Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - IMO variable compression ratio is the answer

arcosine · 12-24-2012, 09:08 PM

It's the expansion ratio that counts. If you could have 10:1 compression and 14:1 expansion ratios, that would be the key. Honda has a small engine that does this.

12-24-2012, 09:08 PM	#7 (permalink)
arcosine Master Ecomadman Join Date: Nov 2010 Location: Chicago area Posts: 1,154 sc1 - '98 saturn sc1 Team Saturn 90 day: 43.17 mpg (US) Airplane Bike - '11 home built Carp line Tour rans - '97 rans tailwind tractor - '66 International Cub cadet 129 2002 Space Odyssey - '02 Honda Odyssey EX-L 90 day: 28.25 mpg (US) red bug - '00 VW beetle TDI big tractor - '66 ford 3400 red vw - '00 VW new beetle TDI 90 day: 58.42 mpg (US) RV - '88 Winnebago LeSharo 90 day: 16.67 mpg (US) Thanks: 20 Thanked 337 Times in 227 Posts	It's the expansion ratio that counts. If you could have 10:1 compression and 14:1 expansion ratios, that would be the key. Honda has a small engine that does this. __________________ - Tony