 OT: Interesting new idea, the six-stroke engine |
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| lapuwali |
 Feb 28 2006, 06:40 PM
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Not another one!  Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743   |
Crower (of Crower Cams) has just patented a new "six stroke" engine design. The crank turns 3 times for each single cam revolution. The extra two piston strokes are after the normal exhaust stroke, and involve water direct injection into a closed cylinder. This flashes into steam, and produces a second power stroke. The exhaust then opens to vent the steam. Enough heat is drawn off by this steam production that no actual cooling system is required.
It's claimed this can improve fuel economy by as much as 40%. He's got a single-cylinder spark-ignition prototype working, and is now working on a compression-ignition version. |
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| pek771 |
Mar 3 2006, 10:15 PM
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Member Group: Members Posts: 275 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None 
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Did Crower patent this? I'd like to see the abstract. Also, I'd like to see a plot of the cycle on a T-S diagram.
Also, the staem portion likely produces little power. I'll bet that thing needs a 50 pound flywheel to carry the extra revolution while the vater vapor expands. This is a good thermo problem for you aspiring engineers. Us old engineers don't have as much free time...gotta keep the Porsche fleet running first and foremost. |
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Posts in this topic
lapuwali OT: Interesting new idea Feb 28 2006, 06:40 PM
Andyrew Wow!
But wouldnt that require a lot of water? Feb 28 2006, 06:42 PM Pugbug Interesting idea.
When water turns to steam it ex... Feb 28 2006, 06:45 PM wertygrog You'd have to purge ALL of the water after ste... Feb 28 2006, 08:10 PM lapuwali Feb 28 2006, 08:47 PM Demick It all depends on how much power you get out of th... Feb 28 2006, 09:06 PM messix direct inject on fuel really lean should get comb... Feb 28 2006, 09:13 PM SGB crower write-up
James-
this must be what you read... Feb 28 2006, 09:27 PM MattR Feb 28 2006, 11:43 PM Dr Evil Feb 28 2006, 11:49 PM Dr. Roger Feb 28 2006, 11:49 PM Aaron Cox Feb 28 2006, 11:55 PM MattR <... Mar 1 2006, 12:02 AM Dr. Roger 
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