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Diesels in the News

8144 messages,  Last post on Dec 03, 2009 at 4:39 PM

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#7272 of 8144
winter2 by marsha7
Dec 15, 2008 (1:14 pm)
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At the risk of belaboring a point to death (when has that stopped me before?), if the buying public has deserted the Big 3 because of doors that mount crooked, hoods that won't close, and extra screws or missing bolts, blame the union...if they deserted because the design is boring, blame management...
 
I would think that many people would intentionally buy a boring car but will avoid a car that looks like it was slapped together by duct tape...
 
While the average person probably does not know what the UAW is, they certainly know if the car squeaks, rattles, and closes like a tin can...they may not know "UAW", but they know a POS when they see one, and THAT, IMO, goes to the union labor making the car...
 
As far as making a diesel, the automakers ought to notice the improved mpg from them, stretching our limited petroleum resources even further, while developing fuel cells and other means...hybrid cars will be a problem when it is time to buy a new battery and dispose of the old one...the enviros will go bonkers when they see all those batteries in landfills...be careful what you wish for, you might get it...
 
Belabor on................................................................
#7273 of 8144
Re: winter2 [marsha7] by altair4
Dec 15, 2008 (1:42 pm)
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Replying to: marsha7 (Dec 15, 2008 1:14 pm)

I rent domestic cars (well, let's call them "Big 3" cars, since I don't know where they were actually built) when I travel for work. Bearing in mind that none of them have more than 15,000 miles on them, most of them have been built reasonably well. No rattles to speak of, nothing seemingly falling off. So based on your comments, I guess I can't blame the UAW for that.
 
Design-wise - jeez, some of these vehicles have questionable esthetics, at least to my eye. The interiors lack some ergonomic details. Why is the radio so far away? Why is the onboard computer information button so far away? Why won't the outside mirrors adjust enough outward so I don't have any blindspots? Why are those mirrors so small and poorly shaped? So, I guess the reason I haven't owned a "Big 3" car in over 20 years falls on the management.
 
So tell me again what they're going to do with the taxpayer money to fix the design issues that I perceive as deal-breakers for me?
#7274 of 8144
Re: gagrice [winter2] by gfr1
Dec 15, 2008 (6:00 pm)
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Replying to: winter2 (Dec 15, 2008 12:50 pm)

Management can be corrected or dealt with. UAW? -- No way!! If the company gets better, UAW wil taked it right back down, to get theirs!
#7275 of 8144
altair by marsha7
Dec 15, 2008 (6:29 pm)
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"So tell me again what they're going to do with the taxpayer money to fix the design issues that I perceive as deal-breakers for me? "
 
I wish I knew..................
#7276 of 8144
Re: Diesel Fuel in the news [winter2] by larsb
Dec 16, 2008 (6:53 am)
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Replying to: winter2 (Dec 15, 2008 12:45 pm)

Hybrids are not very much more complicated that the BlueTec system.
 
I read a description of the system and just the basics were about 6 pages long.
 
Most of the "complication" of a hybrid is just computerization.
 
The BlueTec system also takes a lot of hardware and a complicated computer to do it's bidness.
 
I'm all for more BlueTecs and more hybrids on the road. Complicated cars are the present and the future. There is no going back now.
 
"Complication" can no longer be considered a negative criticism.
#7277 of 8144
Re: Diesel Fuel in the news [larsb] by gagrice
Dec 16, 2008 (11:11 am)
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Replying to: larsb (Aug 01, 2008 12:30 pm)

"Complication" can no longer be considered a negative criticism.
 
How about COMPLEXITY decreases longevity further perpetuating the throwaway mentality of our consumerism. The more to go wrong the higher the cost of maintenance after the warranty. The more likely a person will dump it for a new car. Maybe good for the economy, bad for the environment.
#7278 of 8144
Re: Diesel Fuel in the news [gagrice] by larsb
Dec 16, 2008 (12:32 pm)
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Replying to: gagrice (Dec 16, 2008 11:11 am)

No, not changing my mind.
 
Complexity is the future of cars. When all cars have it (and the REALLY GOOD ones already do) then it cannot be called a negative.
 
It is then called "status quo."
#7279 of 8144
Re: ... Diesel Design Thoughts [winter2] by roland3
Dec 17, 2008 (7:22 am)
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Replying to: winter2 (Nov 30, 2008 9:53 am)

... A picture is worth a thousand words. In one of the links Winter provided there is an image of a multiple pulse injection. I never doubted the value of high pressure and many fuel pulses but this explains the why. Many small pulses of fuel never reach the boundary layer and or the cylinder walls or head. This causes them to ignite in the much better areas of the combustion chamber/process. Also and maybe more importantly, raw fuel in cold areas (relatively), causes SOOT.
..
... I really hope these new systems by Bosch, Delphi and Green Diesel Corp and ???, will eliminate the need for particulate traps, that I am close to calling a failure.
#7280 of 8144
Re: Diesel Fuel in the news [larsb] by winter2
Dec 17, 2008 (12:25 pm)
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Replying to: larsb (Aug 01, 2008 12:30 pm)

Complicated drive systems with power splitting devices (read Prius and others) are a small nightmare. There is no simplicity here. Too many moving parts, too much software and too much computer control to make it work properly which it does not do under some conditions.
 
Blue Tec does take extra hardware and some extra software. Six pages for the basics is not so bad. I wonder how many pages cover the basics for a hybrid like the Prius or others like it. The computer used to control Blue Tec is not as messy as you make it out to be.
#7281 of 8144
Re: ... Diesel Design Thoughts [roland3] by winter2
Dec 17, 2008 (12:36 pm)
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Replying to: roland3 (Dec 17, 2008 7:22 am)

I think DPF is here to stay for now. More injection pressure and more pulses will be required to atomize fuel further than already occurs.
 
A big issue is fuel quality, or lack of fuel quality. Domestically, the cetane is too low and there are too many aromatic compounds in domestic fuel that contribute to particulate formation. A higher cetane would help reduce particulate as fuel would ignite more readily and burn more cleanly. Removing aromatic compounds would reduce the energy content of the fuel a little, but would help reduce PM formation and some of the other nasties that are formed when aromatic compounds are burned.
 
DPF requires little or no maintenance as I understand it. A drive at highway speed for several minutes usually does the job of clearing them.

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