The contrarian in me loves it when conventional wisdom is proven to be not so wise. For decades, even before the first oil crisis of the 1970s, motorists have been told that making sure that your air filter is clean is one of the ways that you can improve your fuel economy. It’s intuitive to think that a clogged air filter will affect the way an engine “breathes”, how efficiently it can get gases in and out of the combustion chamber and how that might decrease fuel economy. That may have made sense decades ago, however it turns out that two different studies, one on gasoline engines and the other on diesels, performed by a team at the Oak Ridge National Laboratory, show that the fuel economy of modern, digitally controlled fuel injected engines isn’t significantly affected by the state of their air cleaners’ cleanliness. What made sense in the era or carburetors may no longer be applicable today. Apparently the engines’ ECUs working to keep emissions in spec are capable of leaning out the fuel mixture to account for a dirty air filter restricting airflow into the engine, resulting in insignificant drops in fuel economy. Though dirty air filters didn’t materially affect fuel economy in the modern cars, they did experience a decrease in acceleration performance so it’s still a good idea to replace a dirty air filter.
“Everybody uses the road and if some pay and some don’t then that’s an unfair situation that’s got to be resolved,” said Jim Whitty, manager of the Oregon Department of Transportation’s Office of Innovative Partnerships and Alternative Funding.
Ah, yes. As with any number of current governmental activities, the rationale for per-mile taxation will be fairness.
If the thought of a four-cylinder BMW gives you the creeps, then this will cause chronic dermatitis: BMW is thinking of putting three-cylinder engines into vehicles sold in the United States. Read More >
This Ford F250 has truly lived up to all the rigors of what a long lasting truck represents. Mileage beyond the moon. Scuffs aplenty. Vinyl seats. Not to mention an engine and powertrain that truly stood the test of time.
Starting with the redesigned 2013 Accord, Honda will introduce its new, ultra-efficient/more powerful Earth Dreams engine lineup. And it’s far from the most silly moniker attached to automotive technology.
It is a little bit like showing breasts at a plastic surgeon congress: At the annual meeting of the JSAE, the Japanese version of the Society of Automotive Engineers, Subaru totally disrobed its BRZ and shows it to a strictly professional audience. Read More >
The statement: “Alternatively, you can work the shift paddles to keep the engine revving between 4000 and 6300 rpm, where the power and torque curves approach, intersect, and then run almost parallel to the limiter.”
The car industry is under pressure to improve fuel efficiency. It is not that they have been sitting on their thumbs. Automakers have achieved large increases in fuel efficiency through better technology in recent decades, says MIT economist Christopher Knittel.
The problem is:
“Most of that technological progress has gone into compensating for weight and horsepower.”
There was ample hand-wringing when Volvo announced the death of their iconic station wagon in North America. While enthusiasts mourned the death of a cult classic, Volvo also announced a plug-in hybrid version of their V60 wagon, powered by a diesel engine and a hybrid drivetrain. Naturally, this vehicle was not destined for sale in North America.
The non-available V60 plug-in constituted the ultimate slap in the face for the Volvo faithful. Here was the newest generation of Volvo wagon (as opposed to the warmed over XC70 offered recently) with an environmental bent and the Euro-cachet of a diesel engine – but where was it? As Jamie Kitman of Automobile magazine rightfully pointed out, their core buyer is “green” but refusing to import such a vehicle may not be “lunacy”, because the Swedes have something more suited for American tastes – the same hybrid goodness, packaged as a gasoline-powered crossover.
Need an engineering project? Got 1,200 hours to kill with nothing to do? Take a tip from this heroically patient Spaniard, and hand-machine your own tiny (12 cc displacement) V12. This would be amazing feat of handwork even if it weren’t fully operational (using compressed air injection), but the fact that it works, runs and was made without a single CNC machine is nothing short of astounding.. If, as the book suggests, Shop Class is Soulcraft, this guy is like an engineering bodhisattva, inspiring us with his precision, patience and skill. In a world where not much is made by hand anymore, this achievement is worth taking a few minutes to marvel over… [Hat Tip: Dean Huston]
With engine management technologies creating ever-more refined, well-behaved engines, the snap-crackle-pop overrun at the beginning of this video is an increasingly rare throwback to the time when men were men and engines could blow up at any second. Sure, such playfulness will probably be managed out of existence by the time the F30 M3 hits dealerships, but it seems like a good omen for the M3′s return to six-cylinder power. In fact, it might even be possible that the backfire heard here has something to do with the electric turbocharger that’s rumored to give the new M3 lag-free turbo performance… but then you’d probably be a better judge of that than I.
Last Monday, we regaled you out with stories of Toyota coming to grips with the “new peak oil,” and other topics related to the growing gap (or lack thereof?) between global production and consumption oil. This week I’m feeling a little less apocalyptic, and little bit more indulgent. And really, why not celebrate those precious hydrocarbons while they’re still cheap and plentiful? This Mercedes SLS AMG Black Series may burn ‘em by the bushel, but it sure sounds good doing it. And though cars like the forthcoming 650 HP Shelby Mustang GT500 prove that performance is still alive in the 21st Century, high-revving, large-displacement, naturally-aspirated V8s like the AMG Black’s are going to be facing special challenges under future emissions standards. Which makes its gargling, chortling music all the sweeter to my ears…