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GM and the Diesel-Like Gasoline Engine

26 messages,  Last post on Jan 27, 2009 at 7:54 AM

You are in the Hybrid Vehicles Forum. Your Host is pf_flyer

What is this discussion about? Automotive News, Diesel, Fuel Efficiency (MPG)

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#7 of 26 Ah, one of my favorites by pf_flyer HOST Aug 28, 2007 (5:21 am)
Style over substance. Far too many people are worried about what they look like to others if you ask me.   I have no need to "look green" to prove anything to anyone. I'm about function. HCCI is a function, not a style.       But a tip of the hat for another idea for the blog! Appreciate it!
#8 of 26 Re: Comparisons [pf_flyer] by hwyhobo Aug 28, 2007 (2:53 pm)
Replying to: pf_flyer (Aug 28, 2007 3:31 am) I agree that for the "do nothing" approach from the driver, it is a significant gain. I was just hoping that the "breakthrough" would mean something that would beat diesel efficiency. I worry that it could slow down diesel introductions even more by domestic manufacturers like GM.   Still, if I had no other choices, certainly I would take 15% rather than nothing.
#9 of 26 Re: Comparisons [pf_flyer] by cooterbfd Aug 28, 2007 (7:17 pm)
Replying to: pf_flyer (Aug 28, 2007 3:31 am) I imagine since the cost of a diesel engine is much more than a gas engine, if this can be accomplished for very little more money than a conventional engine, it will be a winner.
#10 of 26 Re: GM and the Diesel-Like Gasoline Engine [hwyhobo] by tpe Aug 29, 2007 (7:49 am)
Replying to: hwyhobo (Aug 27, 2007 7:38 pm) Its a little misleading to compare diesel and gasoline engines in terms of efficiency without mentioning that diesel fuel contains more energy. It's true that a diesel engine is more efficient than a gasoline ICE but around half the mileage advantage is derived from the fuel. Diesel fuel contains approximately 14% more BTUs per gallon compared to unleaded gasoline. So while this HCCI technology might get a gasoline engine on par with diesel in terms of conversion efficiency it still won't match the diesel's mpg rating. Replies to this message: gagrice (Aug 30, 2007 6:56 am) bumpy (Aug 30, 2007 7:24 am)
#11 of 26 Re: GM and the Diesel-Like Gasoline Engine [tpe] by gagrice Aug 30, 2007 (6:56 am)
Replying to: tpe (Aug 29, 2007 7:49 am) My question is will the HCCI have diesel like torque at low RPMs? That along with the superior MPG is the draw to diesel engines for me. So much nicer not to rev an engine to 5000 RPM to use its power. Replies to this message: bumpy (Aug 30, 2007 7:24 am)
#12 of 26 Re: GM and the Diesel-Like Gasoline Engine [gagrice] by bumpy Aug 30, 2007 (7:24 am)
Replying to: gagrice (Aug 30, 2007 6:56 am) I'm inclined to say no, since the torque in a diesel comes mainly from the higher compression ratio.
#13 of 26 Maybe more to the point by boaz47 Aug 30, 2007 (1:30 pm)
Will they be cleaner than Diesel? Can diesel even be made to the same standards as Gas? ULEV or better?
#15 of 26 GM & Diesel like gasoline by jimlockey Sep 22, 2007 (7:26 am)
GM lies lies and lies when it comes to diesel cars. They are scared to death of diesel cars and what Europe is doing with them. Replies to this message: moparbad (Sep 22, 2007 1:21 pm) nedzel (Oct 17, 2007 11:44 am) galvang (Dec 02, 2007 9:56 pm) rockylee (Jan 09, 2008 11:13 am) coldcranker (Dec 07, 2008 11:25 am) Dynas (Jan 27, 2009 12:50 am) steve_ (Jan 27, 2009 3:31 am) bigmclargehuge (Jan 27, 2009 5:59 am) gagrice (Jan 27, 2009 6:15 am) Dynas (Jan 27, 2009 7:23 am) and 1 more...
#16 of 26 Re: GM & Diesel like gasoline [jimlockey] by moparbad Sep 22, 2007 (1:21 pm)
Replying to: jimlockey (Sep 22, 2007 7:26 am) GM lies lies and lies when it comes to diesel cars. They are scared to death of diesel cars and what Europe is doing with them.   Did you know that Vauxhall is part of GM? How about Opel? They sell a heck of a lot of diesels. Did you know that Cadillac sells diesels (in Europe)? Did you know that GM Daewoo in Gunsan Korea manufactures of 250,000 1.5L and 2.0L diesels a year?   GM is not scared of diesel cars, GM simply believes they are not needed to succeed in the US market.

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