Lesson 7: Fuels And Fuel Systems. Fuels And Fuel Systems. Fuel: The energy source for the combustion process Combustion occurs when fuel comes into contact with oxygen, and the temperature of the mixture is raised to its kindling point.
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What air - fuel mixture would be used to produce the most power?
Pounds of fuel burned per hour
Brake horsepower produced
(grade = octane)
As the velocity of a gas or liquid increases, the pressure decreases.
Varies the pressure in the float chamber between atmospheric and a pressure slightly below atmospheric.
Changes the size of the opening between the float bowl and the discharge nozzle.
of the throttle valve and
above the valve is low.
due to the low pressure
above the throttle valve.
bowl at idle and
discharges it through
the pump discharge
when the throttle is