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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.

Ghosn predicts autonomous cars on the roads by 2018, if laws allow

Things appear to be going well inside Nissan's autonomous vehicle development program. Until now, the automaker believed that self-driving cars would be ready for major markets like the US by 2020. However, Renault-Nissan CEO Carlos Ghosn is now speeding up that prediction to 2018 in some places, assuming that local laws are ready to accept the computer-controlled vehicles.
"The problem isn't technology, it's legislation, and the whole question of responsibility that goes with these cars moving around," said Ghosn in a speech in France recorded by Reuters. He predicted that the first sales could begin in France, Japan and the US by 2018 and expand elsewhere in 2020.
The alliance has been among the forefront of automakers working on self-driving cars. Nissan has an autonomous Leaf (pictured above) test car that is licensed to drive on Japanese roads. Renault showed off an version of its Zoe EV earlier this year called the Next Two, that could pilot itself at speeds up to 18 miles per hour, and that the company predicted would be ready by 2020.

Nissan and Renault chief engineers meeting to revive joint projects

PARIS — Renault's engineering boss will meet his counterpart at Nissan in Japan this week, two sources close to Renault said, as the carmakers seek to revive projects crucial to an alliance left reeling by the Carlos Ghosn affair. The Franco-Japanese alliance is wrestling with the fallout of the ouster and arrest of Ghosn, the architect of the partnership who now says it is at risk of collapse. Analysts say that in order to turn investor sentiment around, the firms need to make good on cost-saving joint engineering projects that have slowed since Ghosn's departure. According to the two sources, Gilles Le Borgne, who was hired on Jan. 6 from rival automaker PSA, will meet Nissan's Tsuyoshi Yamaguchi, the Nissan executive in charge of delivering the joint engineering projects. Renault did not respond to a request for comment on Le Borgne's meetings. Renault-Nissan's cost-saving alliance is vital to both companies as the car industry battles a slowdown and huge investments in cleaner vehicles and automated driving. "The alliance has taken a hit, but the alliance engineering team is still there," said a third source, who is close to the alliance. "You cannot, from one day to the next, stop something that's been embedded so deeply." Japanese prosecutors arrested Ghosn — who was at the time the head of the carmakers' alliance -- in November 2018 and accused him of financial misconduct. Ghosn slipped out of Japan and fled at the end of December to Lebanon. He says the charges were fabricated to force him out of an alliance in which the Japanese side no longer trusted its French partners. Renault Chairman Jean-Dominique Senard has said both sides are determined to make the partnership succeed, with the joint projects a major focus. Those projects will be on the agenda when the board of the alliance, which also includes Japanese carmaker Mitsubishi <7211.T>, holds a regular meeting in Japan on Jan. 30. One area of focus will be hybrid power systems, a field where, analysts say, the alliance has not effectively pooled its research and development efforts. Each of the three members of the alliance has developed their own systems. "That's been among the sources of the friction," said the third source close to the alliance.