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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:

Infiniti installs Taisuke Nakamura as new design chief

The cubicles and corner offices at Infiniti HQ in Japan continue to change hands. Infiniti Global Design Chief Karim Habib, only in that position for about two years since leaving BMW in 2017, has left the Japanese luxury brand "to pursue other opportunities." In his place, Nissan has elevated Taisuke Nakamura, a 26-year company veteran who is currently Nissan's program design director responsible for global design strategy, and concept car and production vehicle design. Nakamura has a stout design resume in service to both Nissan and Infiniti, having worked on the Qs Inspiration sedan concept (above) shown at the Shanghai Motor Show in April, the QX Inspiration crossover concept shown at the Detroit Auto Show this year (below), and the Prototype 10 speedster concept revealed at Pebble Beach last year (bottom). All of those were electric concepts, making Nakamura the point man for Infiniti's push into electric vehicles and hybrids, and the carmaker's introduction of a new design language. Last year, Infiniti said it would have a new EV on the market in 2021, as well as "e-Power" series hybrids with small battery packs charged by gas-powered generators.   Those EVs should fully embody the brand's new design DNA, seen initially in the recent concepts. The automaker said around the Qs reveal that the new "aesthetics are underpinned by Infiniti's desire to challenge convention and design cars which are engaging, enriching, enabling and enchanting – what the company calls its ‘4ENÂ’ approach to design." At the QX reveal in January, Habib said that as engineers made a "shift towards smarter, more compact and less intrusive powertrains, we were able to create an alternative form with flowing gestures, more engaging in character and more enriching in experience. With its long cabin, balanced proportions and muscular stance, the concept heralds in a new era for Infiniti models.” Infiniti said Nakamura takes up his post next week, Sept. 1, and will report to the same boss he has now, Alfonso Albaisa, Nissan's global design head. Aside from Habib, other top non-Japanese Nissan executives such as Daniele Schillaci, Jose Munoz and Trevor Mann have left the Japanese automaker in the recent past, since the arrest of Carlos Ghosn. The former chairman, who faces charges of fraud and misconduct, is awaiting trial in Japan over charges including enriching himself at a cost of $5 million to Nissan, Japan's No. 2 automaker.

Infiniti Q50 sedan recalled over steering software glitch

The Basics: Infiniti will recall around 60,000 Q50 sedans globally due to a glitch in the software that controls the cars' direct adaptive steering system. It's this hardware and software that allows the Q50 to steer itself autonomously under certain conditions. A total of 28,182 Q50 sedans will be recalled in the US, with another 3,804 in Canada. We're not certain yet which model years will be recalled, but the direct adaptive steering debuted in 2014. The Problem: According to Infiniti spokesperson Stefan Weinmann, "in certain rare circumstances, just after starting the vehicle" a software glitch "can lead to a lack of steering responsiveness and change in turning radius." Injuries/Deaths: None reported. The Fix: Infiniti hasn't yet announced how it will fix the issue, but a software update seems likely. That means a trip to the dealership. If you own one: Expect to hear from the manufacturer later this month or next. Related Video: Featured Gallery 2017 Infiniti Q50S 3.0t Recalls Infiniti Safety Technology Autonomous Vehicles Sedan infiniti q50