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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.

Environmental group accuses BMW, JLR of link to deforestation in Paraguay

ASUNCION, Paraguay — Environmental group Earthsight said on Wednesday it has linked some of Europe's largest carmakers to the deforestation of the Chaco, a dry forest region of Paraguay home to jaguars and one of the last uncontacted indigenous groups in the world. The group said in a report that livestock companies have illegally logged lands of the Ayoreo Totobiegosode indigenous ethnic group, some of whose members live in voluntary isolation. The livestock skin is used in leather upholstery of luxury vehicles sold by high-end European auto brands including BMW, Jaguar and Land Rover, the group said. UK-based Earthsight said it had made covert visits to tanneries that bragged about supplying the raw material to the luxury car brands. "BMW is using hides sourced from two slaughterhouses processing cows from ranches responsible for illegal [logging] in the Ayoreo Totobiegosode's forests. Jaguar Land Rover didn't dispute sourcing from a Paraguayan tannery that processes hides from another slaughterhouse doing the same," the report said. Jaguar Land Rover said in a statement to Reuters it had found no evidence to verify Earthsight's claims. It said its European suppliers assured sustainability. "We continue  our drive for further transparency and, in this case, the leather supplier in Europe verifies with each raw material supplier that no rural property that directly supplies it is involved in illegal deforestation," the automaker said. BMW did not respond to a request for comment on the Earthsight investigation. Paraguay exports about 50,000 tons of wet-blue leather (tanned, but not dried, dyed or finished) a year, and almost two-thirds of those shipments are bound for Europe, according to the report. Automakers say that leather is a byproduct of the far larger meat industry and high-end cars constitute a comparatively small market niche. But indigenous leaders say deforestation driven by growth in beef and leather exports is encroaching on their territory and destroying their way of life. "As deforestation advances with extensive cattle ranching, they are being imprisoned, they are disappearing," Taguide Picanerai, a spokesman for the Ayoreo community in the Alto Paraguay department, northwest of Asuncion, told Reuters. The region is home to some of the world's highest rates of deforestation, Earthsight said.   Green BMW Jaguar Land Rover

BMW could add all-electric Mini, X3 SUV

BMW's Mini sub-brand will add a battery-electric variant as the company looks to meet stricter emissions mandates around the world, according to an interview Bloomberg News conducted with CEO Harald Krueger. BMW is also planning an all-electric version of its X3 SUV and may start greening up models as large as its 7 Series sedan, though that prospect is far cloudier. The all-electric Mini will be available to the public as soon as 2019, while the battery-electric X3 SUV will likely start sales the following year. BMW didn't offer specifics about how much those models would cost or far they will be able to travel on a full electric charge, with Krueger only saying single-charge ranges would be "competitive" with other all-electric models. BMW this summer upgraded the battery in its i3 electric vehicle and boosted its single-charge range by about 40 percent to 114 miles. As for demand for BMW's i sub-brand vehicles, US sales of the i3 through September fell 27 percent to almost 5,800 vehicles, while sales of the i8 plug-in hybrid are down 19 percent to about 1,100 units, BMW said on Monday. Meanwhile, word got out earlier this year that BMW may dedicate the Rocketman concept hatchback as Mini's entrant to the electric-vehicle sector. BMW actually used a Mini as its first electric testing vehicle. The Mini E was produced in 2009 and 2010 before giving way to the BMW ActiveE, which was actually a converted 1-Series vehicle. Eventually, BMW started producing the i3. Related Video: Featured Gallery Mini Rocketman Concept View 25 Photos News Source: Bloomberg News Green BMW MINI SUV Electric