For the engine techies. Duke engine. Interesting

wasn_me · Guru

For the engine techies. Duke engine. Interesting

aussie_paul · Guru

Thanks Peter, Very interesting.

Aussie Paul. smile

Jaahn · Guru

Hi,

Yes interesting biggrin Seems to be in the hands of a proper engineering team.

If I had a quid for every revolutionary new engine I have looked at over the last 50 years I might be able to buy a new rig hmm However we are still driving the same style, mechanically, of piston engines as when I was first interested in engines. And my bet is we will do so for a while yet. They do not mention pollution standards or the like, which is probably the down fall of the valve-less head design. confuse

Jaahn

PeterD · Guru

Jaahn wrote:
If I had a quid for every revolutionary new engine I have looked at over the last 50 years I might be able to buy a new rig

Yes I put a couple of thousand into the Collins Motor Corporation when they were developing their scotch yoke engine. They had a few running around in cars in Oz but none of the motor corporations were prepared to tool up to produce a better engine so the project died

Woody n Sue · Guru

Very interesting indeed just wait N d see a big oil company will buy it out and shelve it and we will never hear of it again like many before it. We can't have extreme fuel efficiency now can we there's no profit in that for the oil companies .

greyhoundtom · Senior Member

That video was published in July 2012 and obviously nothing new has been heard about it since.

While I sincerely hope I'm wrong it does look like this project is dead in the water. :(

Ondabeach · Senior Member

Ah Google... you're amazing... looks like they're still in business smile

http://www.dukeengines.com/about/

Jaahn · Guru

Woody n Sue wrote:
Very interesting indeed just wait N d see a big oil company will buy it out and shelve it and we will never hear of it again like many before it. We can't have extreme fuel efficiency now can we there's no profit in that for the oil companies .

Hi Woody n Sue,

Not sure why you think that confuse There is nothing in that design as far as I can see that says extreme fuel economy. A small claim about high compression ratios but most modern petrol engines are running close to that now.

I worked in a testing lab that looked at lots of odd and interesting things, not engines, and my observation of the people who had a "new idea" was, they never accepted that it was not actually "new" or good if it was not. Even when the testing went against them they just went else where to find some one who would give them a good glowing report. hmm Just saying !!

I no fan of the big oil companies either. And they are responsible for lots of current cartell behaviour as well as historic stuff. However we cannot get past undocumented urban myths, can we biggrin biggrin

Jaahn

rockylizard · Guru

Gday...

cry would be good to see it still progressing ... however, the most recent 'news' on their website is July 2013 hmm

The website still exists, but wonder if the company still does - and is progressing the project.

Cheers - John

Woody n Sue · Guru

Jaahn Weren't really referring to the duke engine just a comment in general about big oil business

Just look at the price of a barrel of oil now compared to when it was twice that price, seems it has no relevance to the price they can screw us for at the bowser, and I sometimes buy 15,000 litres at a time on the farm so 1 or 2 cent a litre adds up quickly, then burn it in a tractor or harvester at 60 to 90 litres an hour takes even more of the fun out life on the farm .

Peter_n_Margaret · Guru

I suggest that no one will spend billions of dollars to commercialise a new mass production internal combustion engine.
That is not where the future is.

Cheers,
Peter

PeterD · Guru

Woody n Sue wrote:
Very interesting indeed just wait N d see a big oil company will buy it out and shelve it and we will never hear of it again like many before it.

The oil company buying these inventions and shelving them is just a conspiracy theory. You can go back and look at the patents and you will see that they have mostly lapsed, ceased or expired. The scotch yoke engine and other things developed by the Collins Motor Corporation were not taken up by others so the company just let them go http://www.ipaustralia.com.au/applicant/collins-motor-corporation-limited/patents/ The products were good but no major manufacturer was prepared to tool up to produce them.

Jaahn · Guru

Hi smile

I don't profess to be an expert on engines but have followed most "new" developments, been to some seminars on the subject, and worked on lots of old and new engines. And was a member of a trade organisation for years. blankstare

When people give general opinions on engines from press reports or carefully released advertising for new product investment, I am surprised at the people who seem to be taken in. The car manufacturers spend multi millions on engine development currently and would take up a new engine tomorrow if it had a perceived benefit. They have over the years bought patent rights to interesting engine designs early on so they can evaluate them. I am sure they have lots of very interesting musems of discarded designs.

Engines currently in use are much more fuel efficient than in the past. Perhaps generally 30-50% better. The oil companies are still happy though because cars generally have got much heavier and faster. The vehicle weights have gone up 50-100% in a lot of cases. hmm In fact I believe the pollution changes demanded, spurred development on to improve efficiency and has not been negative as a lot of people believe.

Scotch yoke engines go back to the days of steam ! Nothing new there. The rotary swash plate engine has been tried lots of times. Works well as a hydraulic motor. The Sarich engine was put to rest years ago even though Australia's largest company backed it. No conspiracy from the oil companies there.

Cheers Jaahn. Hoping for a breakthough any day but not expecting one wink

-- Edited by Jaahn on Monday 10th of August 2015 10:00:27 AM

aussie_paul · Guru

Yes Jaahn, pretty spot on I reckon ...

Aussie Paul. smile

hako · Guru

Jaahn you are spot on re advertising....I wonder how many people on this forum fell for the Hiclone or it's derivatives - bet some still swear by them too.
Good Luck.

rockylizard · Guru

Gday...

HiClone are STILL advertising on TV ... they must be selling a few to justify that outlay. confuse cry

cheers - John

wasn_me · Guru

Jaahn, I was wondering about the valve system, to describe it as a swash plate is probable correct. It would have to be lubricated. How would the lubricant be isolated from getting into the cylinders? If there was a failure in this area the engine would be inoperable, where as a traditional engine can have a minor valve problem & still operate on the remaining cylinders.

PeterD, I had never heard of a scotch yoke engine. I did a bit of a search on it. Interesting. It appears one of the problems was overcoming wear in the slide. It seems to be more popular as a pump, (I'd imagine water pump), the dwell time at the end of the stroke allows the cylinder to fill more.

Cheers Pete

-- Edited by wasn_me on Tuesday 11th of August 2015 08:15:54 AM

PeterD · Guru

wasn_me wrote:
PeterD, I had never heard of a scotch yoke engine. I did a bit of a search on it. Interesting. It appears one of the problems was overcoming wear in the slide.

Pete, CMC solved the crankshaft/con rod wear problem. That was on of their big breakthroughs. As alluded to earlier by Peter_n_Margaret and me even when you get a significant breakthrough in noise, vibration and performance the inertia in the set-up of the major manufacturers precludes them from restructuring their motor plants.