Thursday, February 3, 2011

The Physics of: Engine Cylinder-Bank Angles – Feature

January 14, 2011 at 11:16 am by John Pearley Huffman and Tony Quiroga

 


Why the angle between banks is critical to a smooth-running engine.


The inside of an internal-combustion engine is a just about the most violent place on Earth. Thousands of explosions happen every minute, resulting in great masses of metal being thrown up, down, and around. It’s almost miraculous that engines can produce civilized, usable thrust at all. Because what an engine would really like to do is blow itself apart.


Keep Reading: The Physics of: Engine Cylinder-Bank Angles – Feature


Related posts: The Future of the Internal-Combustion Engine – FeatureTags: internal-combustion, The Physics of |


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2012 BMW Z4 Roadster Will Be First to Bring BMW’s New Four-Cylinder Engine to U.S.

January 13, 2011 at 10:11 am by Steve Siler

While there may be no BMW model that the company’s glorious 3.0-liter inline-six cannot propel, nothing says that engine must propel every BMW. Engine downsizing has led the brand to develop a new family of four-cylinder engines, a turbocharged version of which is poised to replace the naturally aspirated 3.0-liter in some U.S.-bound models.

The first model to make the switch from six to turbocharged four is the Z4 roadster. The four-pot, according to our source, will produce at least 200 hp; a torque figure was not shared, but we expect about 220 to 230 lb-ft. The source asserted that the turbo four will be an adequate and thrifty replacement for the inline-six, the latter producing 255 hp and 220 lb-ft of torque in the 2011 Z4 sDrive30i. The engine is expected to be lighter and less thirsty, which should help raise the base Z4’s fuel economy from 18 mpg city/28 highway up to around 20/30, if not higher. Will the four have the same rev-to-the-stars zeal as the magical six-cylinder? Probably not. But it could at least be accompanied by a price drop from the $47,375 currently required to get into a Z4.

The last BMW models to make it onto our shores with just four cylinders were the unloved 318ti and the original Z3. If sneaking the new engine in under the long bonnet of the Z4 seems like heresy, bear in mind that Porsche’s next Boxster is also expected to come with a four-banger, and Mercedes-Benz’s just-revealed 2012 SLK will offer a turbocharged 1.8-liter four starting next spring.

Related posts: Ford Debuts Four-Cylinder EcoBoost Engine Family in FrankfurtCrazy Rally Buggy with BMW Diesel Six-CylinderBMW Won’t Bring M3 GTS to U.S.2009 BMW Z4 Roadster – Official Photos and InfoFuture Saabs to Use Turbocharged BMW Four-Cylinder, More Ties LikelyTags: BMW, BMW Z4, BMW Z4 roadster, engine downsizing, turbocharged |


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John Phillips: Our “Media Adviser” Retires to Oregon to Grow Mold – Column

January 14, 2011 at 11:28 am by John Phillips

John Phillips: Our “Media Adviser” Retires to Oregon to Grow Mold

“I lived one block from a druggie who killed his girlfriend, buried her on the property, then dug her up again.”

If you write for C/D, every word you submit will be scrutinized by the managing editor, or “M.E.,” who, after reading this very sentence, will ask whether the word “submit” might be replaced by “compose” and whether the word “scrutinized” might be replaced by “considered” and who will further point out that this sentence contains 89 words and might more profitably be replaced entirely by a telling anecdote or a direct quote, and, by the way, might you soon consider an occupation in which writing figures not at all?

Keep Reading: John Phillips: Our “Media Adviser” Retires to Oregon to Grow Mold – Column

Related posts: John Phillips: A Whole Bunch of What Not to Write – ColumnJohn Phillips: Nothing is Certain but Death and Taxis – ColumnJohn Phillips: What Really Goes on Behind the Maranello Gates – ColumnJohn Phillips: I Want to Be the Ginger Man – ColumnJohn Phillips: Could There be Such a Thing as “The Best Car in the World”? Probably Not – ColumnTags: C/D Staff, column, John Phillips |


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Wednesday, February 2, 2011

2012 Mercedes-Benz SLK-class – Official Photos and Info

Sorry, I could not read the content fromt this page.

