1999 Nissan Maxima Gle Sedan 4-door 3.0l 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.

Renault plans to sail — literally, sail — on new class of cargo ship

Going green on the ocean may take another step toward reality in about two years, when Renault is expected to load automobiles aboard wind-powered ships for delivery around the world. The partnership between the car maker and Neoline, a French-based company, aims to reduce Renault’s global carbon footprint by eliminating many of the emissions from traditional fuel-powered cargo ships. Neoline officials said that, when propelled solely by the wind, their sailing ships' total emissions drop by as much as 90 percent. The roll-on-roll-off ships will use solid sails that are 50 meters tall. The company says it will start testing the program in 2024 by transporting vehicles to North America and other locales from Saint-Nazaire, in western France. Renault has pledged to achieve zero carbon in Europe by 2030 and worldwide by 2050. Renault, now part of an alliance with Nissan and Mitsubishi, hasnÂ’t sold cars in the U.S. market under its own brand name since 1987. A U.S. return as been considered for years, and the partners are now in talks that could reshape the alliance. The shipper's intent to deliver vehicles to North America is an intriguing wrinkle to those talks. The firm says that about 300 to 400 vehicles can be shipped on each Neoline vessel, although the loading will take longer that it would using a traditional cargo ship. A demonstration vessel shown was 446 feet in total length and had more than 45,000 square feet of sail. The partnership between Renault and Neoline was first announced in 2018.   Green Mitsubishi Nissan Green Culture

NHTSA investigating Bosch Power Xpress 240V EV chargers for fire risk

*UPDATED with Bosch's comment. Let's stamp out the flames of suspicion right up front. A new National Highway Traffic Safety Administration (NHTSA) investigation, while involving a 2013 Nissan Leaf and some smoke, is not about another EV fire. Not directly, anyway. "Nissan has determined by pictures that the car was not to blame for the incident" – NHTSA complaint This time, the subject of the NHTSA's lens is the Bosch Power Xpress 240V charging unit. NHTSA wants to know if an overheating charging cord caused smoke (NHTSA says there was no actual fire) in a Leaf owner's garage last fall. NHTSA says it will investigate, "to evaluate the scope, frequency, and consequence of the alleged defect." Up to 50 of the charging units could be involved, and NHTSA decided to act based on a single customer complaint that was filed in August 2013. The investigation opened April 15, so it will likely be a while before we know any more concrete details. For now, you can read the official details of the investigation and the original complaint - which says, "Nissan has determined by pictures that the car was not to blame for the incident. They are blaming the charging station for the failure. They have denied any warranty coverage. The burden of the bill has been placed with the customer" – below. Nissan's senior manager of corporate communications, Brian Brockman, sent AutoblogGreen a statement that says Nissan will work with NHTSA and Bosch and points out that, "This inquiry is focused on the electric vehicle charger and is directed at the charger supplier, Bosch." Requests for comment from Bosch were not returned, but we will update this post when we hear back. Bosch spokesperson Cheryl Kilborn told AutoblogGreen that, "Bosch is reviewing the filing and will work cooperatively with NHTSA as we seek to identify the root cause." INVESTIGATION Subject : Bosch EV charging cord overheating Date Investigation Opened: APR 15, 2014 Date Investigation Closed: Open NHTSA Action Number: PE14011 Component(s): ELECTRICAL SYSTEM All Products Associated with this Investigation close Equipment Brand NamePart No.