Ford claims new 6spd increases FE up to 9%
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Apparently they are using a 6 speed manual and a 6 speed automatic. The article only claims that the auto gets the 9% though. From the rest of the article though, the new Focus is shaping up to be a nice car.
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http://ecomodder.com/forum/attachmen...1&d=1264594312 |
Now, if they give both the manual and the auto nice, tall gearing, and only off cruise (throttle?) control on the automatic!
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The auto probably has an ECO setting in its software to change gears at lower rpm. If a normal auto had similar (many do), then that would give 2%-5% savings over "normal" mode.
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...or, conversely, how about having the ECU provide driver-switchable "ECO" and "PWR" control settings over the transmission?
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The "Automatic" is a computer shifted manual, thus the 9% savings and the term "power shift" being used to describe it. I've seen it and lust after it. It is also tiny and very light compated to any manual or automatic I've seen. I believe this was developed with a German company, I think Getrag?
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Not surprising, Ford seems to be pointing their FE attempts toward their auto transmissions, especially in the Focii.. in fact, some auto Focii already get better FE than the manual versions on the highway. (EPA)
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Gas Mileage of 2002 Ford Focus
The Wagon models reflect it in City mileage at the bottom of that chart. |
Tygen1 -
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Any of us with a manual could still slay the automatic's FE around town. Steady-state highway cruising is where it may have an advantage. You can't beat the FE of engine-off, though!
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Additionally it has a coast down feature that disengages the clutch to allow you to coast further with just a tap of the break, so theoretically you could put in a kill switch that kills the injectors and signals the computer that the brakes have been activated. EOC in an ATX !
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Picture and text taken from: 2009 Ford PowerShift 6-Speed Double Clutch Trans Car Review and Specs | 2009 Ford PowerShift 6-Speed Double Clutch Trans Car Wallpaper Pictures Pics
The PowerShift transmission is a development of GETRAG-Ford Transmissions GmbH, a 50:50 GETRAG/Ford joint venture. GETRAG-Ford PowerShift technology is intelligent and revolutionary in its operation. To explain, the six-speed PowerShift transmission consists essentially of two layshaft transmissions working in parallel, each with its own clutch unit. The layout of the intermediate shafts – one carries the uneven gears 1, 3 and 5 whilst the other carries the even gears 2, 4 and 6 – allows the next gear to be pre-selected whilst the vehicle is in motion and the engine is at full power. With the next gear pre-selected, the gear change occurs through the opposed activation of both clutches. The double-clutch activations are co-ordinated such that no torque interruption occurs. In contrast to a conventional automatic transmission, the basic technical configuration of the GETRAG-Ford PowerShift transmission offers numerous advantages. It does not require any complex sub-systems such as a torque converter, planetary gear sets, multiple wet clutches and multiple bands – all of which significantly reduce the efficiency of a conventional automatic transmission due to increased inertia and drag torque effects. The result is impressive: the PowerShift transmission provides the ease of operation and permanent motion of a conventional automatic transmission as well as the driving performance of a manual gearbox. It also delivers quick and sporty shifts while maintaining a high degree of shift smoothness and refinement. A further advantage of the GETRAG-Ford PowerShift transmission is its high torque capacity and free choice of ratios, making it an ideal partner of modern high performance diesel engines. The GETRAG-Ford PowerShift transmission technology is available in Europe, Australia and ASEAN markets in the new Ford Focus TDCi in combination with the 100kW, 320Nm 2.0-litre Duratorq TDCi turbodiesel engine. In this combination, GETRAG-Ford PowerShift offers the win-win advantage of improved performance and reduced fuel consumption compared with a conventional automatic transmission. Plus, it is fun to drive. |
The Getrag box is similar to VW groups DSG arrangement mechanically although I suggest the electronics are probably new and upgraded.
