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OT Multi Valved Engines
- Subject: OT Multi Valved Engines
- From: speedyterp@hotmail.com (Chris Boggs)
- Date: Thu, 19 Dec 2002 18:11:07 +0000
<html><div style='background-color:'><DIV>
<P>Jason,</P>
<P> </P>
<P> I have been doing some reading and this is what I have found: "Two general approaches are used to create swirl during the induction process. In one, the flow is discharged into the cylinder tangentially toward the cylinder wall, where it is deflected sideways and downward in a swirling motion. In the other, the swirl is largely within the inlet port: the flow is forced to rotate about the valve axis before it enters the cylinder." Heywood, 'Internal Combustion Engine Fundamentals'.</P>
<P>From what I understand swirl requires alot of force acting on the intake flow to create a sufficient amount of initial angular momentum. Opening on valve before the other does not do much. But I might be wrong. I will check with some of my Prof. and get back to you. Pluss I need the break from stuyding for finals!</P>
<P> </P>
<P>Chris <BR><BR><BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV>>From: "Jason Adams" <ROCLIST@ACCESSCONSULTING.CA>
<DIV></DIV>>To: "T Berk" <TBERK@MINDSPRING.COM>,"Scirocco List" <SCIROCCO-L@SCIROCCO.ORG>
<DIV></DIV>>Subject: Re: OT Multi Valved Engines
<DIV></DIV>>Date: Thu, 19 Dec 2002 09:37:15 -0800
<DIV></DIV>>
<DIV></DIV>>nah, I was just curious...
<DIV></DIV>>
<DIV></DIV>>Jason Adams
<DIV></DIV>>Fahrvergnugen Forever! ;)
<DIV></DIV>>84 rocco 16v
<DIV></DIV>>93 320i
<DIV></DIV>>98 Z71
<DIV></DIV>>
<DIV></DIV>>----- Original Message -----
<DIV></DIV>>From: "T Berk" <TBERK@MINDSPRING.COM>
<DIV></DIV>>To: "Scirocco List" <SCIROCCO-L@SCIROCCO.ORG>
<DIV></DIV>>Sent: Wednesday, December 18, 2002 8:12 PM
<DIV></DIV>>Subject: Re: OT Multi Valved Engines
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>> > Dan wrote:
<DIV></DIV>> > >
<DIV></DIV>> > > On Wed, Dec 18, 2002 at 11:39:45AM -0800, Big Kid wrote:
<DIV></DIV>> > > >
<DIV></DIV>> > > > one needs open to get air/fuel in, then both need to be closed for
<DIV></DIV>>firing
<DIV></DIV>> > > > then one opens to remove the burnt gas. I'm sure you can figure out
<DIV></DIV>>which
<DIV></DIV>> > > > does which.
<DIV></DIV>> > >
<DIV></DIV>> > > That's not what he was asking. He wanted to know, given 2 intake
<DIV></DIV>>valves,
<DIV></DIV>> > > does one of the intake valves open before the other, so that the
<DIV></DIV>>incoming
<DIV></DIV>> > > fuel/air charge is given a "swirl" as it enters the combustion chamber?
<DIV></DIV>> > >
<DIV></DIV>> > > Dan
<DIV></DIV>> > >
<DIV></DIV>> >
<DIV></DIV>> >
<DIV></DIV>> > It's almost a given that the two intakes (at least) are staggered to
<DIV></DIV>> > allow for an almost square wave in terms of cam profile. Think of it as
<DIV></DIV>> > it opens fast, stays open long, closes fast. A little swirl in this case
<DIV></DIV>> > would be an added benefit.
<DIV></DIV>> >
<DIV></DIV>> > I can almost guarantee a little time with goolge.com will turn up some
<DIV></DIV>> > better results than my rantings & ravings.
<DIV></DIV>> >
<DIV></DIV>> >
<DIV></DIV>> > TBerk
<DIV></DIV>> > want me to look?
<DIV></DIV>> >
<DIV></DIV>> > _______________________________________________
<DIV></DIV>> > Scirocco-l mailing list
<DIV></DIV>> > Scirocco-l@scirocco.org
<DIV></DIV>> > http://neubayern.net/mailman/listinfo/scirocco-l
<DIV></DIV>> >
<DIV></DIV>>
<DIV></DIV>>
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