It is best to allow the injector pump to supply a small amount of fuel to the
cylinders to prevent gaulding. The electrical connection to the injector pump
simply turns on the brake.
I once drove a truck a short distance(to unload) with a injector line in
two. Ruined that sleeve and piston.
"A. Mehlhorn" wrote:
> Richard Notton schrieb:
> >
> > ----- Original Message -----
> > From: "Jim Newton" <jnewton@laurel.com>
> > To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> > Sent: Friday, October 05, 2001 5:45 AM
> > Subject: [MV] "Jake Brakes" Possible on an M35?
> >
> > Its simpler than you think, just a butterfly valve in the
> > exhaust manifold usually operated by an air cylinder from
> > the vehicle brake supply.
>
> Korrekt.
>
> > It is the nature of a diesel injection pump governor that
> > no fuel is injected when the revs are higher than the demand
> > from the "gas" pedal, when you lift off on a diesel there is
> > no fuel injected until the engine slows to the set idle revs.
>
> Not correct. The exhaust brake has usually a connection to the
> injection pump. Most times another small air cylinder switches
> the injection pump to "cut off" position. So as long as the
> butterfly valve in the exhaust pipe is closed, the injection
> pump will deliver no fuel to the cylinders.
>
> Without this "cut off" device, the injection pump will always
> deliver the amount of fuel which is needed for idling speed.
> Even this small amount of fuel will produce big clouds of
> smoke, when the exhaust valve is closed. (The exhaust valve
> is never completly close, there must be always a small bypass)
>
> The butterfly valve is not located in the exhaust manifold,
> it is located in the exhaust pipe around 1 meter (yard) behind
> the engine. At that location the exhaust gases are colder and
> the butterfly valve lasts longer.
>
> Best regards
> Andreas
>
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This archive was generated by hypermail 2b29 : Fri Dec 07 2001 - 00:36:24 PST