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M.W.P.
Forums Junkie

Location:
Rocky Mountains, Canada
Registered:
May 2002

Re: PARALLEL Twincharging, lets make it work

Tue, 23 August 2005 09:30

oldcorollas wrote on Tue, 23 August 2005 18:30

MWP, have a read of my last post.. i think i just proved that it doesn't make much difference if you vent to ATM or to after T1...

venting to after T1 makes the actual closing process a little easier i think... hmm, that may all come down to how the valves are actuated, and what 'logic'is used to change their position...

hmmmm also showed that we aren't saving power by recirc.... maybe in that case, just closing T1 would be enough?? but then we have even higher pressure differential across the SC, so we would get some whopping great losses (well more.. imagine each time the lobes opened after pulling vaccum thru, we have 0.6L of 2bar air rushing to greet them...mmm can you say heat!!)

It doesnt really matter where it goes, as long as its before the last compressor.
Yes, it would be wasted energy, but it would only be open for a fraction of a second if done properly.
Most of the control could be done via the turbos wastegate.
The bleed would only be there to remove and small crossover surge.

Quote:

my only concern with laptop is that it is not real time based (unless you did it in linux of course Razz

) and this is something you would not want a half second hang time while bill gates does his shit...

It could be done in Windows quick enough, but yes, i would use Linux.
Even injector timing (much faster than would be required for this) could be done on a windows box if careful.
Comparativley, engine timing stuff is VERY slow compared to what a PC can easily handle.

Quote:

hmm, so we are sort of making a sooper-dooper-EBC then? hmmm.... then again, if we had wastegate actuators, we could just use the EBC's, but i foresee the need to actuate the throttles with no pressure to make actuators work... hrmmm..

Well you could do the actuation stuff with pnumatics if you really wanted Wink

Quote:

well, we would need a stepper for each throttle.. although from comments, maybe a wastegate could easily be used for T2.. so sayy two stepper motors, 90deg max movement, maybe 1 or 2 deg steps? doesn't need to be too fancy.. force?? enough to be able to open/close a valve against a lot of pressure..

Hrm, i would try worm drive geared servo's for this first.

Quote:

in fact, if electronic control of steppers could be set up, then the whole thing with decel and cruise becomes very easy.. you could just set either turbo (for highway) or SC (for city) and things like that.....

Yup, would be pretty cool coming up with profiles for hills driving, city driving, econo, etc, etc.

I wanna hear the cool sounds this engine is gonna make Shocked

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