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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.

Infiniti Q50 BTCC ready to race

A few months ago, Infiniti announced it would field its Q50 sedan (or a racing derivative thereof) in the British Touring Car Championship, and now the Japanese automaker has revealed the tin-top racer in its final form as it prepares to roll onto the grid. Like the rest of the BTCC field, the Q50 racer is based on the series Next Generation Touring Car (NGTC) regulations. That means it's based on the production model, and not on a control chassis (like the one you'd find in NASCAR) done up to look like the showroom version. It also means a 2.0-liter turbocharged engine driving upwards of 300 horsepower through an Xtrac six-speed sequential gearbox with AP Racing clutch, throttle by wire and the manufacturer's choice of front- or rear-wheel drive, the latter of which we assume Infiniti has chosen for its touring car. Two examples of the Q50 BTCC will be fielded by Infiniti Support Our Paras Racing, a non-profit venture with proceeds (assuming there are any) going towards the British paratroopers' charity. The team is being run by Derek Palmer Sr, whose son Derek Jr will drive one, with the other piloted by Richard Hawken, and injured paratroopers filling out the pit crew and support staff. The Infiniti Q50 BTCC will be showcased on the Dunlop stand at the Autosport International show in Birmingham this weekend. NEW Q50 BTCC LIVERY AT AUTOSPORT INTERNATIONAL SHOW Wednesday, 7 January 2015 The recently announced 'Infiniti Support Our Paras Racing' team, which will contest the Dunlop British Touring Car Championship this season, will unveil a new livery for its two NGTC Infiniti Q50 race cars at the Autosport International Show in Birmingham later this week. The new livery on the Q50, being displayed on the Dunlop stand, has been designed by Infiniti's own design team in Paddington London, further enhancing the ongoing partnership of Infiniti with the Mallory Park-based team, which will employ injured ex-Paratroopers to prepare both race cars. Simon Cox, Infiniti Design Director from Infiniti Design London, said "The new Q50 race car livery was developed to contrast against the traditional branding schemes normally associated with the BTCC grid. However, it still retains a high level of visibility, reflecting both the dynamic qualities of the Infiniti Brand along with the performance and striking contours of the Q50 road car.

Nissan Pathfinder, Infiniti JX in transmission safety probe

Nissan may be forced to recall 110,000 Pathfinder and Infiniti JX35 crossovers, due to a number of customer complaints. Consumers report suddenly losing power, with repair facilities blaming the issue on faulty transmission cooler line connections. Both the Pathfinder and JX35 use a continuously variable transmission. As of right now, the only vehicles being investigated are from model year 2013.
Nissan has been cooperating with the National Highway Traffic Safety Administration, according to a report from Reuters, and it has developed a fix for the affected vehicles. It's not clear whether this will develop into a full-blown recall, as there have been no known cases of injuries or crashes. But with a potential 110,000 vehicles prone to sudden power loss, a recall seems to be a likely outcome.