RE: Choke as an engine brake? (fwd)

["Stegmann, Steve" <Steve.Stegmann@domain.elided>]

Tom,

Well... Lets' see.

You need to add the following code to the Projection Controls.

	if (throttle_position() == CLOSED)
            {
                  if(engine_rpm() > IDLE )
                  {
                       if(Jake_brake_switch() == ON)
                       {
                            close_jake_valve();
                            set_fuel_injector_on_time(0.0);
                            set_throttle_valve(FULL_OPEN);
                       }
                  }
            }

I haven't figured how to modify the Pro-Jection software at this level yet.

You'd have to make the exhaust valve, and the relief valve.  Give me a lathe
& mill and I can make them for you.  You'd have to limit the exhaust
pressure to about 8 atmospheres, that's all the compression we have.  I'm
not sure the exhaust manifold can take that kind of pressure.  The doughnut.
No, I think we'll have to come up with something else.

Steve

> -----Original Message-----
> From:	Tom Mandera [SMTP:tsm1@domain.elided]
> Sent:	Monday, March 01, 1999 12:08 PM
> To:	Stegmann, Steve
> Cc:	ihc@domain.elided
> Subject:	Re: Choke as an engine brake? (fwd)
> 
> "Stegmann, Steve" wrote:
> > One problem is fuel shutoff. On a diesel with fuel injection, or a gas
> > engine with fuel injection (and access to the programming) it is no
> trick to
> > shut it completely off.  My Aerostar does this on long downgrades.  With
> a
> 
> Hmm.. I've been wanting a Holley ProJection with the laptop controls... 
> 
> > I sort of doubt if the heat riser shuts tight enough to develope enough
> > pressure to do any good.  It also isn't nearly strong enough.  That's a
> lot
> > of force on a 2 inch dia valve.
> 
> <g> I didn't think so!
> 
> So how would one adapt a fitting that would hold the pressure?  Would
> the stock donut gasket even hold up?  I could see a small leak not
> lasting very long (before it became a biggun)..
> 
> -Tom