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Aaron Robinson: Cars Get a Low Priority in the Rebuilding of Our Cities – Column

January 18, 2011 at 6:26 pm by Aaron Robinson

 


For many years after World War II, you were as likely to get a grocery store built within walking distance as a smelter.


Coincidentally, my oldest friend is also named Aaron. As fourth-graders on the playground, we called ourselves “Aaron 1” and “Aaron 2,” but I don’t remember with certainty ?who was which.


Keep Reading: Aaron Robinson: Cars Get a Low Priority in the Rebuilding of Our Cities – Column


No related posts.

Tags: Aaron Robinson, column, highway, mass transit |


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The Continental’s Detroit Notepad: Transmission Trends, Why Germany Shouldn’t Want the U.S. Passat, and Who Didn’t Show

 


Each week, our German correspondent slices and dices the latest rumblings, news, and quick-hit driving impressions from the other side of the pond. His byline may say Jens Meiners, but we simply call him . . . the Continental.


Seven- and eight-speed transmissions are so 2010: The transmission gurus tell me that nine- and 10-speed boxes are around the corner. Why? To keep the engine where it’s happiest in the rev band, of course, without the inefficiency and dull driving characteristics of a CVT. (Audi’s multitronic CVT will be history in a few years.)


Not too long ago, five speeds were deemed more than sufficient. Have engines really become that inflexible? Not really, but there’s another reason, and it’s not a very good one: Marketing people believe that seven speeds are better than six, eight are better than seven, nine are better than eight, etc. Ad infinitum? Engineers are secretly worried, and so am I. I am not interested in having a choice of more than a handful of gears when negotiating a particular corner, and I’d ideally like to know which gear I am in without having to check the digital indicator (which doesn’t always tell you the truth, such as with a certain seven-speed dual-clutch box connected to an oh-so-torquey engine that pretends to take off in second gear when it actually briefly engages first).


Chrysler will be one of the first companies to use eight- and nine-speed transmissions, replacing some rather ancient slushboxes (and so it is partly forgiven). It will also be the next company to use a version of the clever MultiAir valve-lift system which was launched in Fiat and Alfa Romeo models. It will now be applied to the four-cylinder “world engine,” which sees duty in everything from the Dodge Caliber to the Chrysler 200, and I am guessing it will also make its way into the Pentastar V-6.


Accounting for Different Tastes


I found it curious that Ford’s Detroit display was largely dominated by European-developed and -styled cars such as the Focus, C-Max, and Fiesta, as well as the Vertrek concept. Another European, the Buick Verano, is a version of the hatchback-only Opel Astra, and so well-executed that I think it would sell in the old world, too.



My colleagues in Germany have noticed that the NMS (I’ll keep calling the U.S.-market Passat the NMS, as I have grown fond of the moniker over the years) is bigger, cheaper, and better-looking than the Euro Passat—that car is viewed as just a major face lift thanks to keeping an unchanged center section. Now VW must explain that we really don’t want the NMS in Germany since it is not as good as and is more cheaply engineered than the European Passat. In other words, that it deviates from the company’s engineering gospel under certain circumstances. Nice.


Mercedes-Benz displayed a pre-face-lift S-class concept car with plug-in technology right in front of a current model, to make it easier for you to spot the differences (hints: look for the old front bumper with Opel Vectra motif, LED-less headlights, jellybean side mirrors, and taillights with plastic strips). Add to that the fact that the B-class F-Cell (200 will be put on the road) comes in soon-obsolete, first-generation clothing and it underscores Daimler’s “new technology, old style” auto show theme.


Detroit’s Absentees, Real and Imagined


The Japanese didn’t shine in the Motor City. Toyota’s display was utterly charmless, and Nissan/Infiniti were simply absent. But they are coming back for next year’s Detroit auto show. Will they pull out of New York then? No. The strategy to be present at just one show per continent is history.



