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cpayne(at)joimail.com
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 Posted: Wed Nov 14, 2007 3:31 am Post subject: Gasolines and modern engines |
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Brian wrote:
>
> > My gut feeling is, if "higher quality" gasoline had a lot more C=C
> (double) bonds (and therefore more energy), we would have to readjust
> our carburetors when we switch fuel in order to get a proper mixture.
> Since we don't ...
>
Brain, oops, er ah Brian. Sure hate to see you lose sleep over gasoline chemistry. For modern auto engines, the engine's sensors and computer adjust the engine to whatever energy level is required. Since the computer is programmable, we now have multi-fuel engines that "adjust" to preset limits based on what effective energy is being realized. I have one of those E85/no-lead 87 octane engines in my truck.
The Huosai carb has a variety of fuel and air jets to make manual adjustments as well as a cockpit "mixture" lever that often gets neglected by the guy in the cockpit. The M-14P automates this somewhat with a ground adjustable aneroid chamber that autoleans...WW-II technology.
Now concentrate on a full FADEC system for the Huosai/M-14P and you will have something worthy of losing sleep over :<)
Craig Payne
cpayne(at)joimail.com (cpayne(at)joimail.com)
[quote][b]
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brian-1927(at)lloyd.com
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| Posted: Wed Nov 14, 2007 10:36 am Post subject: Gasolines and modern engines |
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On Nov 14, 2007, at 3:28 AM, Craig Payne wrote:
| Quote: |
Brian wrote:
>
>
> My gut feeling is, if "higher quality" gasoline had a lot more C=C
> (double) bonds (and therefore more energy), we would have to
readjust
> our carburetors when we switch fuel in order to get a proper
mixture.
> Since we don't ...
>
Brain, oops, er ah Brian. Sure hate to see you lose sleep over
gasoline chemistry. For modern auto engines, the engine's sensors
and computer adjust the engine to whatever energy level is
required. Since the computer is programmable, we now have multi-
fuel engines that "adjust" to preset limits based on what effective
energy is being realized. I have one of those E85/no-lead 87 octane
engines in my truck.
|
Yes, I am aware of that but was focusing on the technology found in
our aircraft. And it isn't so much energy being released as just
ensuring a proper mixture, something the simple O2 sensor can do for us.
| Quote: | The Huosai carb has a variety of fuel and air jets to make manual
adjustments as well as a cockpit "mixture" lever that often gets
neglected by the guy in the cockpit. The M-14P automates this
somewhat with a ground adjustable aneroid chamber that
autoleans...WW-II technology.
|
Yes, but you will note that the setup and adjustment procedures for
the carb on a flow bench do not change their settings and procedures
for different grades of gasoline.
| Quote: | Now concentrate on a full FADEC system for the Huosai/M-14P and you
will have something worthy of losing sleep over :<)
|
It isn't hard to do. I have been experimenting with various
microcontrollers and a FADEC would be relatively simple. I just don't
think that there is a big enough market to justify its development. I
would rather spend time in the air moving levers (well, some levers)
than on the ground moving bits.
--
Brian Lloyd 3191 Western Drive
brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
— Antoine de Saint-Exupéry
PGP key ID: 12095C52A32A1B6C
PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
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