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First Drive: Saturn Aura + HCCI

It’s not often that a blogger has the www.ncitech.co.uk opportunity to viagra 50 mg meet with GM engineers and look here cialis 50 mg tablets test drive a one-of-a-kind prototype, but that’s exactly the opportunity I was given the other day. GM first presented a run-down of the interesting tech (which we've written up here) and then handed over the keys so I could see what I thought first hand. The HCCI-equipped Saturn Aura I drove was hot off the proving grounds and the only one of its kind in the http://www.revistadeteatro.com/discount-viagra-online United States (there are two HCCI Opels in Europe, like the Opel pictured), and evolved out of order prescription levitra an idea hatched way back in the 70s.

My first impression (and the first negative) came before even stepping into the car, and that was when I learned I would be driving an automatic. Evidently, Americans don’t drive stick anymore, but I was still jealous when I learned the two HCCI Opels in Europe were stick shift. I’ll try to put that aside since I’m supposed to be considering the engine, not the whole car.

The Saturn Aura is a fairly large, family-size sedan, and is not uncomfortable by any means. I was given the impression by Paul Najt that this was the type of car currently targeted for HCCI, so I would wager it was a fairly representative of what we as consumers might actually be seeing. GM did hint at the it's great! viagra dosage possibility of a V6 HCCI in such a vehicle, but that is just speculation right now, as to the best of my knowledge, there is no such engine in existence.

Those disclaimers made, my first driving impression was “wow, this thing really is like a diesel.” It sounded and drove the part when in HCCI mode, and then in switching back to standard ignition (SI) mode showed its side as a typical gasoline-powered car. The transitions were definitely a little rough around the edges, but I was assured (and believe) that these things will be cleared up long before the car is sent to consumers.

Given the size of the car, the 2.2-liter 4-cylinder had a little less oomph than you would expect from your typical Detroit-built family sedan, but it definitely wasn’t unbearable and I didn’t find myself digging into the gas to keep up with traffic. Monitoring the HCCI display screen while cruising you could see (and feel) the engine performing its unique compression ignition. Such a screen won’t be available in production cars, but even in the unusually aggressive driving cycle that I put the www.tevaka.com car through in the downtown, live-traffic course, I was in fuel-saving HCCI mode over 50% of the time.

That was, in fact, the most impressive part of the test drive. While I understand that an HCCI mode monitor is indian cialis unlikely to levitra no prescription canada come with a production model (due to marketing reasons), even without being particularly conscious of http://zvezdegranda.rs/levitra-online-canada my driving, this new technology was in use over half the time. Even though HCCI mode cannot carry the car to highway speeds (it only reaches up to 55 mph right now), the fact that is in operation the majority of the time bodes well for GM’s quoted 15% increase in fuel economy.

It was a pleasure to drive, and it will be interesting to see how (and if and when) it is introduced to the public. If the car does maintain a slight transition between HCCI and SI modes or the sound difference is profound (which really gives the impression of driving a diesel while in HCCI mode), driving an equipped engine will definitely take a shift in the mind of the consumer. However, I won’t fault GM for that now, as it seems that consumers are finally ready to only today online ordering levitra make that switch.

Let’s just hope that those fears don’t keep GM from putting the kibosh on this technology. It gets a definite thumbs up from me.

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Comments (12)Add Comment
0
15% increase in fuel economy.
written by Green Driver, May 13, 2008
Just wondering what the www.bsd-berlin.de MPG actually is?
0
...
written by VaPrius, May 13, 2008
Sounds like a great idea. Paired with hybrid technology this would be addition.
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Only 15%?
written by Harry, May 13, 2008
I have a 1.6L 4 cyl diesel of the same class as the car shown. I can get 50MPG (imperial)/42MPG US on a long trip. Does it beat that? Modern car diesels have Exhaust Gas Reactors which burn the NOx, but they're not without their problems either.

Any new engine technology is going to have teething problems, but I would go for a smaller stop-start engine, with ultracaps feeding booster motors, and regenerative braking.
0
Response
written by EcoModder, May 13, 2008
Green Driver - It's hard to say what the actual fuel economy will be, since there're no comparable engine/vehicle combination out there, based on what I drove. However, GM is fairly certain of their 15%, meaning that a car normally getting 30 MPG EPA would get 34.5 MPG with an HCCI engine.

