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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 is optimistic about FCA partnership, but wants the right terms

BEIJING – Nissan is optimistic about partnering with a combined Renault and Fiat Chrysler (FCA), as long as it can protect the ownership of technology developed over two decades of working with Renault, a senior executive told Reuters. The executive, who declined to be identified because he is not authorized to speak to the media, said he was cautiously optimistic about the possibility of generating "synergies" by sharing Nissan's autonomous drive know-how, electrification and greenhouse-gas-scrubbing technologies for powertrains. But he said the possible $35 billion merger of Renault and FCA would not give FCA the automatic right to use those technologies, which it needs to meet stringent emissions regulations and better compete in a industry being transformed by electric vehicles. He also floated the possibility that Nissan could look at boosting its stake in Renault, or a merged Renault-FCA, to gain more say in shaping the future of the alliance. "We would go ahead with partnering or cooperating with FCA only if we can guarantee tangible benefits from sharing technologies with FCA and only if we can work out conditions that are satisfactory to us," the Yokohama-based executive said. "If Renault wants to pursue this deal, we feel we need to look seriously at supporting them," he said. The executive's comments highlight how Nissan could look to leverage its advanced technology to gain greater bargaining power with a merged Renault-FCA. Renault is Nissan's top shareholder with a 43.4% shareholding, while Nissan holds a 15% non-voting stake in the French automaker. That unequal partnership has long rankled Nissan, which is the bigger company by far. A Nissan spokesman referred Reuters to a statement issued on Monday, where Nissan Chief Executive Hiroto Saikawa said: "I believe that the potential addition of FCA as a new member of the alliance could expand the playing field for collaboration and create new opportunities for further synergies." "That said, the proposal currently being discussed is a full merger which — if realized — would significantly alter the structure of our partner Renault. This would require a fundamental review of the existing relationship between Nissan and Renault," Saikawa said, adding that Nissan would analyze and consider its "existing contractual relationships". BOOSTING STAKE?

Toyota, Honda, Nissan and more collaborating to increase fuel efficiency

Toyota, Honda, Mazda, Nissan, Subaru, Mitsubishi, Suzuki and Daihatsu have announced an alliance that will see a push to improve fuel economy from both gas-powered and diesel-powered engines by as much as 30 percent before the end of the decade.
The newly assembled Research Association of Automotive Internal Combustion Engines put the roughly $20-million project together, with the Japanese government committing to half the cost while the eight manufacturers will chip in the rest.
According to Automotive News, the automakers will team up and share basic research on internal-combustion engines in a bid to cut costs. Eventually, the results of the research will find its way into a production vehicle, although it's unclear just when we'll see the fruits of this partnership on the road.