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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:

Nissan recalls 640k crossovers for wiring issue, hood release

The National Highway Traffic Safety Administration has announced two separate recalls affecting hundreds of thousands of Nissan crossovers. The larger of the two involves the electrical system in 2008-2013 model year Rogue CUVs. In affected vehicles, a mixture of moisture and salt seeping in through the carpet on the driver's side could cause the harness connector to short, potentially causing a fire. The issue involves Nissan Rogues manufactured between March 7, 2007, and November 26, 2013, as well as examples of the 2014 Rogue Select manufactured between September 23, 2013, and July 2, 2014. All told, that comes to an estimated 468,815 units in the United States alone. The second recall affects the relatively smaller quantity of 170,665 vehicles, made up of 2013-14 Nissan Pathfinder, 2014 Pathfinder Hybrid, 2013 Infiniti JX35, 2014 QX60 and 2014 QX60 Hybrid models. (The JX35 was recently relabeled as the QX60 under Infiniti's new nomenclature.) The issue affecting some of those vehicles revolves around a hood release cable that may not properly latch. Nissan is notifying owners of the affected units to bring their vehicles in to have the wiring checked and to replace the harness connector and seal in the former case, and to have the hood release mechanism modified in the latter. All told, an estimated 639,480 vehicles are being recalled as part of the two campaigns. RECALL Subject : Electrical Short Due to Water Seepage Report Receipt Date: JAN 26, 2015 NHTSA Campaign Number: 15V032000 Component(s): ELECTRICAL SYSTEM Manufacturer: Nissan North America, Inc. SUMMARY: Nissan North America, Inc. (Nissan) is recalling certain model year 2008-2013 Nissan Rogue vehicles manufactured March 7, 2007, to November 26, 2013, and 2014 Nissan Rogue Select vehicles manufactured September 23, 2013, to July 2, 2014. The affected vehicles may experience an electrical short in the harness connector due to a mixture of snow/water and salt seeping through the carpet on the driver side floor near the harness connector. CONSEQUENCE: An electrical short can cause a vehicle fire. REMEDY: Nissan will notify owners, and dealers will inspect the kick panel wiring harness connector and will if necessary install a new harness connector and waterproof seal, free of charge. The manufacturer has not yet provided a notification schedule. Owners may contact Nissan customer service at 1-800-647-7261.

Reveling in the reveals: BRZ, Civic, Wrangler, QX55

It’s almost like there should have been an auto show this week. If youÂ’re an enthusiast, you know the week before Thanksgiving is when the Los Angeles Auto Show kicks off. This year, thereÂ’s no L.A. show, at least until next May. But Subaru, Honda, Jeep and Infiniti rolled out significant new products this week, making us almost nostalgic for auto shows. Serendipity, or more likely previously allocated marketing budgets, gave us a familiar feel of new products, even though we couldnÂ’t feel or touch them under the bright lights of the Los Angeles Convention Center. LetÂ’s break them down: 2022 Subaru BRZ 2022 Subaru BRZ View 62 Photos Subaru stuck to basic formula here: The 2022 BRZ remains a rear-wheel drive sports coupe thatÂ’s supremely lightweight, adequately powered and attractive. Subaru debuts its new boxer four-cylinder in the BRZ. ItÂ’s rated at 223 hp and you need to rev all the way to 7,000 rpm to achieve that output. I'd prefer a bit more than the 184 lb-ft of torque the powerplant offers (reasonably low in the band at 3,700 rpm), for some more off-the-line grunt. Say 200 lb-ft, though itÂ’s almost a cliche to argue the BRZ is underpowered.  The outgoing BRZ is one of the purest cars IÂ’ve driven, so rather than harp on the power, which will ultimately be fine, give Subaru props for focusing on chassis improvements to improve rigidity by 60 percent and aid turn-in. Admirably, the curb weight is less than 2,900 pounds, and the manual in Premium trim checks in at the lowest, just 2,815 pounds.  Aesthetically, I like it. ItÂ’s busier than before, and thereÂ’s a lot more going on with the front fascia, wheel arches and fenders. ThereÂ’s a bit of a Porsche vibe up front, which is good, and a bit of a Honda Civic vibe in back (think 2010) thatÂ’s not.  ItÂ’s impressive that Subaru resisted the urge to gratuitously power up the BRZ and remained focused on the essence of its goodness and appeal to enthusiasts. 2021 Jeep Wrangler 392 2021 Jeep? Wrangler Rubicon 392 View 75 Photos What effect will the 2021 Ford Bronco have on the Jeep Wrangler? One school of thought is that it will actually make the Jeep better, and the 2021 Wrangler 392 is proof positive that will be the case. With the Bronco attracting spectacular levels of attention, Jeep could not sit idly by and remain focused on incremental changes. It needed to make a splash.