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post #1 of 14 (permalink) Old 08-25-2019, 06:23 AM Thread Starter
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Harley patents new engine design

https://www.motorcycle.com/mini-feat...ne-design.html


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post #2 of 14 (permalink) Old 08-25-2019, 07:07 AM
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Interesting, but the last sentence is very interesting indeed , one I had not herd yet ..

They did say some time ago , that there were some things they would not get away from with the engines that are part of Harley heritage .. Like V Twin and pushrods ..

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post #3 of 14 (permalink) Old 08-25-2019, 07:35 AM
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We will see what happens and when.

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post #4 of 14 (permalink) Old 08-25-2019, 08:20 AM
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Time for me to add to my collection of air cooled bikes before I can no longer do so.


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post #5 of 14 (permalink) Old 08-25-2019, 12:40 PM
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Quote:
Originally Posted by twowheeladdict View Post
Time for me to add to my collection of air cooled bikes before I can no longer do so.
Ya, I would say the days of the air head are numbered. But I wouldn't start saving up for this just yet. Corporations patent pretty much everything they try out these days, even the stuff that they know they wont produce. And based on the pushrod angles as shown, I don's see that being an economical VTwin lay out. But a modular head for a 1-2-3-4 cylinder inline would work, more so as the cylinder count went up and justified the two camshafts. It could also work with actuators in place of the pushrods, which is the cutting edge at the moment.

That valve drive setup is not a new concept, it looks like a Detroit 4 valve setup they used on the old two stoke diesels.

All in all, Me like.

Nice set of low mass rockers, with a short reach. And the bridge looks to be fairly light.

If that canister where the rocker contacts the bridge is a auto lash adjuster, then me not like. Looks an awful lot like a dual valve split lift set up Delphi screwed the pooch on years ago. And we all know that the MoCo ends up with a lot of Delphi cast offs.


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post #6 of 14 (permalink) Old 08-27-2019, 09:54 AM
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Originally Posted by Thermodyne View Post
Ya, I would say the days of the air head are numbered. But I wouldn't start saving up for this just yet. Corporations patent pretty much everything they try out these days, even the stuff that they know they wont produce. And based on the pushrod angles as shown, I don's see that being an economical VTwin lay out. But a modular head for a 1-2-3-4 cylinder inline would work, more so as the cylinder count went up and justified the two camshafts. It could also work with actuators in place of the pushrods, which is the cutting edge at the moment.
inline 4 with pneumatic valves (or even dc motors) sounds like a real screamer.

imagine the redline they could achieve without pushrods.

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post #7 of 14 (permalink) Old 08-27-2019, 10:24 AM
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Originally Posted by Thermodyne View Post
Ya, I would say the days of the air head are numbered. But I wouldn't start saving up for this just yet. Corporations patent pretty much everything they try out these days, even the stuff that they know they wont produce. And based on the pushrod angles as shown, I don's see that being an economical VTwin lay out. But a modular head for a 1-2-3-4 cylinder inline would work, more so as the cylinder count went up and justified the two camshafts. It could also work with actuators in place of the pushrods, which is the cutting edge at the moment.

That valve drive setup is not a new concept, it looks like a Detroit 4 valve setup they used on the old two stoke diesels.

All in all, Me like.

Nice set of low mass rockers, with a short reach. And the bridge looks to be fairly light.

If that canister where the rocker contacts the bridge is a auto lash adjuster, then me not like. Looks an awful lot like a dual valve split lift set up Delphi screwed the pooch on years ago. And we all know that the MoCo ends up with a lot of Delphi cast offs.
I concur, and with a name like thermodyne(MACK TRUCK) I appear to have a classically trained diesel mechanic like myself amongst us, Bravo!
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post #8 of 14 (permalink) Old 08-27-2019, 12:24 PM
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Originally Posted by glidedawg View Post
I concur, and with a name like thermodyne(MACK TRUCK) I appear to have a classically trained diesel mechanic like myself amongst us, Bravo!
To set the record straight, I'm not a trained diesel tech. I have an ASE cirt on the wall, but that was just from what I picked up over the years. The name came from my personality having a narrow safe operating band, much like a Thermodyne engine.
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post #9 of 14 (permalink) Old 08-27-2019, 12:27 PM
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Originally Posted by Little Wing View Post
inline 4 with pneumatic valves (or even dc motors) sounds like a real screamer.

imagine the redline they could achieve without pushrods.
There are some proof of concepts running for both designs. The electric one claims 50% thermal efficiency when used with variable displacement.

The heads I have see are very tall, but adding a rocker to the system would make it as short as pushrod engines.


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post #10 of 14 (permalink) Old 08-27-2019, 12:52 PM
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Originally Posted by Thermodyne View Post
There are some proof of concepts running for both designs. The electric one claims 50% thermal efficiency when used with variable displacement.
Mr. Customer, it's time for your 10,000 mile stepper motor replacement.
That'll be (4 heads, 2 motors per head @$79.95) $639.60 please lol

they used pneumatic-actuated valves in F1 cars and got 19,000 rpm
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