Crower Six Stroke Engine
Crower Six Stroke Engine
(OP)
I have recently read in an automotive trade magazine that Bruce Crower of Crower Cams has designed and patented a new six stroke gasoline engine that uses steam produce a second power stroke that is produced from water injection. This engine design is supposed to produce equal horsepower, but a 40% decrease in fuel consumption and a significant decrease in emissions. I have looked online to find more information about it, but have not found any. I have read the other posts on the six stroke engine cycle, but it looks like Crower's design might be more feasible. I am curious of your opinions on the future use of this technology to be used in the future, and where to find more information on it.
Thanks,
Don
Thanks,
Don





RE: Crower Six Stroke Engine
RE: Crower Six Stroke Engine
RE: Crower Six Stroke Engine
Some interesting trivia along this line.
http://www.jakebrake.com/about-us/history.php
Clessie Cummins, the inventor of the Cummins diesel engine invented the compression release brake in his retirement.
The idea was rejected by the management of the Company Clessie had founded but no longer controlled. Clessie teamed up with the worlds leading manufacturer of drill chucks to manufacture and market his new invention. Does anyone else out there remember the "Jacobs Three Jaw Chuck".
That's how Clessie Cummin's invention came to be called the Jacobs Brake or "Jake".
Did you know that;
"The vehicle selected for the first field tests of the completed device was a 1955 GMC “Suburban” station wagon re-powered with a Cummins JN-6 diesel engine"?
yours
RE: Crower Six Stroke Engine
RE: Crower Six Stroke Engine
is it suck, squeeze, bang, blow, spray-flash, blow?
Hydrae
RE: Crower Six Stroke Engine
is it suck, squeeze, bang, blow, spray-flash, blow?"
Hydrae
Yes but he is also working on suck, squeeze, bang, squeeze, spray-flash, blow
RE: Crower Six Stroke Engine
1339176
2671311
3964263
You have to load a special browser first.
Info is on the US patent site.
RE: Crower Six Stroke Engine
suck
squish
bang
blow
What makes it a six stroke?
foreplay
suck
squish
bang
blow
cuddle
???
RE: Crower Six Stroke Engine
I just downloaded the whole of 3964263 as a PDF file by clicking on "Save Full Document". I prefer to download patents so I can look at them when I like, without having to be online.
RE: Crower Six Stroke Engine
http://w
RE: Crower Six Stroke Engine
There is an SAE paper by some Japanese authors on a six-stroke diesel. The process was this:
intake stroke
compression stroke
inject diesel fuel, burn, & expand
compress hot stuff
inject diesel fuel, burn, & expand
exhaust stroke
Power density (torque for a given displacement) was somewhat low, which is a big disadvantage for engines in mobile applications.
Early engine designers proposed some six stroke engines. I think that some are described in the book Internal Fire by Lyle Cummins.
j2bprometheus
RE: Crower Six Stroke Engine
From the desk of Peter F. Roberts, CANUSA Motorsports Engineering, Syracuse N.Y.
RE: Crower Six Stroke Engine
There exists exactly one such engine, and Mr. Crower himself admits that it hasn't been run on a dynamometer, i.e., it hasn't been asked to produce any power beyond that required to keep itself in motion. I assume that his emission testing regimen goes just a little beyond measuring how badly his wife complains about the stink produced.
By which I mean no insult to Mr. Crower, for whom I have the greatest admiration. But he's just one guy puttering in the basement.
Developing a new engine technology sounds like a barrel of fun, but getting it into production is bound to produce more than one barrel of corroded broken junk, and it's sure to burn many thousands of barrels of money, none of which is being bandied about here, or in Mr. Crower's vicinity either.
Mike Halloran
Pembroke Pines, FL, USA
RE: Crower Six Stroke Engine
No it doesn't. That implies a doubling of efficiency, which ain't gonna happen.
2. The immediate incorporation of this system into current production vehicle is possible since there is NO NEW TECHNOLOGY that must be incorporated into the vehicle or the manufacuring process, no new tooling!!!
Apart from a water injector, and some way to make the cats work in the presence of steam (I don't know if that is an issue), and some way of lubricating the cylinder walls in the presence of continual steam cleaning...
4. It is not dependant on RARE EARTH ELEMENT technology such as hybrid drive systems.
True. Did you know that a set of custom made rare earth magnets for a wheel motor's Halbach array costs less than 500 bucks? That is for a one-off!
5. It does not ADD WEIGHT like hybrid systems.( efficeintcy and weight are interdepenant, the more weight the more energy it takes to motivate the vehicle )
Ah, so we are using weightless water?
6. It does not carry the energy consumption in manufacuring penilty of hybrid systems. ( there is an overfocus on end use energy comsumption of modern vehicles and an oversight of the energy requirements to manufacture the vehicle. MOST VEHICLES FROM RAW MATERIAL TO END OF USE NOW CONSUME MORE ENERGY TO MANUFACTURE! NOT DRIVE 150K miles )
Cite? The estimates I have seen suggest that in one year a car consumes as much energy as it takes ot build it. Now, I doubt they were true well-to-wheel type calculations, but you are suggesting a disparity by a factor of 15, which seems high.
7. NO EMF's from electric motor/dynamo ( ELECTRO MAGNETIC FIELD RADIATION IS THE GREATEST SECRET HEALTH THREAT OF THE 20th & 21st CENTURIES )
I'm more worried by the well known health threats than the secret ones.
From the desk of Peter F. Roberts, CANUSA Motorsports Engineering, Syracuse N.Y.
Yeah, but who was sat at the desk?
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Crower Six Stroke Engine
"Yeah, but who was sat at the desk?"
and I'd hazard a guess that it was someone wearing a tinfoil hat!
RE: Crower Six Stroke Engine
http://ww
RE: Crower Six Stroke Engine
RE: Crower Six Stroke Engine
Tim Spruill
RE: Crower Six Stroke Engine
RE: Crower Six Stroke Engine
Discussing _any_ of your research outside an NDA, much less in a public forum, compromises your ability to protect resulting inventions, and therefore your ability to raise money.
Further discussion is contraindicated.
Mike Halloran
Pembroke Pines, FL, USA