Toro 303447 - Page 12

Inorderfortheenginetorun,theairandfuelmixtureiscompressedinthecylinder.Thisincreasesthe
densityofthefuelairmixtureandallowsforamoreefficientcombustionprocess,andhigherpower
output.
CompressionratioisacomparisonbetweenthevolumeofthecylinderatBDCtothevolumeofthe
cylinderatTDC.
Ratiosof6to8:1arecommonforgasolineenginesand18to20:1forDieselengines.