura believes is due largely to its tight cabin relative to its competition.
Finding the right balance might be difficult, though. The FX/QX70 is selling extremely well in both China and Russia, according to Nakamura, because of its looks. Altering that style in order to increase interior space risks alienating a new and important group of buyers for Infiniti. The designer put it best when he told AN, " It is selling well in China and Russia because it stands out. So we want to maintain that striking look." As it stands, we'll likely be living with the current vehicle for a few more years - AN doesn't expect the third-generation of the FX/QX70 to arrive until 2015 or 2016.

Infiniti Q Inspiration Concept shows its face

Update: Infiniti released a second image of its Q Inspiration Concept with a press release about sales. We're not sure why, but we're not complaining and have added it above. The original rear three-quarter image is below in the text. Following a teaser image and some cryptic hints from designers, Infiniti has mostly revealed its concept for the Detroit Auto Show. It's called the Q Inspiration Concept, which for having "inspiration" in the name, is actually a rather uninspired name. But that's OK, because what it lacks in clever naming it makes up for in a beautiful fastback body. When the teaser was released, one of the designers mentioned the car would have a "long cabin," and that's no exaggeration, as the greenhouse reaches nearly to the tail edge of the car. It's a roofline that is highly reminiscent of the Audi A7. And as such, it would make a lot of sense for this Infiniti to be a hatchback, too, especially if it reaches production. We can't say for sure if this concept has a hatch, though, since there are some panel gaps at the base of the D-pillar and the Tesla Model 3-style rear pane of glass suggests this concept is technically a sedan. Unlike the Audi A7, the rest of the Infiniti is as curvy as the roof. There's hardly a crease anywhere, and it looks muscular with the big bulging front and rear fenders that flow effortlessly into each other. The clean exterior is accented by a lack of exterior door handles and what look to be cameras for side mirrors. The contrast to the organic curves comes from the nose and the wheels. The area where the grille would be is more chiselled and aggressive than the rest of the body. The wheels also have hard edges and lots of complicated elements that don't quite fit the organic theme of the rest of the car. Still the car overall is very striking and graceful. The press release continues to emphasize new powertrains, proportions, and the future design direction of Infiniti. As such, we suspect that this car uses, at minimum, a version of Infiniti's variable-compression engine, and more likely features extensive electrification, if not a pure EV powertrain. The lack of a large opening at the front would seem like further evidence the car utilizes electricity at some level. The car will make its full debut on Jan. 15. Related Video: Image Credit: Infiniti Green Detroit Auto Show Infiniti Hatchback Luxury Sedan 2018 detroit auto show