Interesting thread.
One possible solution to the trade off between larger battery packs for longer range and the weight penalty associated with them is the use of inductive power transfer.
While this is not practical for typical automotive use, it could work very well for a bus service due to...
If components for the silvertop are a problem we have them in abundance down here in New Zealand. Very reliable engine, not bad on fuel but do tend to use a bit of oil.
They were sold new in only japan and south africa I believe, but due to the sale of used japanese imports are very common in...
I've worked in the personal mobility field (wheelchairs and mobility scooters) in the past and here a few things to keep in mind.
As Greg Locock said, do you really need petrol? and if you are going petrol why bother with the electric side of things?
From the electric side of things electric...
Even older non traction controlled vehicles had accelerometers for the ABS system, however they often only had a longitudinal axis sensor. Newer systems include lateral acceleration and yaw rate.
Steering angle input sensor - the weight transfer as the driver tries to swerve around whatever got...
motorsportdesign: If you use excel i have put a file up at
http://cronik.orcon.net.nz/files/Valve%20Motion.xls
that contains the (hopefully) correct formulas.
Plug your data in and redo the charts and you should be away.
I haven't used any particular units so you will probably need to scale...
Thanks for your posts Greg. I'll check out the NASA/LARC server tomorrow.
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...
McDowra's description of how the system works appears to be correct:
New systems such as the HEUI (Hydraulically actuated, Electronically controlled, Unit Injector) are currently being used on several applications in all areas especially automotive. The HEUI System develops injection pressures...
The link below has the formulas.
Valve velocity ==> Three point rule for f'(x)
Valve acceleration ==> Three point rule for f''(x)
for jerk apply the f''(x) above to the velocity values instead of the position values.
h= increment
http://math.fullerton.edu/mathews/n2003/NumericalDiffMod.html
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...
Thanks guys, i'll have a read and a think.
I was aware of the importance of not tapering the journals and will be keeping a very close eye on this. Hopefully the crank grinder returns it with a good finish and i wont have to spend much time improving the finish. I get the feeling by the end of...
The only way Ford is likely to part with that information is if you convince them they stand to make a large profit from some idea of yours, and even then you will have to sign a NDA that will give them your wife, your life savings, your first born child and your testicles if you try to do...
Just in the process of rebilding a toyota DOHC 1.6L motor and i'm thinking about how i can make this engine run a tad smoother and quieter. One of the things i was looking at was improving the surface on the cam bearings and journals and tightening up the clearances.
Is there a point where the...
