| Author |
Message |
    
andrew
Moderator
Username: andrew
Post Number: 1017
Registered: 11-2001
| | Posted on Sunday, January 09, 2005 - 10:28 am: | 
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I have received the following correspondance. Maybe someone here can help. Thanks.
Sent in by Ben Tour:
quote:Hi There
I am kind of "inventor", now in a process of filling a provisional patent for a unique 4 stroke engine. While discussing my approach with a known professional professor, he mentioned the existence of a 2 & 4 stroke marine engines by the name of DOLPHIN.
Would you please be so kind and direct me how to get more information about that Dolphin Engine, May be drawings so I have a chance to understand its principle of operation?
Sincerely
Ben Tour
hbtour@gmail.com
I responded:
quote:Was Dolphin the name of the manufacture or a particular model name? You will need to supply more info, such as what time period you are referring to.
Ben responded:
quote:Thank you very much for your prompt answer.
The following Internet site describe the professional life of a well known British engine designer. As you can see, one of his engine is called "The Ricardo Dolphin Two Stroke Engine"
http://www.oldengine.org/members/diesel/misc/ricardo.htm
(Shown on page number 2 of 8).
I am looking for any available information about that engine principal of operation, or any other known engine that makes use of more than one cylinder when performing its two or four stroke sequence ( For example the intake and exhaust inside one cylinder while the compression and combustion are preformed inside another cylinder).
Sincerely
Benjamin Tour
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larry_from_maryland
Senior Member
Username: larry_from_maryland
Post Number: 191
Registered: 07-2003
| | Posted on Sunday, January 09, 2005 - 01:15 pm: |
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Ben's discription is like the reid oilfield engines which used a small cylinder beside the main one.This cylinder sucked in the gas and air and compressed it.This mixture would then push into the main cylinder when it went down. |
tourh
New member
Username: tourh
Post Number: 1
Registered: 01-2005
| | Posted on Monday, January 10, 2005 - 10:15 am: |
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Thanks Larry, will try to find and learn about the "reid oilfield engines" and their performances. |
paul_brooking
New member
Username: paul_brooking
Post Number: 33
Registered: 10-2002
| | Posted on Friday, January 21, 2005 - 09:18 am: |
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There were old two stroke engines that used two cylinders instead of requiring the use of the crankcase. One cylinder was a mixture pump, using an inlet valve operated by atmospheric pressure and a valve in the head of the second combustion cylinder operated by the pump pressure.
The combustion cylinder had the usual exhaust ports.
A completely different realy strange idea I have seen is as follows:
The combustion chamber has the usual exhaust ports, but instead of the usual atmospheric release, the exhaust goes to a water cooled condenser. When the gases are condensed, a small piston pump removes the gas and liquid from the condenser.
because the cylinder gets sucked below atmospheric pressure by the condenser (and also the rapid gass flow at full power), the intake is simply taken straight into the combustion chamber by an atmospheric pressure operated valve in the cylinder head.
I have never seen an example of either these engines, but if anyone intrested, will dig out the manufacturers names.
A valve |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 704
Registered: 11-2001
| | Posted on Friday, January 21, 2005 - 10:29 am: |
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Penrose was one !
 |
tourh
New member
Username: tourh
Post Number: 2
Registered: 01-2005
| | Posted on Friday, January 21, 2005 - 11:24 am: |
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Paul and Richard. Very interesting and new for me.
I believe soon I will be able to revile and discuss my "may be innovative" Ideas through this fine forum and with you so knowledgeable participant.
Thank you very very much, and any additional information is welcomed
Ben |
paul_brooking
Member
Username: paul_brooking
Post Number: 34
Registered: 10-2002
| | Posted on Monday, January 24, 2005 - 01:16 pm: |
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Richard do you know what is inside these engines ?
I have been looking at the pictures trying to work it out. I dont think they are like either type I described, the crankcase seems to be used in the usual way. But there seems to be somthing unusual around the exhaust port area.
PAUL |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 705
Registered: 11-2001
| | Posted on Monday, January 24, 2005 - 02:12 pm: |
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Paul
I have not been able to find any technical details on this engine as yet. The no pressure crankcase indicates intake and exhaust flow is through the chamber, the twin with a common chamber is very interesting. I try to keep notes and If I find more info I'll post it here. I have always wondered about many of these eng designs as to why they didn't last on the market ??
