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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.

Watch Nissan's autonomous Leaf in action

Getting its semi-autonomous Leaf legalized in Japan was just the first step. Now, Nissan is giving demonstrations of what its fully autonomous car is capable of at this year's Combined Exhibition of Advanced Technologies (CEATEC) show - Japan's equivalent to America's Consumer Electronics Show. To show off the possibilities of its technologies, Nissan had an oval track set up at the show giving rides in an autonomous Leaf to the media. Even Nissan CEO Carlos Ghosn and Toyota CEO Akio Toyodo caught a ride.
Nissan has since released a couple videos of its CEATEC demos, with one designed to look like a news report. In this video, you can watch the car go around the track and navigate intersections and road hazards. The second video shows Ghosn riding in the car, and he hints that Nissan's goal of having an autonomous vehicle in production by 2020 might be more of a worst-case scenario. Watch both videos and read through Nissan's official press release below.

Recharge Wrap-up: BMW i8 markups declining, Nissan offering discounted Leaf lease buyouts

Zipcar has published the results of an independent study on "Urban Boomers." KRC Research surveyed city-dwelling, healthy adults aged 50 to 69, and found that they are fond of technology and are more active – but drive less – after moving to the city. Many still feel car ownership is important, and often don't get rid of a car they already own, but they find alternative forms of transportation important, too. Even though it is often thought of as a bigger draw for millenials, Zipcar feels that these findings indicate that Urban Boomers are an important demographic for carsharing companies. See the results of the study in the slideshow from Zipcar. Nissan is offering lease buyout credits of up to $5,000 for its Leaf EV. Depending on the region, 2012 and 2013 models get a Leaf Gross Payoff discount of up to $5,000, with 2011 models garnering up to $1,500 off. Some dealers may also offer an additional $1,500 discount. It's possible that Nissan wants to encourage lessees to purchase their Leafs after residual values of the car dropped by about six percent in May. Some potential long-term owners could also be concerned over battery life, or be tempted by the updated Leaf slated for the 2017 model year. Read more at Green Car Reports. Dealership markups for the BMW i8 are dwindling. Actual costs of the attractive plug-in hybrid are nearing sticker prices after high demand and short supply led many dealers to exact a higher price for the car. BMW recently announced it would double production of the i8 to help meet demand, which could be behind the declining markups. The i8 has a base MSRP of $136,500, plus $950 in destination fees. Read more at Green Car Reports. Featured Gallery 2015 BMW i8 in Petoskey, MI Related Gallery 2013 Nissan Leaf: First Drive View 15 Photos News Source: Slideshare, Green Car Reports, Green Car Reports via ZipcarImage Credit: Copyright 2015 AOL Green BMW Nissan Green Automakers Transportation Alternatives Ownership Electric recharge wrapup