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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:

2021 Infiniti Q50 and Q60 recalled for stalling issue

Infiniti is recalling 2021 Q50 sedans and Q60 coupes due to faulty engine-management software. The issue is with the engine control module (ECM). After rapid acceleration, the ECM can reduce the fuel supply to the engine too much, resulting in the engine going into limp-home mode and possibly stalling. A total of 12,943 cars are affected by the problem. Infiniti will commence the recall on May 25. Owners will be notified and asked to bring their cars in for software reprogramming. The fix will be performed at no cost. Owners who are concerned about the issue can reach out to the manufacturer at 1-800-662-6200. Infiniti's reference number for this recall is R20C5. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Nissan recalls Rogue, Pathfinder, Infiniti QX60 for seat issue

Nissan and Infiniti are recalling their 2023 Rogue, Pathfinder and QX60 SUVs and CUVs to address a potential defect in their seat frame welds that can allow the frames to fail in the event of a collision. The number of vehicles that potentially shipped with weak welds is rather small — just over 12,000 — but the issue could nonetheless lead to injury if a failure occurs during a collision.  "The driverÂ’s powered seat may not be fully secured to the seat frame on certain Nissan Rogue, Pathfinder, and INFINTI QX60 vehicles," Nissan's report to NHTSA said. "As a result of this issue, the seat frame welds may detach from the rear inboard seat bracket. If this condition occurs, it may increase the risk of injury to the occupant in the event of a crash. In addition, the seat frame assembly may not meet certain FMVSS 207 and FMVSS 210 requirements because of this condition," Nissan said.  Nissan says there's no easy way for customers to detect the issue ahead of time, and that its seats need to be inspected by a service tech to see whether it is properly secured. Dealers will be instructed to check the driverÂ’s seat rail clearance to the inboard seat bracket, and if necessary, the dealer will remove and replace the affected driverÂ’s seat cushion frame, NIssan said. The entire procedure should take less than two hours.  Owners of affected vehicles should look for notices to be delivered no later than June.  Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Recalls Infiniti Nissan Crossover SUV Luxury