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Infiniti Q50 steer-by-wire system took 10 years to develop [w/video]

Infiniti's Direct Adaptive Steering (DAS) is quite a novelty - the system employs no physical connection between the steering wheel and the front wheels under normal circumstances and instead relies on a computer, clutch and steering-angle actuator to guide vehicles down the road with input from the driver.
In our First Drive review of a 2014 Infiniti Q50 equipped with the system, we weren't overly impressed by the artificial feedback. But we can't help but be impressed with how long Infiniti spent on its development: a full 10 years, according to Autoline Daily in the video report below. A staggering 70 percent of the research and development time spent on DAS was devoted to getting the steering feel right, and unfortunately, our first impression suggests their results still leave something to be desired, as we found it lacked the sporty feeling a sport sedan should have.
The weight of DAS is comparable to that of a conventional steering system due to its complexity. For example, three ECUs are used in the first-generation DAS system to ensure there's never a loss of steering, but Infiniti is refining the technology and is working to simplify it to reduce weight. One day Infiniti hopes that only one ECU will be needed to control DAS. We just hope it doesn't take the Japanese automaker another ten years to get the steering feel right.

2017 North American Car, Truck, and Utility of the Year entries announced

Over 40 vehicles will compete for the 2017 North American Car, Truck, and Utility of the Year awards. If that name looks a little strange, it's because the competition added a third category. In years past, pickup trucks, crossovers, SUVs, commercial vans, and minivans competed for the same award. That's why there were occasionally weird comparisons, like last year's competition between the Volvo XC90 and Nissan Titan XD. The new format separates pickups and commercial vans into the truck contest and CUVs, SUVs, and minivans into the utility competition. A complete list of eligible vehicles is below, but here are a few highlights. For one, the entire list of entries has a luxurious lean. Of the 43 vehicles, nearly half of them are from premium brands. There are two eligible Bentleys – the Bentayga and Mulsanne – the Rolls-Royce Dawn, Jaguar F-Pace, Audi Q7, and the Mercedes-Benz GLS-, E-, and S-Class Maybach. The performance ranks are lofty, too, with the Audi R8, Acura NSX, Alfa Romeo Giulia, Mercedes SL- and SLC-Class, Porsche 718, and F-150 Raptor. The mainstream entries are just as comprehensive. From the Chrysler Pacifica to the Chevrolet Cruze to the Fiat 124 Spider to the Mitsubishi Mirage, NACTOY has covered an enormous price range with this year's contestants. Of course, these are only the eligible vehicles. They'll need to run through three rounds of judging, starting in September at NACTOY's traditional Hell, MI, test drive. The Canadian and American journalists involved in the judging will announce this year's nine finalists – three in each category – on December 6. Cars Acura NSX Alfa Romeo Giulia Audi A4 Audi R8 Bentley Mulsanne Buick Cascada Buick LaCrosse Cadillac CT6 Chevrolet Bolt Chevrolet Cruze Fiat 124 Genesis G90 Hyundai Elantra Infiniti Q60 Jaguar XE Kia Cadenza Lincoln Continental Mercedes-Benz E-Class sedan Mercedes-Benz S550 Maybach Mercedes-Benz SL-Class Mercedes-Benz SLC-Class Mini Clubman Mitsubishi Mirage/G4 Porsche 718 Boxster and Cayman Rolls-Royce Dawn Toyota Prius Prime Volvo S90 SUVs Audi Q7 Bentley Bentayga Buick Envision Cadillac XT5 Chrysler Pacifica GMC Acadia Infiniti QX30 Kia Sportage Mercedes-Benz GLS-Class Jaguar F-Pace Mazda CX-9 Nissan Armada Trucks Ford F-Series Super Duty pickups Ford F-150 Raptor Honda Ridgeline Nissan Titan half-ton Related Video: Featured Gallery Bentley Bentayga View 23 Photos News Source: Automotive News - sub.

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: