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#1
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Could the DiesOtto engine spell the end of MB diesel offerings? Or is it just hype?
I searched the forums and was surprised that this hasn't been discussed yet. Not too long ago according to the MBCA-Houston newsletter, MB unveiled the new "DiesOtto" engine. It's a gasoline engine that incorporates both Otto cycle and sparkless combustion. On startup and at foot to the floor acceleration, the engine runs in "petrol mode". This means it's using spark plugs to ignite the gas during those times. Once the engine is warmed up and at cruise, it runs in "diesel mode". The compression ratio is raised and the spark plugs are deactivated. The engine has four cylinders, displacement is 1.8L, has twin turbos, direct injection, puts out 230bhp and 295 FtLb of torque. MB thinks it could get 40mpg out of this engine in a car the size of a S-class. This engine will deliver good power, and diesel like economy with lower emissions than a diesel engine, it could see production in 2012. It's supposed to be unveiled in the new F700 concept car in Frankfurt later this year. So what do you all think, is it the greatest thing since sliced bread and will spell the end of CDIs and Bluetecs? Or will it be a repeat of the MB rotary engine concept of the late 60's? (ie: Highly anticipated, but doesn't make it to production).
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#2
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That is the problem. There isn't a way to reliably and cheaply raise the compression ratio. That's why they are introducing it in their S-Class. It will be a decade or more, if at all, before we see this technology trickle down.
Saab tried that a long time ago with a movable engine block. Honestly, I doubt it will make it beyond the hype-concept car stage. |
#3
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I think there is no use for me to even think about it. I would never ever have the funds, nor would I spend large amounts of $ for the newer MB's anyway.......
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Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
#4
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all things set aside, i think the motor itself is an excellent concept.
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82' 300SD |
#5
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Not unless we all start earning 7 digit incomes.
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#6
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That'd be cool!
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-Matt EPA Section 609 Certified MVAC Technician ----------------- Oil Burner Kartel Member #10 Ahh the smell of Diesel Fuel, it's like coffee in the morning! My Car: 1982 300SD Turbo Diesel (231,500 miles!) RIP 1984 300SD Turbo Diesel Custom (235,500 mi on driveline.) - On Road!! www.icsrepair.com |
#7
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Quote:
There was an article in Motor Trend about how there are all these European diesels, the CDI, TDI, etc. that are just as efficient as Japanese hybrids, yet with much simpler and reliable mechanicals. The Germans have responded to higher-economy needs by perfecting their existing technology, technology that's been around for many decades, while the Japanese respond by coming up with extremely complicated hybrid drivetrains. Everyone knows the Prius doesn't live up to its 60 mpg hype, but VW's 1.3 TDI easily exceeds that, and with a lot less electronics to boot. My point is, this is Mercedes's answer to Japanese technology. Let's face it, celebrities aren't driving Mercedes CDIs--they're driving Priuses. This is Mercedes's way of proving that they too are capable of developing extremely high-tech engines. And the likelihood that they'll sell this engine? Look at Mercedes's current S-class lineup in the USA. The "base" model is a 5.5L V8. A 1.8L S-class? Not gonna happen.
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99 E300 TD -- sold 01 540i 6 spd |
#8
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It sounds like a cool idea, but they just use SI to start and accelerate? Current diesels seem to do that just fine. And what fuel would it burn?
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'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg |
#9
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It'd burn gas.
It's a compression ignition gasoline engine.
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99 E300 TD -- sold 01 540i 6 spd |
#10
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Quote:
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#11
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Well, it does seem sometimes like diesel is a bad word in California...
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Your TACH may have a loose connection...I was wondering why your mechanic would be dead one minute then flopping around the next... PanzerSD i am inspired. i will replace my windsheild... with an intercooler. swedishK |
#12
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Then Mercedes just screwed itself by calling the engine DiesOtto.
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#13
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Gasoline?!?! With less BTUs and terrible cetane. I would not think you would get good performance using compression to ignite the fuel.
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'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg |
#14
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At least it might put Lovecrap out of business...
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#15
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They have been talking about it for years.
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
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