Assertion: engine's compression ratio | /r/CapableOf | increase the temperature of the air
Facets:
value: to ignite the diesel
type: PURPOSE
value: sufficiently
type: MANNER
Source sentences:
text: Diesel engines use higher compression ratios than petrol engines, because the lack of a spark plug means that the compression ratio must increase the temperature of the air in the cylinder sufficiently to ignite the diesel using compression ignition.