Sport German - We Finance on 2040-cars

Auto blog

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.

Automakers are getting nervous about Europe's economy

Carmakers BMW and Stellantis on Thursday expressed concerns about Europe's economic outlook, joining a chorus of retailers and others in warning of waning consumer confidence on the continent and hitting their shares. "Obviously the macro(-economic situation) in Europe is more challenging, which gives me pause, personally," Stellantis chief financial officer Richard Palmer said on a conference call with analysts. "If there was anywhere where I was more concerned, it would be Europe than anywhere else really based on the macro." This follows a dire assessment of consumer sentiment in Europe from the likes of consumer goods company Unilever and news of lower spending by Europeans from Amazon. Like other major auto companies, Stellantis and BMW have been hit by supply chain disruptions stemming from the global coronavirus pandemic that have curtailed car production. They have also benefited from strong consumer demand amid low vehicle supply, allowing them to raise prices and keep them high even as the semiconductor shortage shows signs of easing. BMW posted a 35.3% jump in third-quarter revenue despite a small drop in vehicle sales. Stellantis said its revenue rose 29% on the back of a 13% increase in vehicle sales as more semiconductors became available. The concern among analysts has been that demand may falter, just as carmakers get their hands on the supplies they need, undermining pricing and hurting profits. But this week Ferrari said it was confident about its prospects for this year and 2023 as demand for its luxury cars, as well its pricing power, remained strong. Both BMW and Stellantis said on Thursday they had vehicle order books that stretched into the second quarter of 2023. But BMW's chief financial officer Nicolas Peter said high inflation and rising interest rates could hit buyers' wallets. "This is causing conditions for consumers to deteriorate, which will affect their behaviour in the coming months," he said. "We therefore continue to expect our higher-than-average order books to normalise, especially in Europe." He added customers had been unhappy about the wait for new cars, so "a slight reduction (in orders) would not be negative." Palmer said Stellantis was "ready for any softness in demand" but in the short term had been affected by a shortage of drivers to deliver its cars to dealers. "At the moment, we can't build enough cars," he said.

Watch Atieva's electric van outrun a BMW i8 and Dodge Viper

A little while back, automotive startup Atieva drag raced its electric van, called Edna, against a Tesla Model S and a Ferrari California in order to compare its performance against known and revered mechanical athletes. Again, the Silicon Valley-based company is putting its prototype up against electrified and conventionally powered performance vehicles on the drag strip. Last time around, Edna, the Mercedes-Benz Vito van equipped with a 900-horsepower, all-wheel-drive powertrain, bested both of its foes. In that showcase, Edna was hitting 60 mph in a little over three seconds. Comparatively, BMW lists the i8's 0-60 time at 4.2 seconds, though Road & Track clocked it at 3.8 seconds, with a quarter-mile time of 12.3 seconds. The Viper does 0-60 in 3.4 seconds. Before you even watch the video above, you can imagine how it will end, as the retuned Atieva Edna rips 0-60 mph in 2.94 seconds. Atieva clocked the quarter mile at 11.3 seconds at 117 mph. It's worth noting that driver skill can have a lot to do with a car's straight-line performance. We've witnessed Viper's elapsing the quarter mile in well under 12 seconds, which means it should be quicker in this test than the i8, if not the Edna. Still, the performance showcased in the video is exceptional. To improve Edna's stats, Atieva says it has used testing data to fine tune its AC induction motors at higher speeds once it got low-speed performance locked in. After testing in the hot California sun, including the race you see above, Atieva drove Edna 90 miles home with range to spare. As for production plans, Atieva will put this powertrain into a sedan slated for sale in 2018. In the meantime, the company will keep testing and tuning its working prototype, and has even invited the public to put their cars up against Edna in future sessions. Related Video: Related Gallery 2015 BMW i8 in Petoskey, MI News Source: Atieva, YouTube: Atieva via Electrek Green Motorsports BMW Dodge Automakers Electric Future Vehicles Videos drag race atieva