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Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Recharge Wrap-up: Nissan, Tesla report CO2 savings, rare earth metal recycling simplified

A new process simplifies the recycling of rare earth metals. While the strong magnetic properties of metals like neodymium and dysprosium make them useful in electric vehicles traction motors, there are concerns about their availability and the environmental costs of mining them. Researchers at University of Pennsylvania have developed an easier method to recycle those metals that is less energy intensive and more cost effective. "We have designed a way to separate the two metals by selectively dissolving the neodymium in a solution and leaving behind the dysprosium as a solid," says Justin Bogart, a graduate student working on the project. "This quick and easy method has allowed us to separate equal mixtures of the metals into samples that are 95 percent pure." Now the team is working to improve that level of purity. Read more from University of Pennsylvania. Nissan Leaf drivers in Europe have saved over 55,000 tons of CO2 emissions. Worldwide, the 178,074 Leafs sold account for the prevention of over 293,000 tons of CO2 emissions so far. That equates that to the neutralizing effect of 19 million trees. Besides the positive effects on environmental and noise pollution that switching to electric mobility provides, Nissan also points out that it's good business, too. EVs like the Nissan Leaf and e-NV200 cost about 40 percent less than combustion vehicles to maintain, and the cost of electricity is substantially lower than that of fossil fuels. Additionally, Nissan has published a video of the Leaf touring Bristol to celebrate the greening of European cities with the help of electric vehicles. See the video, and read more from Nissan. Tesla customers have driven a cumulative 1 billion miles. Together, nearly 75,000 Model S drivers have prevented more than 570,000 tons of CO2 emissions worldwide. To put that in perspective, a billion miles is the equivalent of 4,186 trips to the moon, and almost 40,000 trips around the Earth. In the UK, where the Model S is celebrating its one-year anniversary, drivers have already accumulated 6.6 million miles. Tesla is celebrating its milestone with the Next Billion Miles Tour, hosting hands-on events and test drives in 80 cities across North America, Europe and Asia. See the video from Tesla above, visit the One Billion Miles microsite and read more in the press release below.

Nissan Leaf's No Charge To Charge now available in Boston

Depending on where you buy your all-electric Nissan Leaf, there's a pretty sweet deal attached. In some parts of the US – most recently, now also in Boston, MA – new Leafs come with the "No Charge To Charge" program, which allows drivers to recharge their batteries at some public charging stations for free. Today's announcement that Boston will join the program brings the total number to 17 area, and Nissan has said it will eventually expand No Charge To Charge to at least 25 markets in the US by the end of the year. As Nissan representatives explained when the program was first announced at the 2014 New York Auto Show, there are limits on the program. Without paying, you can plug your new Leaf into a public CHAdeMO DC fast charger for a maximum of 30 minutes and just one hour at Level 2 stations. You can find a list of No Charge stations from companies like ChargePoint, Blink, AeroVironment, and NRG eVgo here. Related Video: CALLING ALL BOSTONIANS: NISSAN'S "NO CHARGE TO CHARGE" PROGRAM ARRIVES IN BEAN TOWN BOSTON (July 6, 2015) – Nissan is launching its "No Charge to Charge" promotion for Boston-area Nissan LEAF buyers, providing two years complimentary public charging with the purchase of the all-electric car from LEAF-certified dealers in the Boston market. "Nissan LEAF is an attractive option for Boston car buyers because it is fun to drive and offers significantly lower operating costs when compared to a gas-powered car," said Andrew Speaker, director, Electric Vehicle (EV) Sales & Marketing, Nissan. "EV charging infrastructure continues to grow in Boston, and access to free public charging for new LEAF buyers helps make owning an all-electric vehicle even more cost-effective and convenient." "No Charge to Charge" launches at Nissan LEAF dealers in the Boston market on July 1. The promotion includes access to fast chargers that can charge a LEAF battery pack from empty to 80 percent in about 30 minutes, as well as level 2 (240V) chargers spread throughout the Boston area. Nissan now offers "No Charge to Charge" in 17 U.S. markets, including San Francisco, Los Angeles, Sacramento, San Diego, Fresno, Seattle, Portland (Oregon), Chicago, Atlanta, Indianapolis, Nashville, Phoenix, Dallas-Ft. Worth, Houston, Denver and Washington, D.C. Nissan plans to offer the "No Charge to Charge" program at LEAF dealers in a total of at least 25 U.S. markets later this year.