RE: Ilmor V4 - more info... nVFRc

If the valves are pneumatically operated, what does the camshaft do?

Wouldn't the control of the valves be accomplished with a crankshaft
position sensor and the engine management computer?

Ed "happy with gear whine" and 1998 VFR 800





"The engines are four-valve, twin-cam designs with gear-driven
camshafts, and the
valves are pneumatically operated."




_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr

I think this means the valve "springs" are pneumatic. Apparently eliminating the "float" inherent at high rpm with traditional springs.



----- Original Message -----
From: Ed Kokosa
To: vfr@xxxxxx
Sent: Friday, October 06, 2006 10:28 PM
Subject: RE: Ilmor V4 - more info... nVFRc


If the valves are pneumatically operated, what does the camshaft do?

Wouldn't the control of the valves be accomplished with a crankshaft position sensor and the engine management computer?

Ed "happy with gear whine" and 1998 VFR 800





"The engines are four-valve, twin-cam designs with gear-driven camshafts, and the valves are pneumatically operated."





------------------------------------------------------------------------------


_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr
_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr

Hello Ed ~

With pneumatically operated valves, the conventional valve springs are
simply replaced with pneumatic (or "air") springs. The camshafts serve the
same purpose as with a conventional setup.

Andy Bertsch
'99VFR800FI/Sargent
Cogito Ergo Zoom
Sidney, Ohio
abertsch1@xxxxxx

Message: 14
Date: Fri, 6 Oct 2006 22:28:40 -0400
From: "Ed Kokosa"
Subject: RE: Ilmor V4 - more info... nVFRc
To:
Message-ID: <200610070228.k972SnuX014097@xxxxxx>
Content-Type: text/plain; charset="us-ascii"

If the valves are pneumatically operated, what does the camshaft do?
Wouldn't the control of the valves be accomplished with a crankshaft
position sensor and the engine management computer?

_____

I am using the free version of SPAMfighter for private users.
It has removed 6564 spam emails to date.
Paying users do not have this message in their emails.
Try SPAMfighter for free now!


_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr

Is that what "pneumatically operated" means, for this engine, and also for
F1 engines? I always thought "operated" meant "operated", i.e., opened and
closed.

So these are mechanically opened, pneumatically closed (although the
mechanical portion also controls the closing rate/position).

Is the pneumatic "spring" closed, or is it subject to a constant (or
varying) pressure created by a pump on the engine?

Ed



_____

From: Andrew Bertsch [mailto:abertsch1@xxxxxx]
Sent: Saturday, October 07, 2006 8:00 AM
To: Ed Kokosa
Cc: VFR Mailing List
Subject: RE: Ilmor V4 - more info... nVFRc



Hello Ed ~

With pneumatically operated valves, the conventional valve springs are
simply replaced with pneumatic (or "air") springs. The camshafts serve the
same purpose as with a conventional setup.

Andy Bertsch



Message: 14

Date: Fri, 6 Oct 2006 22:28:40 -0400

From: "Ed Kokosa"



If the valves are pneumatically operated, what does the camshaft do?

Wouldn't the control of the valves be accomplished with a crankshaft
position sensor and the engine management computer?




_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr

Ed ~

Follow the link below for a cursory explanation of pneumatic valve
actuation. This site doesn't answer all of your questions, but it's worth a
visit nonetheless.
http://www.delwestusa.com/manufactur...tic_valves.asp

Andy Bertsch
'99VFR800FI/Sargent
Cogito Ergo Zoom
Sidney, Ohio
abertsch1@xxxxxx


-----Original Message-----
From: Ed Kokosa [mailto:edk800f1@xxxxxx]
Sent: Saturday, October 07, 2006 9:35 AM
To: 'VFR Mailing List'
Cc: 'Andrew Bertsch'
Subject: RE: Ilmor V4 - more info... nVFRc



Is that what "pneumatically operated" means, for this engine, and also for
F1 engines? I always thought "operated" meant "operated", i.e., opened and
closed.

So these are mechanically opened, pneumatically closed (although the
mechanical portion also controls the closing rate/position).

Is the pneumatic "spring" closed, or is it subject to a constant (or
varying) pressure created by a pump on the engine?

Ed




_____


From: Andrew Bertsch [mailto:abertsch1@xxxxxx]
Sent: Saturday, October 07, 2006 8:00 AM
To: Ed Kokosa
Cc: VFR Mailing List
Subject: RE: Ilmor V4 - more info... nVFRc



Hello Ed ~

With pneumatically operated valves, the conventional valve springs are
simply replaced with pneumatic (or "air") springs. The camshafts serve the
same purpose as with a conventional setup.

Andy Bertsch



Message: 14

Date: Fri, 6 Oct 2006 22:28:40 -0400

From: "Ed Kokosa"



If the valves are pneumatically operated, what does the camshaft do?

Wouldn't the control of the valves be accomplished with a crankshaft
position sensor and the engine management computer?




_____

I am using the free version of SPAMfighter for private users.
It has removed 6564 spam emails to date.
Paying users do not have this message in their emails.
Try SPAMfighter for free now!


_______________________________________________
vfr mailing list
vfr@xxxxxx
For subscription and delivery options:
https://lists.cs.wisc.edu/mailman/listinfo/vfr