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01-20-2007, 02:07 PM

jobst.brandt@stanfordalumni.org hatte geschrieben:

> Peter Chisholm writes:
>
>>>> Isn't the RX-8 a rotary engine? And I owned a RX-2..2 plugs per
>>>> rotor, btw, not one.
>
>>> They are both in the same place and fire at the same time. Putting
>>> more of them there does not move the "combustion chamber" away from
>>> that hot spot.
>
>> I guess my point was the reference to how "Wankel' engines are both
>> dead and use 1 spark plug per rotor... but not dead and use 2...
>
> So if we used +4 spark plugs, it would have eight by your logic. It's
> not the number of gaps but that there is only one ignition point. I
> suppose the adverse shape of the combustion chamber made this design.

Not being an expert in the design of combustion engines I still can't
see why it should not be possible to redesign the engine with multiple
spark plugs and multiple injection nozzles for direct injection. This
might solve some of the problems inherent in this design. Technology
has evolved since the time of Wankel and the concept might well profit
from the more recent progress in conventional engines.

> So why do you suppose there aren't a wide variety of small or large
> cars offered with these engines?

Well, the automotive industry is conservative and has good reasons to be
so. So why there are no two-stroke engines with direct injection in
small cars? This technology is very interesting for low cost and low
weight vehicles. Still no major company sells it.

x'post rec.bicycles.misc,rec.bicycles.tech
follow up to rec.bicycles.tech

Günther

01-20-2007, 02:07 PM	#108 (permalink)
Günther Schwarz Guest Posts: n/a	Re: OT Interesting video jobst.brandt@stanfordalumni.org hatte geschrieben: > Peter Chisholm writes: > >>>> Isn't the RX-8 a rotary engine? And I owned a RX-2..2 plugs per >>>> rotor, btw, not one. > >>> They are both in the same place and fire at the same time. Putting >>> more of them there does not move the "combustion chamber" away from >>> that hot spot. > >> I guess my point was the reference to how "Wankel' engines are both >> dead and use 1 spark plug per rotor... but not dead and use 2... > > So if we used +4 spark plugs, it would have eight by your logic. It's > not the number of gaps but that there is only one ignition point. I > suppose the adverse shape of the combustion chamber made this design. Not being an expert in the design of combustion engines I still can't see why it should not be possible to redesign the engine with multiple spark plugs and multiple injection nozzles for direct injection. This might solve some of the problems inherent in this design. Technology has evolved since the time of Wankel and the concept might well profit from the more recent progress in conventional engines. > So why do you suppose there aren't a wide variety of small or large > cars offered with these engines? Well, the automotive industry is conservative and has good reasons to be so. So why there are no two-stroke engines with direct injection in small cars? This technology is very interesting for low cost and low weight vehicles. Still no major company sells it. x'post rec.bicycles.misc,rec.bicycles.tech follow up to rec.bicycles.tech Günther