Assertion: aircraft engine | /r/CapableOf | vary the fuel/air ratio
Facets:
value: for optimized performance
type: PURPOSE
value: over a range of operating conditions
type: OTHER
Source sentences:
text: Before fuel injectors were used, automobiles and aircraft engines used much more sophisticated carburetors to spray the fuel, mix it with the air, and vary the fuel/air ratio for optimized performance over a range of operating conditions.