A turbo is a turbo. The wastegate control simply opens the wastegate
on the turbine side, as the boost on the compressor side. The
turbine/compressor assembly spools down, the pressure on the
compressor side (that goes to the intake manifold) drops, the
wastegate control closes the wastegate. repeat. One can delay
the wastegate control opening the wastegate by leaking the hose
that goes from the compressor to the wastegate servo.
> Are there other ways to control wastegate operation on a diesel engine
and if
> someone knows of some information I'd appreciate it if they'd let me
know.
A simple aquarium valve can do the job of leaking to atmosphere
or you can leak back to the intake right after the air flow meter
or whatever other mechanism is used for metering air (if you
leak to atmosphere, you are discarding metered air). More
complex systems include the Saab APC and Greddy Profec.
Note that if you get more boost, you need more fuel too.
I'm not sure of how the injection system work on your
turbo diesel, but it probably has a pressure regulator, right?
In any case, a diesel doesn't have as much problem as
a gas engine with overboost (or so I've been told by a
friend who worked for a truck company).
Ciao,
Francois Dion (francois@hyperreal.org)