Tesla’s showing of a Model S body proved the company is moving forward and serious about getting it on the road. If you were surprised about the incredible performance promised at a reasonable price point, be advised that Tesla will offer several configurations; the standard Model S won’t come close to the promised 300-mile range.


Suspiciously absent was Fisker, which is in the process of getting the first Karma sedans ready for delivery. But I know for a fact that engineering work on the Nina sedan has started, and there is some likelihood of seeing the Karma folding-roof convertible on the road within two years.


Related posts: New Sketches of VW’s U.S. Passat Replacement Released; Will Debut at Detroit Auto Show2012 Volkswagen Passat Debuts @ Detroit Auto Show – VideoThe Continental’s Paris Notepad: Fully Aluminum Mercedes-Benz SL, Corrected Lambo Concept Weight, and the New VW/Audi/Porsche Mid-Engine Sports CarVolkswagen Teases 2012 Passat’s Detroit RevealFive Fun Debuts at the 2009 Detroit Auto Show – Feature

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Tuesday, February 1, 2011

2011 BMW 1-series M Coupe @ Detroit Auto Show – Video

January 13, 2011 at 1:43 pm by Car and Driver Tags: 2011 Detroit Auto Show, American, auto shows, BMW, BMW 1-series, BMW 1-series M, BMW M, coupe, Detroit Auto Show, German, sports car, video |


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ZF Announces Nine-Speed Automatic Transmission for Front-Drivers

January 13, 2011 at 12:34 pm by K.C. Colwell

In Detroit this week, Germany’s ZF announced a new nine-speed transaxle it has in the works, called 9HP. It’s not based on the longitudinal 8HP that is found in BMWs and Bentleys, but an all-new automatic transmission built for front-engine, front-wheel-drive cars. We know it will end up in some Chryslers, but, beyond that, ZF is tight-lipped about its customers, and, well, just about everything else regarding this transmission.

We do know the 9HP will be available to manufacturers in 2012 and that ZF says the efficiency improvements will be at least 10 percent when compared to a modern six-speed auto. Like the 8HP, the 9HP will lock its torque converter at very low revs, and ZF will offer an electric-motor coupler for customers wishing to hybridize their vehicles. The transmission’s torque limit is 295 lb-ft.

Despite the additional ratios, the 9HP is no larger than a modern six-speed auto. Since the transmission will be used in existing architectures, and because the space between a car’s front wheels isn’t growing any time soon, a wider box is not an option. This means ZF is limited to building a trans that can’t be wider than about 14.2 inches and in some cases is as narrow as 13.4 inches.

ZF is not just in the transmission business. It makes complete axles, steering units, pedal sets, even airbag housings. To see an overview of everything at the 2011 Detroit auto show with ZF components, check out this interactive site.

Related posts: Chrysler Licenses Eight-Speed Automatic Transmission from ZFZF’s 8-Speed Automatic Transmission – Tech Dept.Ford Introduces New Automatic Transmission on 2011 Super Duty Trucks2011 Audi A4, A5, and Q5 Get Eight-Speed Automatic Transmissions; Q5 2.0T Added – Car NewsFord Announces New PowerShift Dual-Clutch Automated Manual Transmission for 2010 – Car NewsTags: 2011 Detroit Auto Show, auto shows, Chrysler, transmission, ZF |


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Supercharged 2012 Chevrolet Camaro May Not Be Called Z28 – Future Cars

January 13, 2011 at 4:48 pm by Justin Berkowitz


In addition to the 550-hp Camaro, a 45th Anniversary Edition is on the way, as are other upgrades.


Since July, we’ve had photographic proof that Chevy’s engineers are hard at work on a supercharged version of the Camaro. The hot pony car is slated to receive a version of the blown 6.2-liter LSA V-8 from the Cadillac CTS-V, where it produces 556 hp. The usual questions of “When?” and “How much?” remain open, and we can now add a third to the list: What’s it to be called?


Keep Reading: Supercharged 2012 Chevrolet Camaro May Not Be Called Z28 – Future Cars


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