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Re: How the turbo works
On Apr 22, 2:39pm, David Kavanagh wrote:
> Subject: Re: How the turbo works
>
>
>
> Wastegate spring
> / computer controlled valve
> WASTEGATE / +-----+/ C = A or C = B
> +-------====---/----+ | +------------------------+
> | ---- / | <-> | A +----------------------+^|boost
at
> |push| ---- / +-------+ | <--- |^| open
> |down| ---- +-------+C +----+
|^|throttle
> | \ / ---- | | B +--+v| +------------.-+ +------
> | v ---- | +-----+ | | | > > > > / to
intake>
> |_-----------------_| |v| | ^ +------.------ -----
> /| || | | | | ^ | | |
> diaphram/ | || +---------------------+ ^ | throttle
+------>
> | || < < < < < < < < < < < ^ | to sensor
in
> | | || ^ +---------------------+ ^ | computer
> | | || | | | | | ^ |
> +----- v || | up --+ constant |v| | ^ | Throttle valve
> down || less boost vacuum | | | ^ |
> more boost|| \ |v| | ^ |
> || || | | | ^ |Boosted air outlet
> /|| +----------||--------------+ ^ |
> / || | > > > > ||> > > > > > > > ^ |
> boost regulator / || | ^ +------||------------------+
> +--------+ ^ + || | |
> | | intercooler |v|
> | TURBO | | |
> \ | "AIR | |v|
> -------------+ PUMP" | | |
> AIR INTAKE> > > > > | constant |v|
> ---------+ +--------------+ vacuum | |
> / |^| \ |v|
> |^+--------------------------------+ |
> +------------------------------------+
>
>
Cool picture, but doesn't the wastegate actually bypass the
impellor (rather than the compressor) end of the turbocharger?
In other words, I had the impression that when the wastegate
"released", exhaust gases would go directly to the tailpipe
from the exhaust manifold rather than through the turbocharger.
Regulating the compressor end would seem more direct, though ...
-Arun
--
Arun Rao
Scientist
Pixar
1001 W. Cutting Blvd.
Pt. Richmond, CA 94804
(510)215-3526