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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

Subaru recalling 72k EyeSight-equipped sedans and CUVs

Despite critical acclaim, the Subaru EyeSight system is in a bit of trouble today. Some 72,000 cars and crossovers equipped with the comprehensive active safety suite are being recalled. Affected vehicles include the 2015 and 2016 model year Legacy sedans built from March 10, 2014 to April 16, 2015, Outback crossovers built between February 24, 2014 and April 16, 2015, XV Crosstrek CUVs built from October 16, 2014 to April 15, 2015. Also included are EyeSight-equipped 2016 WRX sedans built after March 23, 2015. The problem rests with the EyeSight system's pre-collision braking system, or perhaps more accurately, the switch that activates the brake lights. According to the bulletin from the National Highway Traffic Safety Administration, should that switch fail, not only will the brake lights not turn on, the automatic braking system won't work either. Subaru is in the process of notifying owners, who will need to report to dealers to have the system reprogrammed. Scroll down for the official notification from NHTSA. Related Video: Report Receipt Date: JUN 12, 2015 NHTSA Campaign Number: 15V366000 Component(s): EXTERIOR LIGHTING , FORWARD COLLISION AVOIDANCE Potential Number of Units Affected: 72,000 Manufacturer: Subaru of America, Inc. SUMMARY: Subaru of America, Inc. (Subaru) is recalling certain model year 2015 Legacy vehicles manufactured March 10, 2014, to April 16, 2015, Outback vehicles manufactured February 24, 2014, to April 16, 2015, Impreza vehicles manufactured September 9, 2014, to April 14, 2015, XV Crosstrek vehicles manufactured October 16, 2014, to April 15, 2015, and 2016 WRX vehicles manufactured March 23, 2015, and equipped with the Eyesight Driver Assist System. If the switch that activates the brake lights fails, the automatic pre-collision braking component of the driver assist system will not function. CONSEQUENCE: If the automatic pre-collision braking system does not function as intended, the vehicle will not react to an obstacle in its path, increasing the risk of a crash. REMEDY: Subaru will notify owners, and dealers will reprogram the driver assist system, free of charge. The manufacturer has not yet provided a notification schedule. Owners may contact Subaru customer service at 1-800-782-2783. Subaru's number for this recall is WQS-54. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

2018 Subaru Ascent three-row crossover SUV spotted showing off its shape

These images give us our best look so far at the Subaru Ascent, a new-for-2018 three-row crossover to fill the hole in Subaru's product lineup since the unloved Tribeca was discontinued after 2014. This prototype is lightly coated in a body-hugging camouflage wrap and appears to take its design from the Highlander-on-steroids Viziv-7 Concept that debuted at November's Los Angeles Auto Show. An exec from Subaru's parent company said at the time that "the next three-row from Subaru will be the biggest Subaru vehicle ever." That's for sure: The wheelbase is 117.7 inches and the overall vehicle measures 204.7 inches - a bit longer than a Chevy Tahoe. Subaru may well debut the production Ascent at the New York Auto Show in April. In the meantime, check out the spy shots above. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. View 14 Photos Related Video: