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 Variable Compression Ratio
Author Message
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 3:37 am

http://www.popularmechanics.com/automotive/auto_technology/1266656.html

Clever buggers. Very interesting.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 3:38 am

years old, keep up JB!

2000, I thought it was the late 90's ahh well.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 3:40 am

Really? They aint in production are they?
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 3:48 am

nah not yet.

Need to remember its not the easiest thing to do, get a hinged block, make a bellow that is robust enough to withstand constant flexing and heat cycles.

It also has to last 150k.

Not cheap or easy.

TBH its to much hassle
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 3:49 am

making the head/block sounds a pig. still, no head gasket to go.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 3:51 am

porsche etc have made engines with the barrels etc welded to the head for years. Not the easiest thing to case right enough, I can see lapping in valves beign awkward!
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 3:52 am

lol yes!

i like it.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 3:53 am

lol yes!

i like it.

i found it linked from here...

www.eng-tips.com

i look at the automotive sections....clever bastards on there.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 3:58 am

looking now. They seem to be making a bit of a drame out of turboing a honda twin.

Not the smoothest but its really not that much of an issue!
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 4:07 am

thats a poor topic to pick to start with. Smile
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 4:11 am

flicked through a few. In the body engineering bit now. Nopt to bright some of them. To much time in uni not learning anything and not enough hands on experience.
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 4:15 am

i havent looked in that section...seems to be all american anyway.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 4:16 am

austrialian's feature heavily...
JB
Mr Quoter-vator

Joined: 16 Feb 2004
Posts: 7405

Posted: Thu Jun 16, 2005 4:19 am

bah they all talk the same.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 4:24 am

throguh their arse? I agree
david3533
Site Subscriber

Joined: 02 Oct 2004
Posts: 1575

Posted: Thu Jun 16, 2005 4:45 am

I hink saab are working on this at the moment. I'm sure they have an engine running with this design.
Chris H
Forum Moderator

Joined: 02 Mar 2004
Posts: 19978

Posted: Thu Jun 16, 2005 5:05 am

its the saab engine its talkigb about Dave.

There was a video of it running on the web about 3/4 years ago. Hooked up to an engine dyno. Cool to watch, contstant running its normal, they open up the throttle the note changes as the charger kicks in and the deck height changes.
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