Subject: diesel mode
From: ACRE
Date: 3/17/2004, 2:00 PM


That is not to say it cannot be made to run on diesel fuel however.

Paul Lamar

CBarber wrote:

So it could be made to run on diesel fuel but not as a diesel (i.e. by
compression) and still need the spark provided by a plug.  Would this
give
any advantage other than potentially cheaper fuel(or just more of an
intellectual exercise)?  Just curious. TIA.

All the best,

Chris
Houston

Christopher Barber

Barber & Pi, LLP
Attorneys and Counselors at Law
11930 S Sam Houston Pkwy E
Suite 103
Houston, Texas 77089-4755
281-464-LAWS (5297)

"Serving the needs of Senior Texans"

CBarber@TexasAttorney.net
www.TexasAttorney.net <http://www.TexasAttorney.net>

Just cheaper fuel. The BSFC is no better.

Paul Lamar

If you use SmartPlugs, you eliminate the failure mode of the spark plugs -
if
the "glow plug" starts the thing, it should continue to run...

--
-dave
mailto:dave@arb.net
http://arb.net

Not true you need the additional heat all the time or a spark and that is
what is used by Wankel Gmbh. Glow plugs take too much current compared to
a spark. Unless of course you want to mix nitro methane with your diesel
fuel. Kind of EXPENSIVE! :) That should keep the glow plug glowing :)
The problem with glow plugs is you cannot control the exact time of ignition
precisely under all conditions.

Paul Lamar


... unless you control ignition through precisely timed direct injection.
But there are two hitches:  "precisely timed" means you need a more
sophisticated-than-usual ECU, and "direct" means you need a hi-pressure
common rail system.  Both systems are available from automotive
manufacturers that have turbo-diesel models (the best I have seen so far is
BMW's), but they ain't precisely cheap!  Eliminating the hi-voltage system
driving the spark plugs will compensate... hmmm... let's say for 10-20% of
the common rail system cost!  A no-winner, unless you really need it... and
that might well be the case if you want to feed your rotary jet-fuel or
diesel fuel in all conditions.

Francois Badoux

The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.