05-06-2008, 05:06 PM | #1 | ||
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GM moves closer to HCCI engine production
Imagine getting V6 fuel economy from your V8 Camaro. It could happen sooner than later with HCCI engine technology
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05-06-2008, 05:18 PM | #2 |
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Hmmm Interesting
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05-06-2008, 05:38 PM | #3 |
Petro-sexual
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+2; very interesting. You know the bug-eaters are having their way when a gas engine runs like a diesel. J/K
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05-06-2008, 11:16 PM | #4 |
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I wonder how much gas would this system save?
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05-06-2008, 11:20 PM | #5 |
E.B.A.H.
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Sounds like diesel technology. Heat up the cylinder and then use compression to combust the fuel. It's a diesel engine that uses gasoline, right?
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05-06-2008, 11:34 PM | #6 |
Drives: 2010 Camaro 1LT/RS M6 Join Date: Nov 2007
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I think the 305 in my 3rd Gen had this technology. Every time I let someone else drive it, when I got it back it would run after I shut the engine off. That was working at idle for about a minute anyway... if I kept giving it gas I bet it would have done it longer.
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05-06-2008, 11:36 PM | #7 |
I used to be Dragoneye...
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"or HCCI, which allows petrol cars to improve fuel efficiency by as much as 15%"
The current, non-HCCI, 2.2 in the Cobalt XFE gets 25city/36hwy...so 15 percent increase: 28/40? Plus the DI and the VVT they've included in the Aura's test engine,...I'd say we're looking at an easy 45mpg four-banger. Eat that, Prius!!! |
05-07-2008, 12:15 AM | #8 |
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05-07-2008, 09:54 AM | #9 | |
Petro-sexual
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Quote:
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05-07-2008, 10:27 AM | #10 |
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I'd love to see this happen. It's technology like this that makes me think GM will overcome new regulations on efficiency. Plus, more efficiency is always good.
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05-07-2008, 12:53 PM | #11 |
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Interesting, well that puts it back in my mind when it was mentioned early on that the Camaro could have 30 MPG, this sorta development now makes me think maybe it wasn't the 4 cyc that was only suppose to do that kinda mileage. Hmmmm..
Wow if this is in the new Camaro. I'm just losing my mind, is it April 2009 yet?!?!?!?!
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05-07-2008, 01:47 PM | #12 |
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Hmm.
There's something I still haven't been able to fathom yet. My '91 vert I had (305 TPI) got 21+ MPG on the highway, and this was 17 years ago in a CONVERTIBLE. My 400+ HP Supra got 25 MPG hwy, and it was a '94. early 90's HOndas could easily get 40 MPG on the highway...so why are these numbers so hard to believe now? I know cars are heavier now (duh, make them lighter and save gas folks!) but there's got to be something else wrong with the picture here that it's so difficult to fathom a V8 making over 25 MPG. |
05-07-2008, 01:49 PM | #13 |
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It mentions the added benefit of not using expensive diesel emissions systems. It also so should mention the benefit of diesel efficiency without diesel prices.
I'd pay a little extra to get this system in my Camaro. |
05-13-2008, 11:49 AM | #14 |
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Actually, the large arguement for HCCI is the improvement in emissions.
Normally combusted gasoline burns, producing HEAT andthus NOx emissions. HCCI doesn't burn the charge, but actually harnesses the compression energy to combust the entire charge simultaneously. Because it doesn't technically *burn* (like in a diesel) there is actually very little heat produced. They already have these engines running, but only for certain drive cycles. They are working on a way to get them to run under more conditions. Essentially, using computer controlled forced induction and constantly monitoring cylinder temperature, intake charge temperature, and barometric pressure they can calculate how much intake duration (valve control) they need to get the engine to 'knock' at the right time. Differenced between this and diesel... Much lighter block, less torque (no sustained burn). Ignition timing isn't adjustable by adjusting fuel, it's all computer controlled. I don't know if that made any sense, but when I learned about this technology in class I geeked out. I'd be more excited in looking at what kind of POWER you can get out of your V8 than what kind of fuel economy you can get. HCCI engines produce vastly more power than standard combustion because of the energy that isn't lost as heat. However the engine sounds a little different :S |
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