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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.

Nissan expands regional airbag recall to 45k Sentras [UPDATE]

UPDATE: Nissan's official statement about this recall expansion has been added below. Nissan is expanding its regional Takata airbag inflator recall for the passenger side of an estimated 45,000 Sentras from the 2004-2006 model years in high-humidity states. The National Highway Traffic Safety Administration has not yet published the specifics of the broadened campaign, but Nissan spokesperson Steve Yaeger told Autoblog that the company submitted a Defect Incident Report to the agency yesterday, April 16. According to Reuters, the expansion followed a case in March where a women in Louisiana was injured by a ruptured airbag in a 2006 Sentra. Yaeger clarified this to Autoblog via email by stating, "This action is not in response to lawsuit filed yesterday. [The] recall was initiated before that came to light." As required under the law, affected owners should be notified within the next 60 days, he indicated. Nissan was already recalling nearly 700,000 vehicles for the faulty inflators. While millions of owners from multiple automakers were affected by the potentially dangerous parts last year, the safety campaigns haven't quite finished yet. Honda expanded its own nationwide campaign to add 100,000 more units in March. Related Video: Nissan Statement Based on new field information and in consultation with NHTSA, Nissan Group is taking further action to expand the previously announced Takata Inflator Regional Recall to include additional Model Year 2004-2006 Nissan Sentra vehicles in the affected areas of the U.S. and its territories. If you receive a recall letter please take your vehicle to a Nissan dealership to have the recall work performed at no cost. The company urges anyone who owns any vehicle that is potentially affected by the Takata's recalls to enter their vehicle's identification number (VIN) on NHTSA's site https://vinrcl.safercar.gov/vin/ or Nissan USA and Infiniti USA web sites. The web sites will be updated with newly affected vehicles in approximately two weeks. Nissan and Infiniti are committed to a high level of customer safety, service and satisfaction and are working with NHTSA, Takata and our dealers to promptly address this issue.

For next Nissan CEO, priority is profit before Renault partnership

The next head of Nissan Motor Co will need to prioritize a recovery in profits at the troubled Japanese firm ahead of trying to fix its relationship with top shareholder Renault SA, executives and analysts say. Reviving earnings would strengthen the carmaker’s hand in negotiations with its French partner, and is something Renault itself would welcome as the owner of a 43.4% stake in Nissan. JapanÂ’s second-largest automaker said on Monday CEO Hiroto Saikawa would step down on Sept. 16 after he admitted to being overpaid in breach of company rules. ItÂ’s another heavy blow for Nissan, which is already reeling from the arrest of former chairman Carlos Ghosn last year and a subsequent plunge in earnings. Its stock is down 20% this year. For SaikawaÂ’s yet-to-be-named replacement, the top priority will be lifting profits from a more than decade low. Earnings have been undercut by years of heavy discounts and low-margin sales to rental firms that have cheapened NissanÂ’s brand image. Renault, which has unsuccessfully sought a full-blown merger with its larger partner, is likely to give the Japanese firm time to focus on its turnaround, a Nissan executive said. “It goes without saying recovery is the biggest priority,” the executive said, declining to be identified because the information is not public. “We have RenaultÂ’s understanding on that.” Tensions in the Nissan-Renault partnership worsened after GhosnÂ’s arrest. He is awaiting trial in Tokyo on financial misconduct charges that he denies. The strain has sparked investor concern about the future of the Franco-Japanese automaking alliance at a time when car companies desperately need scale to keep up with sweeping technological changes like electric vehicles and ride-hailing. Nissan executives have long complained about their unequal partnership with Renault, which saved the Japanese firm from bankruptcy in 1999. Nissan holds a 15% stake in Renault, but without voting rights. Tokyo is also seen as being uneasy about the French governmentÂ’s 15% holding in Renault, which makes Paris an indirect shareholder in Nissan. “Profitability is likely to remain under pressure and it (Nissan) is unlikely to promptly reach an agreement with Renault over the future shape of the alliance,” analysts at Standard & PoorÂ’s said in a note. Tensions worsened when Renault tried to in vain to merge with Nissan and then Fiat Chrysler.