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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.

How Renault, Fiat Chrysler, and yes, Nissan, could save through sharing

If French automaker Renault green-lights a proposed merger with Fiat Chrysler Automobiles, the companies almost immediately could begin saving money by consolidating components and basic structures on many of their most popular vehicles, an industry analyst said on Tuesday. The synergies could multiply if they invite Japanese automaker Nissan, currently Renault's alliance partner, to join the merger, according to a former Renault and Nissan executive. Renault and Italian-American rival Fiat Chrysler Automobiles are in talks to tackle the costs of far-reaching technological and regulatory changes by creating the world's third-biggest automaker. A Renault-Fiat Chrysler combination "would mean a greater sharing of parts (which) could really boost the profitability of Fiat Chrysler's smaller vehicles," said Sam Fiorani, vice president, AutoForecast Solutions. Building similar models on a common vehicle architecture, Fiorani said, "would give both companies a lot more freedom in manufacturing. They could mix brands and vehicle sizes on the same assembly line, switch vehicles between plants to balance production, and even shift production from one country to another, depending on changes in demand, tariffs or other considerations." Fiorani said Fiat Chrysler could benefit from sharing the French automaker's expertise in electric vehicles and powertrains, where Renault and Nissan have jointly invested more than $5 billion. These are areas in which Fiat Chrysler has little in the way of components or intellectual property. Another sector that is ripe for consolidation is light commercial vehicles, where Renault and Fiat Chrysler could build a variety of vans in several sizes on common platforms that could be assembled and sold in global markets. Ford Motor Co and Volkswagen AG began their alliance discussions a year ago by focusing on potential collaboration in light commercial vehicles. Getting Nissan's blessing Fiorani said Renault's CMF architecture, which was jointly developed with Nissan and underpins many of Renault's passenger cars and crossovers, could be used by Fiat Chrysler on a wide variety of vehicles. As an example, he said the CMF could provide a new single foundation for at least five Jeep models, including the Renegade, Compass and Cherokee, which now are based on four different platforms.

Nissan and Renault shelve merger plans, will repair their alliance

Renault and Nissan have shelved plans to push towards the full merger former leader Carlos Ghosn craved and will instead fix their troubled alliance to try to recover from the coronavirus pandemic, five senior sources told Reuters. Nissan has long resisted Renault's proposals for a full-blown merger as executives felt the French carmaker was not paying its fair share for the engineering work it did in Japan, sowing discord that some feared could wreck the partnership. Now, with carmakers around the world reeling from the pandemic, the partners are planning to overhaul an alliance that largely failed to convert its global scale into a competitive advantage beyond the joint procurement of parts. Both struggling carmakers are set to announce mid-term restructuring plans this week that will serve as a peace treaty designed to resolve the long-standing tensions, five people familiar with the overhaul told Reuters. "After the rain, the earth hardens," said one senior Nissan source, citing a popular Japanese proverb that means relationships become stronger after a period of strife. All five sources within the alliance, which also includes Mitsubishi, declined to be named because they are not authorized to speak with media. Nissan and Renault are each planning substantial restructuring and cost cuts that could affect tens of thousands of jobs, with the Japanese company to announce its measures on May 28 and its French partner likely to follow the next day. Before that, Mitsubishi, Nissan and Renault are holding a joint news conference on May 27 during which they are expected to outline the philosophy behind their new "leader-follower" approach to the alliance. The sources said the companies were unlikely to disclose many details at the events this week of how the new approach will be used to share costs as the companies were still working on specific projects. However, the crisis at both carmakers has accelerated efforts to resolve the disagreements that have stymied collaboration and cost-sharing in technology and product development for five years, the sources said. Mitsubishi, Nissan and Renault all declined to comment officially about alliance plans. 'Leader-follower' The alliance has steadily ramped up output over the years, delivering over 10 million vehicles for the first time in 2017, the first full year after Mitsubishi joined the partnership.