Good subject |
ben tour
Visitor
| | Posted on Tuesday, December 26, 2006 - 11:24 am: |
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Hi Guys
About two years ago I have posted a technical question here on your nice site. I got quick and useful responses and for that I am thankful.
Since I felt as engine knowledge and history is part yours guys soul I would be glad to first publicly publish an engine new process I have invented through your site.
I would not like to intrude into an area this forum is not interested in, so please inform me if you agree that I will post here a privet new URL address which present some information about what I believe will become soon the 21 century main internal combustion engine technology.
Sincerely
Ben Tour |
keith
Senior Member
Username: keith
Post Number: 171
Registered: 02-2002
| | Posted on Tuesday, December 26, 2006 - 11:51 pm: |
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Go for it Ben. Along with our interest in history and the evolution of the internal combustion engine, we would welcome improvements to the technology.
Keith |
tourh
New member
Username: tourh
Post Number: 3
Registered: 01-2005
| | Posted on Wednesday, December 27, 2006 - 01:48 pm: |
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Is it hope for our piston engine fuel thirsty?
Hi guys.
As probably fits this forum goals, please let me start with some engine history, learn a lesson and proceed by bridging over 250 years into what I believe is going to be proved as one of the more innovative piston engine energy management strategy.
Well,
The period was early 18th century. Few relative primitive steam engines are already around. Probably the most known one is the Newcomen steam engine,
http://www.geocities.com/Athens/Acropolis/6914/nwcmne.htm
The Newcomen steam engine happened to be a very hungry machine. Its enormous appetite for coal severely reduced its popular usage opportunities.
About 50 years later British brilliant engineer James Watt
http://www.geocities.com/Athens/Acropolis/6914/wvae.htm
modified the Newcomen steam engine by implementing two energy saving process modification.
He insulated and heated (using a worm steam jacket) the engine cylinder and he moved the steam condensing function from within the cylinder (as was exercised in the Newcomen engine) down to be placed underground.
Those two modification improved the engine previously very poor efficiency by 350 %. (A fact which directly enabled the industrial era to flourish).
Guys:
Does not our today's combustion engine technology resemble a similar energy wasting process (today we loose intentionally through the cooling systems about 2/3 of the original invested heat energy) ?
Is it possible to thermal insulate our engine cylinders?
Please visit our URL: http://www.tourengine.com
Comments/question are welcomed. |
keith
Senior Member
Username: keith
Post Number: 173
Registered: 02-2002
| | Posted on Wednesday, December 27, 2006 - 04:15 pm: |
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Have you built a working model?
Keith |
tourh
Member
Username: tourh
Post Number: 4
Registered: 01-2005
| | Posted on Wednesday, December 27, 2006 - 11:14 pm: |
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Under construction now, will take some more time. |
Stephen Morris
Visitor
| | Posted on Wednesday, June 13, 2007 - 02:44 pm: |
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Hi, Noticed this request for info on the Ricardo two stroke (not a 4 stroke) there is a sole surviving unit at the office of the firm Ricardo UK Limited. Here is the patent drawing |
tourh
Member
Username: tourh
Post Number: 5
Registered: 01-2005
| | Posted on Thursday, June 14, 2007 - 03:28 am: |
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Many thanks Stephen and very interesting.
To me it looks like kind of supercharged + two stroke engine. Taking together it become 4 stroke.
I would have loved to read the full patent, is there away to get it through the web?
Thanks again, appriciat the information |
I brockie
Visitor
| | Posted on Monday, July 20, 2009 - 05:49 pm: |
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The RCA Dolphin engine was a small marine engine, used in small yachtsabout 20 yrs ago. It was a twostroke and did not have a gearbox. I believe that to change from ahead to astern the engine stopped, altered the magneto,and then restarted it. This all happened as you moved the gear lever, and it would restart going the opposite way round |
tourh
Member
Username: tourh
Post Number: 6
Registered: 01-2005
| | Posted on Monday, July 20, 2009 - 11:32 pm: |
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Got little forward since first mentioning here my thoughts.
Please read
http://www.jpost.com/servlet/Satellite?cid=1246443743936&pagename=JPost%2FJPArti cle%2FPrinter
Or visit www.tourengine.com |
vincent tripodi
Visitor
| | Posted on Sunday, August 30, 2009 - 08:04 am: |
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to I brockie i have a dolphin engine in my yacht and i am in need of parts perhaps you maybe able to give me some sddresses thank you regards vince |
Ricardo Patent Drawing