VaPrius - GM is working on generic viagra money order this!

Harry - There's no problem with diesels, and diesel emissions technology is there, but it's incredibly expensive. HCCI doesn't require any $2000 catalysts or urea injection systems to have low emissions, and the engine itself it cheaper than diesel to begin with.
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15% increase
written by Andy, May 13, 2008
The difference between 30mpg and 34.5mpg is like the difference of killing our species and killing our species 5 minutes later.

How about buying an old civic that still gets 50mpg?
How about saving your money and canadian levitra walking instead?
0
yeah more senseless technology
written by bob bobberson, May 13, 2008
I feel like big car companies are like the old Soviet Union, slow to respond to try it canadian healthcare viagra what the people want. I want a damn electric CAR! Rick Wagoner tear down this wall! Stop being the evil empire! Build me an electric car!
0
...
written by dialtone, May 13, 2008
something even better than this - check out Coates Spherical Rotary Valve
http://www.coatesengine.com/
just look at the picture & you can see it is much simpler & a better efficiency gain also

0
Incredibly expensive?
written by Harry, May 14, 2008
Diesels sell at a slight premium over petrol/gas here in Europe, because they return better mileage, and the engines last longer than petrol (usually, unless the mfr tried something new and made a design fault)

So if they're incredibly expensive in the US, it's either because you haven't got the economies of price viagra scale (in cars sold and/or fuel distribution infrastructure) we have here, or you're being had by the mfrs.

In the UK, nearly half of all cars sold are diesel. On the continent, at least half are. These figures are mainly because TCO is cheaper for diesel cars here.
0
heading to bull horn edge
written by think, May 14, 2008
Detroit car makers always stubborn headed stuck with in technological stone age. If such behavior persist, The European and Asian car makers will eventually wipe out entire 3 remaining car makers in Detroit into distinction. Renewable energy is the look there indian levitra only future solution.
0
...
written by EV, May 14, 2008
This tech will be useful regardless of the fuel. It could be used for biofuels powering a generator for an electric car, for instance.

Build me an electric car!

Wait 2 years.

So if they're incredibly expensive in the US, it's either because you haven't got the economies of scale (in cars sold and/or fuel distribution infrastructure) we have here, or you're being had by the mfrs.

Due to two things Diesel vehicles are more expensive in the US.

The first is the pollution controls. One of the requirements is buy levitra without that the particulates not be larger than a certain size. Diesel engines produce particles significantly larger than gasoline engines. This means diesel engines in the US have to be made differently than those in the EU. Or why else would BMW and Audi and VW not introduce some of their diesels in the US?

The second is a combination of the pollution controls and the oil we have. Our oil contains significantly more sulfur than Europe's does. This means that diesels will produce more SO2. They get around this be doing some unusual things such as adding urea to the fuel mixture (yes, urine) and some other things.

It has nothing to do with the automakers trying to pull something over the buyers. Diesels are sold, but they are usually trucks that need heavy horsepower, not regular cars and vans.
Detroit car makers always stubborn headed stuck with in technological stone age. If such behavior persist, The European and Asian car makers will eventually wipe out entire 3 remaining car makers in Detroit into distinction. Renewable energy is the only future solution.

And, pray tell, how will a windmill or solar cells directly power a car? Last I checked, they could not.
0
diesel best option for going green
written by Merv, June 23, 2008
I reciently purchased a 06 Volkswagon tdi. I get about 41 in mixed driving and 50 highway. Diesels are just getting broke in when most gas engines are starting to overnight viagra fail. Having owned GM products for 50 years, I think they are missing out not importing their diesels. Honda designed one of the mose enviroment friendsy diesel from scratch and levitra canadian pharmacy will be here next year at 52mpg . America loses again because Detroit has its head in the sand.
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fuel-efficiency
written by jietse, May 12, 2010
i like research by companies to get better fuel efficiency, but i was wondering, why researching it and not using it in the current cars. That is stupid!!
always articles about better fuel efficiency an research and other stuff, but it never makes it way to the public, whereas it can be useful.
If you make some calculations, 15% in one car is nothing, but use this in about a million cars, the effect will be great.
But i think this and other technologies as the groove-technology by somender singh, is never going to make it to the proletarians. These technologies CAN make a difference if they are used.

grtzz from Belgium!!

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