Honda'a New Engine

Honda has a new engine that uses the
Atcheson & Topeka cycle (or something like that).

How is the fuel mixed with the air?
What happens when the air/fuel is being forced out
of the cylinder before the intake valve closes?

That is what happens, isn't it?

 

It could be a direct injection(into the cylinder,not the intake plenum)
form of 2-cycle engine. This has been developed for diesel ICEs(internal
combustion engines=ICE)

Any unburned hydrocarbons in todays engines get burned by the catalytic
converter,that may be what's planned for this other type of ICE.
Or part of the exhaust may get fed back into the intake air.(EGR)
Or both.

Just SWAG on my part.

 

You should consider visiting a magazine shop and buying a copy of
Honda Tuning magazine. If you like it, subscribe to it. It's my
guess that there will be an article about the new engine in the
current edition or the next edition.

 

Is that the engine that runs on only 2 cylinders when the RPMs are constant,
like in highway speeds? I read that a while back, seemed interesting,
actually it was printed in a Japanese auto magazine that a friend translated
to me. Sort of the 4-6-8 engine developed by GM in the 70s, or was that the
8-6-4? But I digressed.

I think the ECU shuts off the injector to the unused cylinders, also the
valves are frozen using the same technology of V-Tech, but in reverse.
Supposed the engine gets about 25km/l which equates to about 60mpg.

 

I remember that (although IIRC it was a 4-8 or 8-4). I don't know if it ever
made it into production, though. In any event it faded away, and I never
knew why.

Mike

 

No, it's entirely different.

I changes the valve timing and substantiall increases the
compression ratio.

 

Such an engine is in the Chrysler C300 - at least in the UK.Runs on 4
most of the time, and 8 when you need it.

 

8-6-4, Cadillac, died an ignominious death, very crude control
electronics.

I think the concept has been revived and implemented by M-B, if not
others.

 

Yes, Daimler-Chrysler is using it in their Mercedes, Dodge and Chrysler
brands. Honda is using it as well in some of their V6 engines. For more,
Google for "Cylinder deactivation"

 

Ah, I've had lots of cars with Automatic Cylinder Deactivation. Most of the
time it was all cylinders or random cylinders, though.

Mike

 

How would the compression ratio change if there is no force induction
involved? Maybe your trying to describe the Air to Fuel Ratio, that would
make more sense.

 

My guess is that it is like the engine Toyota uses in the Prius, using valve
timing (particularly late intake valve closing) to change the compression
ratio. The Prius engine has a 13:1 expansion ratio but uses 87 octane fuel.

Mike