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## RE: [Algorithms] Car engine behaviour

 RE: [Algorithms] Car engine behaviour From: Tom Forsyth - 2006-04-28 08:35:30 ```> I found this link: http: > //lancet.mit.edu/motors/motors3.html That's a DC electric motor. Totally different characteristics to a = piston engine! This one's quite good. By an _astonishing_ coincidence, their chosen modelling target is an R34 RB26DETT :-) http://www.welltall.com/ymc/discovery/car/shiftpt.html You know how I was saying most engines have fairly flat torque curves? = Well, this is what happens when you add a turbo - Mount Vesuvius appears on = your dyno chart. I did notice his approximation is pretty ropey in one fairly important respect - torque does not go in a straight line from zero at standstill = to peak. The official torque line there goes from 200NM@... to 400NM@... That line doesn't go through the origin! Doing an image search for "torque curve" gives you a really good = selection of torque curve shapes. You can see that within the useful range, normally-aspirated cars are basically a rounded hump. I think I was on = the small side with 10% - maybe 30% or so. On the other hand, cars with = turbos do the Everest thing. TomF. > -----Original Message----- > From: gdalgorithms-list-admin@...=20 > [mailto:gdalgorithms-list-admin@...] On=20 > Behalf Of Madoc Evans > Sent: 27 April 2006 07:25 > To: gdalgorithms-list@... > Subject: RE: [Algorithms] Car engine behaviour >=20 >=20 >=20 > Can anyone come up with a simple formula for an approximate torque=20 > curve given some basic input parmeters? I found this link: http: > //lancet.mit.edu/motors/motors3.html which seems to suggest a linear=20 > relation between "stall torque" and "no load speed" but I'm not sure=20 > this is the kind of thing I need in my case. I'm not sure the=20 > terms are=20 > pertinent, even. Any magic approximations like the way we use=20 > exponentiation and Gaussians for so many things? >=20 > Thanks, >=20 > Madoc >=20 >=20 > ------------------------------------------------------- > Using Tomcat but need to do more? Need to support web=20 > services, security? > Get stuff done quickly with pre-integrated technology to make=20 > your job easier > Download IBM WebSphere Application Server v.1.0.1 based on=20 > Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&; dat=3D121642 _______________________________________________ GDAlgorithms-list mailing list GDAlgorithms-list@... https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list Archives: http://sourceforge.net/mailarchive/forum.php?forum_id=3D6188 ```