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compression ratio

   Also found in: Acronyms, Encyclopedia, Wikipedia 0.01 sec.
compression ratio
n.
In an internal combustion engine, the ratio of the volume between the piston and cylinder head before and after a compression stroke.
compression ratio
n
(Engineering / Automotive Engineering) the ratio of the volume enclosed by the cylinder of an internal-combustion engine at the beginning of the compression stroke to the volume enclosed at the end of it
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This arrangement allows the engine to operate at a much higher compression ratio - a measure of the amount by which the fuel-air mixture is compressed before being ignited - than normal.
Alcohol can make cars more climate-friendly by Asian News International
Combined consumption is 53mpg and, thanks to a particulate filter and a reduced compression ratio, emissions are down to 139g/km.
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264 more than doubles the compression ratio so that it takes less time to send video files via email or upload them onto the internet.
High-tech camcorders unveiled by Gulf Industry
 
 
 
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