By the way the DSG set up is NOT new despite claims to the contrary. It was first used around WW I and was invented by an Englishman named Wilson and called a "pre-selector" gearbox. I recall seeing one with the covers off in a military museum a few years ago from one of the earliest tanks. I can also recall the AEC buses of the 1950's (and they were old when I rode in them in the 1960's) having the same gearboxes. Pete. |
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9% more than estimated EPA figures that can be inflated 10% more in any given year?:confused: |
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Still seems to be an awful lots of whirring parts in it vs. a m/t, especially a 3, 4, or 5 speed m/t.
In the '80s the "eco-versions" (yes, they did exist! :eek: ) had 4-speed m/ts while regular m/ts were 5 speed. Less shifting, fewer whirring parts, probably taller top ratio too. |
Even with freewheel coasting available from the automatic, as long as the gear ratios between the automatic and manual are the same, intelligent driving techniques will allow you to squeeze better mileage from manual. Unless they have changed the programming from that of the typical automatic, you're still going to have the problem of the automatic revving too high in each gear before shifting to the next when you accellerate at 70%-80% throttle, so you can't get the fuel efficient high load/low rpm acceleration condition that is easy to optain with a manual.
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Agreed that it won't be as effcient a someone useing a mtx to do high load low rpm shifting. It's a great step forward for the masses though, and exciting to me as an ATX driver suffering from torque converter slip, delayed shifts, etc...
I beleive the 9% figure is comparing it to a regular automatic transmission. Which makes this new ATX equal to the MTX in mpg ratings. Which helps raise Fords corprate average because most folks buy the ATX and they plan on putting this trans in pretty much all their cars by 2013. Stategery, to quote a fine sourthern gentalman :) |
I agree with the step forward comment. Unfortunately, as much as we might like everyone to learn the ways of the Church of Ecomodder, it's not going to happen. There are far more new, uneducated, careless drivers added every day than we could even begin to hope to get across to. While it's a great idea to make the driver more efficient, the car is the starting point, and that's what it's gotta be.
You also have to account for the people who simply aren't willing to change their driving style - and there are lots of them - who could really care less about being efficient, they just do what they do. For those people, the only option is to make their vehicle more efficient. While more efficient vehicles aren't an answer right now, due to "rollout times", all of our really old vehicles will eventually become obsolete... and then the vehicles that we consider "new" will be 20 and 30 years old, and maybe, if properly maintained, will be recycled and still running at that point. Either that, or more people will go broke trying to run their junkers into the ground, and be forced to walk. I'd prefer the latter. More room on the road for me to not have to slow down around curves and such. |
Tygen1 -
I can't find the article on the Internet, but I read this on page 14 of the November 2009 Automobile magazine : Front-wheel-drive BMWs planned Quote:
CarloSW2 |
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It was supposed to be the first 7 speed automatic used in passenger car applications in the same gearbox. If I understand it correctly, it's actually a 3 speed which works in both directions, and has a variable final gear. This falls in line with some computer controlled Chrysler transmissions (Jeeps, and someone on this site did it) only needing a TCM upgrade to gain an extra ratio. It seems that the dual clutch design allows for engagement of a gear before or exactly as another has released, supposedly making shifts more positive and smooth. |
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I'd bet it's the same trans... |
I gotta admit, while not a ford fan, ford seems to be the only one actually putting real effort to improve mileage vs the other american companys.
The new focus should be good for the average people that will never hypermile them. And even the new mustang, for those diehard mustang fans (like my wife) is supposed to get 30 mpg with the new 6 speed auto and 3.7L engine, while pumping out hp numbers equivalent to the current 4.6L GT. Me, ill stick with my 50 mpg neon, since its getting better and better the more mods i make. |
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that is alot going in a tiny package. As if transverse flowed normal in the first place. they mus have "Good luck" with this one.. I simply cannot wait for this abyss of dainty to end... |
VW also claims a better mpg for the DSG versus the stick. I claim the DSG in our Jetta gets pretty good mpg for the crappy city traffic it is in most frequently.
I also claim that the thing shifts almost imperceptibly to the folks in the car. Although my frame of reference at the time was a Celica slushbox and a manual Audi TT heavily modded for track use. The standard shift setting in the Jetta hustles you up to 6th gear awful quickly, but it's pretty difficult to notice. I think it's a good thing. |
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