Help wanted finding Inlet runner pressure vs crank angle graphs
Help wanted finding Inlet runner pressure vs crank angle graphs
(OP)
I'm trying to find data (graphs, tables etc) that show the pressure in the inlet runner against crank angle. Preferably a whole lot of pics/tables showing the effect that different modifications, different rpm etc have on the wave form.
Particularly interested in high rpm multi-valve un-boosted applications and the effects of helmholtz tuning but all knowledge is good knowledge so i'll look at it all.
An example of what i'm looking for is
ht tp://www.t eam-integr a.net/sect ions/membe rs/images/ 2f90dcc7-0 3aa-4ca0-a fe7-d1d475 5d9e1d.jpg
So if you know of any good sites/books please post links/references.
TIA
Particularly interested in high rpm multi-valve un-boosted applications and the effects of helmholtz tuning but all knowledge is good knowledge so i'll look at it all.
An example of what i'm looking for is
ht
So if you know of any good sites/books please post links/references.
TIA





RE: Help wanted finding Inlet runner pressure vs crank angle graphs
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
Our experience was these are very difficult measurments to make and properly relate to crank phase and absolute values. That was about a decade ago, what are people during currently?
thanks
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
Making measurements like that would be a doddle using microphones and the analysis gear in an NVH lab - its exactly how we used to invesitgate intake tuning, 20 years ago.
As SG said, any 1D code could do it - in fact you can get a long way in Excel or whatever, modelling it in 1 degree steps. I made a single runner model for a tapered tube into the plenum, for example, to examine how that affected the width and height of the bump in the VE vs rpm graph.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
I don't suppose that excel file is floating about on the net at all is it? :)
SG: i'm aware this is relatively simple to model, i was more interested in looking at real world graphs and seeing what sort of waveforms actually occur in the real world. Part of the problem is that modeling them requires a lot of data that takes a bit of time to collect/measure, and for now I am more interested in getting a general feel for what changes cause which effects.
Thanks to all for their contributions.
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
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Otherwise download one of the codes and play. You'll be surprised how easy they are to set up and get meaningful & representative results from.
RE: Help wanted finding Inlet runner pressure vs crank angle graphs
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.