2014 Nissan Altima 2.5 Sv on 2040-cars

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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.

Google's new Android Autos OS unveiled, will be in cars this year [w/video]

Connected cars are coming en-masse. We know this much. How, though, remains something of an open question, especially as two of the world's largest tech companies are preparing to battle for control of your car's dashboard. On the one hand, we have Apple and its CarPlay system. And now, we know what Google has been working on with Auto Link.
Its new name is Android Auto, and yes, it's based off the Android architecture that is the primary challenger to Apple's iOS mobile operating system. Announced at Google's I/O conference today, Android Auto functions similarly to CarPlay - owners will need to plug their smartphones into their cars to access the full breadth of capability.
In Android Auto's case, that means a wealth of voice controls to limit distracted driving. Google's marquee apps will be available when the interface arrives in production models later this year, including Google Play Music, Google Maps and voice-activated texting and text playback. Meanwhile, developers will be able to begin designing custom apps for the new system via an upcoming software development kit.

Why a Renault-FCA merger could be good news for Nissan, Mitsubishi

TOKYO — Nissan's advanced technologies including platforms and electric powertrains could give it leverage in a merger involving Renault and Fiat Chrysler, thanks to a royalty system it has with the former, two people with knowledge of the matter said. A merged Renault-Fiat Chrysler could face an extra hurdle each time it uses technology developed by Nissan or Mitsubishi Motors, while the two Japanese automakers stand to gain a client in Fiat Chrysler (FCA), one of the people said. Both sources declined to be identified because of the sensitivity of the matter. Nissan's technology, particularly in electrification and emissions reduction, could give it some sway in the $35 billion potential tie-up between Renault and FCA, even as its stake in the newly formed company would be diluted. Currently Renault SA pays less for technology developed by Nissan than the Japanese automaker pays for French technology, a third person said. This has long been a sticking point for Nissan, and an area where Nissan could seek more favorable terms. "Whenever Nissan transfers platform, powertrain or other technology to Renault, there is a margin or royalty which Renault has to pay for use of that tech," one of the people said. "In that sense, FCA, if everything went well, would become another 'client' of ours and that's good. More business for us." A Nissan spokesman declined to comment on its royalty system. The potential Renault-FCA deal has complicated the Japanese automaker's already uneasy alliance with Renault. A further deal with Fiat Chrysler looks likely at least in the near term to weaken Nissan's influence in the 20-year-old partnership. Renault owns a 43.4% stake in Nissan and is its top shareholder. Nissan holds a 15% non-voting stake in Renault and would see that diluted to 7.5% after the FCA deal, albeit with voting rights. The imbalance between the two has long rankled Nissan, which is by far the larger company. Alliance imbalance Renault had previously angled for a merger with Nissan but has been rebuffed by CEO Hiroto Saikawa. Securing benefits from the merger deal will be important for Saikawa, who is grappling with poor financial performance while he struggles to right the company after the ouster of former chairman Carlos Ghosn last year.