[SEL] New Toyota's with old technology

[Bill Brueck]

The term Atkinson apparently has come to refer to a design where the
intake/compression and the power/exhaust cycles are of different
displacement.  It does not refer to the neat arrangement of levers that the
original Atkinson demonstrated.  And the power stroke per revolution.  Big
disappointment!

Thus holding the intake valve open a little longer and robbing part of the
compression stroke produces the same differential in displacement between
the intake and the power strokes. 

B²

507 289 4824

Confusion is a higher state of knowledge than ignorance.


-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of R & M Ingold
Sent: Monday, October 29, 2007 4:06 PM
To: The SEL email discussion list
Subject: Re: [SEL] New Toyota's with old technology

There were two types. The 'Differential' had two pistons in one bore.
It had problems and was followed by the 4 cycles in one turn of the
flywheel. The linkages made each stroke a different lenght. Thus, the intake
stroke was half the lenght of the power stroke. This gave the burnt gas time
to expand and do its work. THAT was the main point of the design. It is
still about the most fuel efficient/power obtained design.
Its drawbacks were the linkage system.
I cannot see how this can be obtained by valve timing!
Hence my asking if there were pictorial details of the later, so called,
Atkinson design.  Hey, maybe there were two Atkinson persons?
The original Atkinson became chief engineer for Crossley after Otto's patent
on the 4 cycle expired.
Reg & Marg Ingold.
Newcastle, NSW, Australia.
randmingold at hotkey.net.au
http://www.oldengine.org/members/randmingold

----- Original Message -----
From: "Bill Brueck" <b2 at chooka.net>
To: "'The SEL email discussion list'" <sel at lists.stationary-engine.com>
Sent: Tuesday, October 30, 2007 7:27 AM
Subject: Re: [SEL] New Toyota's with old technology


What is it about the hybrid cars that makes the Atkinson the engine of
choice?  If it's so good here (by whatever criteria), why don't we see the
Atkinson in other applications?

B²

Bill Brueck
   Chatfield, Minnesota, USA

Confusion is a higher state of knowledge than ignorance.


-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of bdb
Sent: Monday, October 29, 2007 2:20 PM
To: The SEL email discussion list
Subject: Re: [SEL] New Toyota's with old technology

We bought a 2008 Ford Escape hybrid a couple months ago and it definitely is
different. The little gas motor in tandem with the electric motor develops
an unbelievable amount of power to the wheels. The Atkinson engine alone is
a pooch but gets really good mileage. I hope to see one of the Atkinson
engines taken apart someday, hopefully not ours.

Barry

Barry D Buchanan
410 S. Moore
Ottumwa, IA. 52501

When the only tool you own is a hammer, every problem begins to look like a
nail.

----- Original Message -----
From: "Judge Tommy Turner" <lcjudge at scrtc.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Monday, October 29, 2007 11:08 AM
Subject: Re: [SEL] New Toyota's with old technology


Wow, thats a really neat site Bill.  I just saw George's post about the
Escape Hybrid using the Atkinson.   I bet you're right, the first time a
mechanic tears into one of these he's probably thinking "what the heck....".

Tommy Turner
Magnolia, KY


>Great post, Tommy.  I can just see the guys at the local shop scratching
>their heads the first time they see one of these come in the door.  Is this
>used in any other modern application?
>
>For those of you who, like me, needed a refresher on what the Atkinson
>Cycle
>is, take a look at www.keveney.com.  Maybe Matt's a list member, I don't
>remember.
>
>B²
>
>Bill Brueck
>   Chatfield, Minnesota, USA
>
>
>
>

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