Quote:
Originally Posted by pgfpro
I couldn't help wondering what is would take to have a separate, very small, injection system for the pre chambers?
This is superior to getting a richer mixture into the chamber via intricate in (main) chamber aerodynamics is it not pgfpro?
But it also occurs to me that the chamber has to be exhausted of burnt gasses so there's air for the fuel, so perhaps not? Yes to have a active pre-chamber would be awesome but still haven't figured it out yet?
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I assume its the finding and fitting of 4 micro injectors that's the issue?
And why bother if you still have to 'blow over the bottle neck' to scavenge the exhaust and get fresh air in.
How about these 2 ideas:
For both ideas,
the main idea is; Instead of 4 micro injectors you have 1 small injector into a small manifold that supplies both fuel AND air to all the pre-chambers, via small, (injector size?), plumbing.
The manifold might contain compressed air, compressed to somewhat over whatever pressure the turbo is pushing at the time.
From there; 4 micro induction ports, (aka; thin pipes) that go to the pre-chambers via solenoid valves,
pretty much like this guy is doing to actuate his DIY FreeValve System.
A question is; will the solenoid valves handle the pressure of combustion, or will it be necessary to also add one-way valves..? (and what/where to get them)
The other (better?) option:
Separate, cam type driven piston pumps that pump air/fuel from the Micro Manifold, at the correct time/timing.
Piston compressors already contain the desired/required one-way valve that would also prevent blowback during compression and the main combustion event.
Perhaps a diesel injector pump might be modded into an 'air' pump..?
Both should exhaust the burnt gasses more completely than the 'bottle neck blow' method, and ends the micro injector search.
The other thing (I've just realized) about a low volume 'Micro Manifold' is you can inject anything at any ratio/s as it's completely independent of the main mixture!
As it only requires small volumes, the injection of exotic gasses like NOS, Hydrogen, Ozone, etc-etc, possibly produced onboard, is more feasible, as is cooling the mixture with the aircon if necessary.
(Now that I think about it; injecting liquid fuel/s before the small compressor pump/s will probably result in complete vaporization, negating the need for possibly having to devise an agitator of some sort in the micro manifold)
Just thinking outside the box...hopefully!?
