On Sat, 17 Dec 2005 16:57:26 -0500, trainfan1
>Puddin' Man wrote:
>> Re: OT?: New cars run on partial cylinders?
>> I pick up the Sun. paper, read a new car "review", sez
>> the machine (I ferget make/model) is designed to run
>> on partial cylinders (i.e. 4 of 8) when on the hiway
>> and at steady speed for quite a while. "Saves gas."
>> "How Dey Doooooooo Dat???"
>> So I'm thinkin', partial cylinders, fuel injection is
>> computer controlled, it just shuts down injection to, say, 4
>> cyls. But the compression ratio might be something like
>> 7.5/1, and that would make for lots of resistance to
>> effective power train performance with non-firing cyls.
>> I don't spend much time keeping up with new auto technology.
>> Is it possible/conceivable/not-a-nightmare that the valve
>> train could be controlled by the 'puter (and no longer
>> purely mechanical)? For partial cylinders, could it hold
>> 1/more valves open for designated non-running cyls? Does
>> anybody know?
>> Better yet, is anyone in a position to evaluate the
>> potential reliability/long-term dependability headaches
>> that might ensue from such "bleeding-edge technology"?
>> Just curious ... 'scuse my lack on knowledge.
>I'm guessing you've never seen a Cadillac V-8-6-4 ?
>Well, that came out 25 model years ago... and didn't last very long.
>Check this overview:
I have seen exactly two of these early Cadillacs in operation.
The first one was owned by an elderly gentleman who always drove the
car in the typical elderly driver fashion for nearly 15 years. The
computer would adapt to driving style and.... Every few months he
would come back because the car was acting "sluggish". We'd clear
the memory, Take it for a rip up the road at full throttle and (as he
would say) it got it's pep back. ;-) cheap & easy "fix"
The idea was way ahead of the technology. Properly maintained even
the early 4-6-8 Caddy's would operate as designed.. It shouldn't be
too problematic now with better oils and electronics.
The other 4-6-8 Cadillac? It came in for a tune-up. Opened the hood
and saw a rats nest of red wire where someone had "fixed" it.....
Never even attempted to touch that one.
Don't worry about this being "cutting edge" technology. ABS started
life in the 1950's, Airbags were in GM cars in the 1970's the 1930's
Deusenbergs had Superchargers and multi valve engines. 1960's
Corvair's had rear mounted air cooled turbo engines (yes, just like
the 1980's Porsches). Fuel cells? 1800's (look up William Grove or
something like that).
America has made a practice of being ahead of the world. This is what
made America great and continues to make America great. It's just a
shame we can't find a solution for the retiree's so Ford, & GM can
start spending engineering dollars again.
If you're concerned about reliability buy a new one after they've been
out a few years, that way you'll have a warranty and the problems the
vehicles encounter will already be solved by the early adopters.