English to Italian Tech/Engineering Mechanics / Mech Engineering engine valves

In engines having an air throttle, it has been
found that air flow restriction or throttling losses during
light load operation with the throttle nearly closed increase
the rate of fuel consumption; whereas, operation
of the engine at near fully open throttle minimize the air
"throttling losses" and improves the fuel economy of the
engine. Accordingly, it has been desired to operate the
throttled engine under conditions in which the throttle is
opened a greater amount for given engine load conditions.