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Basic Continuously Variable Transmission explained with Legos

In recent years, the search for better fuel efficiency and smoother shifting has produced automatic transmissions with double-digit gears. Alternatively, the same quest has boosted the popularity and usage of a different type of automatic transmission without any fixed gears, the continuously variable transmission, or CVT. YouTuber Sariel's Lego Workshop recently took the time to build a CVT demonstration model out of Legos to help explain how they work. Sariel begins by showing the model's input and output shafts that are parallel to each other. Each shaft has a cone attached to it, and they are inversely placed so that the large part of one cone is next to the small part of the other cone. The two cones are connected using a rounded rubber band.  By shifting the rubber band up and down the cones, the machine changes the effective ratio between the cones. So, a 1:4 ratio can be smoothly transitioned to 4:1. No clutch is required to operate the mechanism, and it eliminates hitches or pauses between gear changes. CVTs are also advantageous over 9- or 10-speed automatics in that they are far less complex and weigh less.  To demonstrate how the CVT operates in a vehicle, Sariel used a joke about Top Gear. The original Top Gear is represented by a faster-moving car that has the rubber band around the large part of the cone on the input shaft. Top Gear without former hosts Richard Hammond, Jeremy Clarkson, and James May is represented by a slow-moving car with the rubber band around the large part of the cone on the output shaft.  For an even more detailed explanation of how CVTs work — albeit one that doesn't involve toys — you can click here. Technology Toys/Games Nissan Subaru

Nissan to pursue FWD Nurburgring lap record with Pulsar Nismo

Europeans get very serious about their hot hatches. So do the Japanese. In fact there's been a whole back-and-forth lately over who makes the fastest one, and now Nissan looks set to throw its racing hat into the 'Ring.
That would be the Nürburgring, of course, where automakers trade bragging rights like baseball cards - only they don't give them up willingly. Renault set the front-drive lap record in 2008 with the previous Mégane R26.R then set the bar even higher with the Mégane RS 265 Trophy. That was before Seat stole the honors with its Leon Cupra 280, only for Renault to take them back again with the Mégane RS 275 Trophy-R. Seat is rumored to be considering a renewed assault, but it won't be the only one nipping at Renaultsport's heels in the coming years.
Honda, for its part, has made no secret of its ambition to set the record with the upcoming Civic Type R, and now word has it that Nissan is planning an assault of its own. Its weapon of choice would be an upcoming Nismo version of the new Pulsar hatchback which is just hitting the European market now as a rival to the Ford Focus, Volkswagen Golf, et al. There's no word on what its specs would be, but if it's going to challenge these players, it's going to need between 270 and 300 horsepower, a stiff suspension, big brakes and probably some sort of trick differential.

NHTSA opens investigation into Nissan's handling of airbag recall

In March of 2014, Nissan recalled eight models among its Nissan and Infiniti brands, totaling more than one million vehicles, over faulty occupant classification system software controlling the passenger airbag. The company discovered a variety of factors that would interfere with the system's ability to detect an adult passenger in the shotgun seat, resulting in an illuminated warning on on the dashboard and the passenger airbag not deploying in an accident. Yet 124 complaints submitted to the National Highway Traffic Safety Administration since the recall allege that the dealer-installed fix hasn't actually fixed the problem; some consumers say the problem persists after multiple trips to the dealer. The Detroit News reports that NHTSA is opening an investigation into the matter to determine whether a new recall is needed. The occupant sensor has been a bugbear for Nissan over the past couple of years; a much smaller recall for the issue in 2013 covered five of the eight vehicles that were recalled in 2014, and that earlier recall also continued to generate complaints after the issue had supposedly been fixed. At the same time, the company learned that in two instances there was another twist, where the dashboard warning wasn't illuminated but the passenger airbag still didn't go off in an accident. Nissan isn't alone, though, with airbag recalls on a steep upswing across the industry even before the Takata debacle.