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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: BMW to test autonomous cars, Korea bans sales of BMW, Nissan, Porsche models

BMW will test autonomous cars on public roads by the second half of 2017. The German automaker, with partners Mobileye and Intel, will operate a fleet of 40 self-driving vehicles using a "scalable architecture" that will be made available to other automakers. The partners plan to offer products ranging from key components to "a complete end-to-end solution" for autonomous driving. Since parting ways with Tesla, Mobileye also recently announced it would provide its technology to Lucid Motors. For BMW, it all leads up to its fully autonomous iNext model slated for introduction in 2021. See the video above, and read more in the press release from Intel. South Korea has banned the sale of certain models from BMW, Nissan, and Porsche over emissions cheating. Following an investigation, regulators determined emissions testing documents to be falsified. The country's Ministry of Environment has fined the three automakers a total of $5.9 million, and revoked the certification of 4,523 vehicles across banned 10 models. Six of the models were still on sale, while the other four have been discontinued. Read more from Automotive News Europe. China's prices for the Cadillac CT6 Plug-in are significantly higher than those announced for the US. The plug-in hybrid version of the luxury sedan recently went on sale with the two variants priced at RMB 558,800 and RMB 658,800. At the time of this writing, that's $80,420 and $94,812. Cadillac announced it would bring the CT6 Plug-In Í– which is built in China – to the US in the spring of 2017, starting at $76,090 before federal and local tax incentives. Hybrid Cars points out that China's own generous incentives could help to make it more competitive. The offering of a charger with free installation as well as an eight-year warranty on the electric powertrain should help, too. Read more at Hybrid Cars. A Connecticut court has ruled in favor of Tesla's gallery showroom in Greenwich. Last May, the Connecticut Automotive Retailers Association brought the suit to block the showroom on Greenwich Avenue, which has now been dismissed by the Connecticut Superior Court. Tesla cannot offer test drives, sell cars, or operate a Supercharger at the location, but it can sell other branded items and educate the public about its vehicles. It's possible that the issue of Tesla's direct sales model could come up again this year in Connecticut state legislature. Read more at Teslarati .

Nissan will expand free* charging incentive to 25 Leaf markets

Nissan has proof that giving away a bit of electricity makes buying a new Leaf all the more enticing. Thanks to a deal that offers free charging to some Leaf owners in Texas, one dealer there claims his Leaf sales have tripled. We don't see national sales climbing quite that high starting July 1 2014, but an announcement made today at the New York Auto Show will likely give the EV a boost. New Leaf buyers will get to charge for free at public chargers for two years. Within limits: a max of 30 minutes at CHAdeMO and an hour at Level 2 stations. Nissan will expand its "No Charge to Charge" promotion to at least 25 markets across the US. The deal means that new Leaf buyers will get to charge for free at public chargers that accept the new EZ-Charge card, within limits. That means a maximum of 30 minutes at CHAdeMO DC fast chargers and just one hour at Level 2 stations, Brendan Jones, director of Nissan EV infrastructure strategy and development, told AutoblogGreen. This should be plenty of time, Jones said, since the average Leaf driver comes to a CHAdeMO station with 35-40 percent state-of-charge on the battery and the average time they stay is around 16-17 minutes. A half hour is fine at a fast charger, since the battery will get to 80 percent full within that time, but we're less impressed with the one-hour limit at a Level 2 station, since that will only put maybe 20 miles into the battery. The EZ-Charge card is compatible with four of "the leading EV charging networks," which here means ChargePoint, Blink, AeroVironment and NRG eVgo. Nissan says the 25 markets make up over 80 percent of all the US Leaf sales. Anyone who buys a new Leaf in one of the specified markets - or bought one on or after April 1 of this year - will get the free-to-use EZ-Charge card (others can still get the card, which means only carrying one charger company fob instead of four). The promotion starts July 1 in 10 markets (San Francisco, Sacramento, San Diego, Seattle, Portland, Nashville, Phoenix, Dallas-Fort Worth, Houston and Washington, DC) and then expands to the next 15 by the end of June, 2015. Nissan would not specify which markets these will be, but they will be where the Leaf is selling well and there are DC fast chargers. That means, we suspect, places like Chicago, St. Louis, Philadelphia and Atlanta.