Share this entry

Share this page

compression ratio

Line breaks: com|pres¦sion ratio

Definition of compression ratio in English:

noun

The ratio of the maximum to minimum volume in the cylinder of an internal-combustion engine.
Example sentences
  • As the engine load increases, the head tilts by up to four degrees in order to lower the effective compression ratio by altering the volume of the combustion chamber with the piston at top dead center.
  • To determine the compression ratio of an internal combustion engine, compare the greatest volume of the piston cylinder (when the piston is at it's maximum excusion) to the lowest volume (when the piston is at top dead centre).
  • The Manley connecting rods and pistons swing on a Callies crankshaft and provide a compression ratio of 15 to 1.

Definition of compression ratio in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day cumbersome
Pronunciation: ˈkʌmbəs(ə)m
adjective
large or heavy and therefore difficult to carry…