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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.

Recharge Wrap-up: E15 could help smog woes, MPG average at all-time high

A new study shows that using an E15 blend instead of regular gasoline would reduce smog in Chicago. Increasing the availability of the 15-percent ethanol blend could help reduce carcinogenic air pollution and improve air quality, particularly on the city's South Side. The study found that E15 reduces the risk of cancer by 6.6 percent. It also reduces greenhouse gas emissions 1.5 percent compared to a 10-percent ethanol blend. Read more at Domestic Fuel. Fairmont Beijing is offering hotel guests a chance to experience BMW's i cars. For the next three months, guests needing airport transfers will be picked up in one of the German automakers electric vehicles. Also, those who choose the hotel's "Passion Package," which includes transportation in one of the cars or on a BMW bike, and a private guided tour of the 789 Arts District and the Peking opera house as well as tickets to an opera performance. Learn more in the press release below. Formula E will host motor shows at the circuits during its race weekends. Visitors will learn about the technology behind the all-electric race series and the racecars, including the safety and performance aspects. The goal of the four-day shows is not only to entertain and educate people, but also to generate interest in electric and hybrid vehicles in hopes that drivers will consider adopting electric cars themselves. Read more at Formula E's website. The average fuel economy of new vehicles has reached a new high of 25.8 miles per gallon, according to the University of Michigan. The school's Transportation Research Institute (UMTRI) used the window sticker ratings of the vehicles to reach that number for the month of August. That's 0.2 mpg higher than July, and 5.7 mpg higher than October 2007, when UMTRI began recording the data. The group also found that average emissions per driver are down by 22 percent since October 2007. Read more at Green Car Congress. The United States Advanced Battery Consortium has awarded a $667,452 development contract to battery maker Xerion. The contract - a 50-percent cost share co-funded by the US Department of Energy - is for a 15-month program to develop next-generation batteries for plug-in hybrids. Read more in the press release below. Fairmont Beijing Introduces Eco-friendly Partnership with BMW's New Electric i Series BEIJING, Sept. 4, 2014 /PRNewswire/ -- Fairmont Beijing is partnering with BMW in a showcase of the luxury carmaker's new electric, environment-friendly i Series.

Hydrogen could deliver one fifth of world carbon cuts by 2050, industry says

BONN, Germany — Increasing the use of hydrogen in power, transport, heat and industry could deliver around one fifth of the total carbon emissions cuts needed to limit global warming to safe levels by mid-century, a report by the Hydrogen Council said on Monday. To encourage industries to use hydrogen, Toyota and Air Liquide helped set up the Hydrogen Council, a global lobby launched in January this year. Its 27 members include automakers Audi, BMW, Daimler, Honda and Hyundai, and energy firms such as Shell and Total. The council said using hydrogen for transport, energy generation, energy storage, industry, heat and power could cut annual carbon emissions by 6 billion tonnes by 2050. "This would ... contribute roughly 20 percent of the additional abatement required to limit global warming to two degrees Celsius," the council said in a report released on the sidelines of a U.N. climate conference in Bonn. To achieve a two-degree limit this century agreed by governments in Paris in 2015, the world must reduce energy-related carbon emissions by 60 percent by 2050. The report said one in 12 cars sold in California, Germany and Japan were expected to be powered by hydrogen by 2030. By 2050, hydrogen could power 400 million cars, 15 million to 20 million trucks, around 5 million buses, a quarter of passenger ships and a fifth of non-electrified train tracks, as well as some airplanes and freight ships. Achieving this shift in transport and other sectors would require investment of $280 billion by 2030, with about $110 billion to fund hydrogen output, $80 billion for storage, transport and distribution, and $70 billion to develop products. Fuel cell vehicles combine hydrogen and oxygen to produce electricity to power an electric motor, producing water as a byproduct. However, making hydrogen from fossil fuels, a common route, also produces some greenhouse gas emissions. So far the take-up of hydrogen vehicles is tiny and industry experts say their wider use is years away, with high purchase prices and a lack of refueling stations the major barriers. But some firms, such as miner Anglo American and carmaker Toyota, are pushing for fuel cell cars to play a role even with the rise of battery-powered electric vehicles (EVs). Woong-chul Yang, vice chairman of automotive research and development at Hyundai said EVs and hydrogen fuel cell cars were needed because EVs were better for city driving and fuel cell vehicles better for longer journeys.