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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 recalls Q50 and Q70 Hybrid models

Infiniti is issuing three separate recalls for its Q50 Hybrid and Q70 Hybrid and M35 Hybrid covering roughly 13,794 vehicles in North America.
The larger campaign listed by the National Highway Traffic Safety Administration covers 5,831 examples of its 2014 Q50 Hybrid (shown above) and 2014 Q70 Hybrid in North America, with 5,412 of those in the US and its territories. According to NHTSA, "due to a software error, the electric motor may stop working while the vehicle is being driven using the electric motor only," creating a "stall-like condition." To fix the fault, the company is reprogramming the motor inverter software, and owners should be contacted in mid-November.
The second recall covers just 890 2014 Q50 Hybrid and 2014 Q70 Hybrid models in North America, with 817 of those residing in the US. It's possible that their transmission housings were damaged during manufacturing, and on affected models, the housing could have a crack that might fracture while driving. Dealers will inspect the transmission and faulty examples will be replaced.

NHTSA probing 400,000 Infiniti, Honda vehicles over steering faults

As many as 391,000 vehicles from Infiniti and Honda may eventually need to be recalled as a result of two, separately announced Preliminary Evaluations from the National Highway Traffic Safety Administration to ascertain the scope of the potential safety hazards.
The larger investigation has NHTSA looking into the 2013 Honda Accord because of 24 reports from drivers alleging total loss of power steering or a sudden increase in necessary effort to turn the vehicle. In four cases, the problem is reportedly linked to crashes, with all of them occurring at less than 30 miles per hour. According to the claims, 13 people also reported seeing a warning message during the failure. Turning off the car and restarting it would fix the issue in some cases. If a recall is necessary, it could affect an estimated 374,000 Accords.
The second investigation is much smaller in scope. The safety agency is investigating the 2008 Infiniti EX35 after two complaints of the steering wheel shaft separating, and the vehicle losing the ability to steer. Both reports allege that the steering became loose when driving and then completely failed once the vehicle was stopped. A recall for the problem would affect an estimated 17,000 vehicles. Scroll down to read NHTSA's reports on both Preliminary Evaluations.