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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.

What to expect from the Japanese trial of Nissan and Greg Kelly

TOKYO — The criminal trial against Japanese automaker Nissan and its former executive Greg Kelly will open in Tokyo District Court on Tuesday. ItÂ’s the latest chapter in the unfolding scandal of Carlos Ghosn, a superstar at Nissan until he and Kelly were arrested in late 2018. Five questions and answers about the trial: Q: WHAT ARE THE ALLEGATIONS? A: The charges center around KellyÂ’s role in alleged under-reporting of GhosnÂ’s future compensation by about 9 billion yen ($85 million), a violation of financial laws. Kelly says he is innocent. Nissan, which is also similarly charged, has already acknowledged guilt, made corrections to the compensation documents submitted to the authorities, and has started paying a 2.4 billion yen ($22.6 million) fine. Q: WHAT HAPPENS TO GHOSN? A: Probably nothing. He skipped bail late last year and is now in Lebanon, which has no extradition treaty with Japan. Two Americans, Michael Taylor and his son Peter Taylor are being held in Massachusetts without bail, suspected of having helped Ghosn escape by hiding in a box on a private jet. A U.S. judge recently approved their extradition to Japan. The case is now before the U.S. State Department. Q: HOW DO CRIMINAL TRIALS PROCEED IN JAPAN? A: The trial, before a panel of three judges, is expected to take about a year. There is no jury. Juries are selected only for extremely serious cases in Japan, such as murder. In principle, there are no plea bargains although backroom deals are made all the time. Closed pre-trial sessions are held ahead of the trialÂ’s opening, often for months before the real trial begins. Japan's legal system has come under fire from both within and outside the country as “hostage justice” because suspects often are held for months and interrogated without a lawyer present, often leading to false confessions, according to critics. Q: WHAT ARE KELLYÂ’S CHANCES? A: More than 99% of criminal trials in Japan result in a conviction. Japanese Justice Minister Masako Mori, in an online presentation in English hosted by the Japanese Embassy in the U.S., argued the conviction rate is so high because Japan prosecutes only about a third of the cases that come up, choosing only those that “result in guilty verdicts.” She insisted there is a “presumption of innocence.” She declined comment on KellyÂ’s case.

Before next-gen arrives, Nissan Leaf may get 120-mile battery

As Nissan prepares to unveil its next-generation Leaf electric vehicle, the Japanese automaker may come out with an "interim" version of sorts that could spur lagging sales of the model in the US. So says Automotive News, which reports from a person familiar with the process who wasn't identified that Nissan soon may start selling a Leaf with a 30-kilowatt-hour battery, up from the current 24 kWh version. It could arrive as soon as next month. Indeed, Nissan's temporary solution may be to provide range-hungry drivers with a single-charge range of 100 to 120 miles. Sure, that doesn't quite match up with the distance a gas-powered vehicle can go on a full tank, but it would be an notable upgrade from the current single-charge range of 84 miles for the Leaf. Word first got out about the Leaf possibly adding a 30-kWh battery in late May. Nissan's contending with falling Leaf sales in the US that may be caused by both the expiration of some plug-in vehicle credits as well as the prospect of a glut of used Leafs back on the market as three-year leases run out. Through the first half of the year, Nissan sold 9,816 Leaf vehicles in the US, a 23-percent drop from a year ago. Nissan CEO Carlos Ghosn said in a June 23 shareholders meeting that the company can improve battery technology enough to put an electric vehicle's single-charge range on par with the distance a conventional car can go on a full tank of gas. Related Videos: