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New details emerge on Inifiniti QX50’s unique new variable-compression engine

Infiniti will release the world's first production variable-compression engine when it releases the 2019 QX50 midsize SUV sometime next year. Now we have some new details on the innovative new engine, which Infiniti is calling VC-T, for Variable Compression Turbo, after the luxury brand offered a prototype test drive. We wrote extensively about the complicated technology underpinning the new engine last year. It's the latest novel development that could represent a range-extender, if you will, for the embattled internal combustion engine in an era when automakers and governments are shifting their focus to electric vehicles. The VC-T is a new inline-four, 2.0-liter that combines the power of a high-performance turbo gasoline engine with the torque and efficiency of an advanced diesel engine, but without the latter's notorious emissions. It features the ability to seamlessly raise or lower the stroke of the pistons in the combustion chamber, depending on the driving conditions it detects and inputs from the driver, to select the best compression ratio—anywhere between 8:1, typical for high-performance engines, and 14:1 for high efficiency. In essence, it delivers the performance of a V6 but is much more efficient, with improved fuel efficiency of between 10 to 15 percent with its best competitors, per Car and Driver. You can view how it works in motion via the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. It's also quieter, more lightweight and compact than V6 engines with comparable power outputs, estimated at 268 horsepower and 288 pound-feet of torque. In a prototype test drive, Car and Driver writes that the engine "felt very conventional" and responsive, with strong and smooth acceleration. "The only indication you have that the compression ratio is changing is from an indicator in the instrument cluster next to the boost gauge." The engine is expected to deliver fuel economy gains of 27 percent in combined city-highway EPA rating over the outgoing QX50, which had a 3.7-liter V6. The 2019 model, fitted with the VC-T, should get about 26 mpg in combined fuel economy, and it will get to 60 mph almost one second faster than its four-cylinder counterparts, Nissan's chief powertrain engineer, Shinichi Kiga, told Automotive News. The VC-T engine is the result of 20 years of development spanning more than 100 prototypes and around 300 patents at Nissan.

Nissan tests fully autonomous ProPilot tech on Tokyo roads

We've been hearing a lot about Nissan's ProPilot technology lately. ProPilot Assist is coming to the U.S. in the Rogue, as well as the Leaf EV. For this generation, the system allows for Level 2 autonomous driving, which is essentially adaptive cruise control paired with a lane-keeping function. Later, Nissan will add ProPilot Park, which allows the car to park itself. The next generation of ProPilot, though, allows for Level 4 fully autonomous driving, even on urban streets, beginning in 2020. Nissan has announced that it has already tested it on public roads during a demonstration in Tokyo. The prototype test vehicle is an Infiniti Q50. It's fitted with 12 cameras, 12 sonar sensors, nine millimeter-wave radar sensors, six laser scanners and high-definition mapping, all run through artificial intelligence. With this combination of hardware and software, the Q50 prototype can navigate across town or on the highway, automating the entire driving duties from the moment the passenger selects a destination until their arrival. It can tackle busy intersections and respond to obstacles in the road, providing what Nissan claims is a "human-like driving feel that gives passengers peace of mind." View 29 Photos "Our next-generation ProPilot prototype showcases technology that will be available for real-world use from 2020," said Takao Asami, Nissan's senior VP of research and advanced engineering. "Today's demonstration is another example of our successful work toward creating an autonomous driving future for all." Autoblog has already had the chance to sample the current generation of ProPilot Assist, in both the Leaf and the Rogue. While there has been a little bit of disagreement in our office, most of us have found the technology to work fairly well, and are looking forward to trying the next generation of semi-autonomous and autonomous systems. As the tech advances, it will only get smoother and smarter. Related Video: News Source: Nissan Green Infiniti Nissan Technology Emerging Technologies Autonomous Vehicles Electric Videos Sedan nissan propilot propilot

The Nissan Patrol may become America's next Armada

Plausible rumors are swirling that the Nissan Patrol, the Land Cruiser rival sold outside of North America, might come to the US as a replacement for the unrelated Nissan Armada. That large SUV's future was left ambiguous after the news of the Xterra's discontinuation, as Nissan's press release ominously promised information on the Armada "at a later date" without further elaboration. That left us scratching our heads and thinking that, perhaps, it would be quietly killed off in the future. If the rumors are true, it will be. And then it will be reborn. It'll join its old platform-mate, the Infiniti QX80, on the Patrol platform. The QX abandoned its Titan-based platform in 2011, becoming the Patrol-based QX80. So you can think of the Armada as catching up, a few years late. The QX80 was refreshed last year, a mainly cosmetic nip-and-tuck. The Infiniti utilizes the 5.6-liter, 400-hp V8 and a 7-speed auto, so it's a safe bet that this powertrain will make it into the Armada version. Less likely, but plausible, would be the availability of the new powertrains intended for the Titan XD and upcoming lower-grade Titans. The massive SUV market tends to be a bit conservative, so the Cummins diesel V8 that's the sole engine in the Titan XD right now seems unlikely. The forums are abuzz with a photo of what's purported to be a leaked marketing image of the new Armada, so head to this TitanXDForum thread if you'd like to see what that's about. (Spoiler: it looks a lot like the Patrol above, minus some of the Nismo flair.) Related Video: