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compression ratio
noun
, Automotive.
- the ratio of the cylinder volume enclosed by the piston at its outermost position to the volume enclosed by it at its innermost position.
compression ratio
noun
- 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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Word History and Origins
Origin of compression ratio1
First recorded in 1905–10
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Example Sentences
The compression ratio of this engine was lowered by almost 20 percent from that of the vertical 4.
From Project Gutenberg
This seems low, considering the compression ratio and probable leakage past their rather weak piston rings, but it is possible.
From Project Gutenberg
It is significant that in 1930 the Packard diesel had a compression ratio of 16:1, whereas in 1931 it has been reduced to 14:1.
From Project Gutenberg
Any desired ideal efficiency may be obtained from any of the cycles by selecting a suitable compression ratio.
From Project Gutenberg
You've got thirty tons of fuel—you want to find the compression ratio of the number-one firing-tube chamber—so what do you do?
From Project Gutenberg
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