Tracy Crook wrote:

On the knock sensor, I was hoping that the J & S system mentioned would
already have the DSP done and have an output that went active for some
period of time whenever it detected engine knock.  It might take a

complete

re-design to add enough processing power to the EC2 to discriminate the
knock pulses from normal engine noise.  I've never personally looked

at the

output of a knock sensor under actual operating conditions so I

don't know

how big a job this is.  I'm not up for a re-design now so all signal
processing will have to be done external to the EFI.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

The human brain is a superb real time audio signal processor.

Paul Lamar

   Yeah- if you couldn't sort out that tiger's footfall from
the background noise - out of the gene pool!

Bill
Long EZ builder & pilot
mechanical engineer

 marc wiese wrote:

OK, guys, a couple of points here about Knock and The Rotary Engine-
1. It happens faster than you can humanly react
2. It is usually catastrophic-a seal breaks
3. Unless the reaction at "incipient knock" (a hint of the real knock about
to happen) is instanteous, you are at #2 again
4. Get some background from the rotary racers and high performance people
-they have a lot of experience with this situation.

As long as you are not "pushing" the engine (turbo), don't get a load of
bad gas, or have a cool day at the track, maybe you can "forget about it!"
J&S has done the DSP. And, it can be "over-ridden" by external switchable
inputs, however, that is probably when you need it most.

If you blow a seal anytime, your power will probably drop more than the
retard amount would have caused.
Testing is everthing.
Marc Wiese

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