6-stroke Engine Claimed Patented.

From a little story in the February 27 issue of Autoweek.

Bruce Crower, of [link|http://www.crower.com/|Crower], has patented a 6-stroke engine. The other two strokes remove heat from the cylinder by water injection, and the steam pushes the piston down. It's a neat idea (e.g., less waste heat lost to the cooling system), but I wonder about reliability (e.g. corrosion and oil dilution). Also, efficiency is lost by having to heat up the cylinder and piston again (the [link|http://www.qrg.northwestern.edu/thermo/design-library/otto/otto.html|Otto cycle efficiency] is maximum for high temperatures, pressures and compression ratios). Whether or not the temperature change is less than in a 4-cycle, I can't say.

He's built a 1-cylinder prototype, but has no data to back up his expectations that full-size versions will consume 40% less fuel and have lower emissions than 4-cycle engines. He's also working on a diesel version.

Unfortunately, nothing about it shows up in my search at the [link|http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=crower&FIELD1=&co1=AND&TERM2=&FIELD2=&d=ptxt|USPTO], nor in a search of [link|http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=crower&FIELD1=&co1=AND&TERM2=&FIELD2=&d=PG01|Patent Applications].

FWIW.

[edit:] An online Autoweek article by Pete Lyons on it is [link|http://autoweek.com/apps/pbcs.dll/article?AID=/20060224/FREE/60222004&SearchID=73236844454521|here]. It's longer than the few paragraphs in the magazine. It mentions a certain Jim Rathmann as well. Hmmm... :-)

Cheers,
Scott.

Post #246,162 by Another Scott 2/25/06 3:05:18 PM 2/26/06 12:29:05 PM Reply	6-stroke Engine Claimed Patented. From a little story in the February 27 issue of Autoweek. Bruce Crower, of [link\|http://www.crower.com/\|Crower], has patented a 6-stroke engine. The other two strokes remove heat from the cylinder by water injection, and the steam pushes the piston down. It's a neat idea (e.g., less waste heat lost to the cooling system), but I wonder about reliability (e.g. corrosion and oil dilution). Also, efficiency is lost by having to heat up the cylinder and piston again (the [link\|http://www.qrg.northwestern.edu/thermo/design-library/otto/otto.html\|Otto cycle efficiency] is maximum for high temperatures, pressures and compression ratios). Whether or not the temperature change is less than in a 4-cycle, I can't say. He's built a 1-cylinder prototype, but has no data to back up his expectations that full-size versions will consume 40% less fuel and have lower emissions than 4-cycle engines. He's also working on a diesel version. Unfortunately, nothing about it shows up in my search at the [link\|http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=crower&FIELD1=&co1=AND&TERM2=&FIELD2=&d=ptxt\|USPTO], nor in a search of [link\|http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=crower&FIELD1=&co1=AND&TERM2=&FIELD2=&d=PG01\|Patent Applications]. FWIW. [edit:] An online Autoweek article by Pete Lyons on it is [link\|http://autoweek.com/apps/pbcs.dll/article?AID=/20060224/FREE/60222004&SearchID=73236844454521\|here]. It's longer than the few paragraphs in the magazine. It mentions a certain Jim Rathmann as well. Hmmm... :-) Cheers, Scott. Edited by Another Scott Feb. 26, 2006, 12:29:05 PM EST Expand All History
Post #246,181 by Steve Lowe 2/25/06 8:15:51 PM Reply	Interesting, thanks. Back in my engine building days, I was always a fan of Crower cams and cranks, I'll definitely befollowign this story. -- Steve [link\|http://www.ubuntulinux.org\|Ubuntu]
Post #246,219 by folkert 2/26/06 1:30:51 PM Reply	I still am a big fan of Crower's Cams, Cranks, Connecting Rods, billet steel this-n-that. The billit cranks are far above most others out there. One reason is he has billit hammer the was specifically made for him and his needs. He will run untempered billit steel through it and make it even smaller. smaller == denser, more closely packed. It is partially why his stuff is just so damn good, he doesn't leave well enough alone. Edelbrock had and still has a ways to catch up. Though Edelbrock has a much larger empire and domain of products. Quantity makes business big. -- [link\|mailto:greg@gregfolkert.net\|greg], [link\|http://www.iwethey.org/ed_curry\|REMEMBER ED CURRY!] @ *i_wethey* Freedom is not FREE. Yeah, but 10s of Trillions of US Dollars? SELECT * FROM scog WHERE ethics > 0; 0 rows returned.

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