Golden Eagle 2610E, Инструкция по эксплуатации, Страница: 25 / 50

(Continued from page 23)
WARNING
IF THE MIXTURE IS TOO LEAN THE ENGINE MAY DIE AT THIS POINT. UPON
RESTARTING, FLAME MAY MOMENTARILY SHOOT OUT THE DISCHARGE
TUBE.
NOTE
This section outlines the operating systems in the Carburetor. Refer to "The
Starting System Diagram” and the "Carburetor System Diagram "for a pictorial
representation of all systems and names. The end of this section contains
procedures for all possible Carburetor adjustments. (See Pages 27 & 28)
The purpose of the Carburetor is to supply a combustible mixture of fuel and air to the Pulse Jet
Engines. The Carburetor uses four systems to create this mixture. These systems are:
1. A Venturi
2. A Metering Chamber
3. A Fuel Pump
4. A Fuel Needle
The Venturi is the air passage through the Carburetor. When air moves through a Venturi a partial
vacuum is created. The strength of the vacuum varies proportionately to the amount of air flowing through
the Venturi. When a constant volume of gasoline is connected to the Venturi, the vacuum created by the
Venturi will draw an amount of gasoline proportional to the air flow past the Venturi and disperse the
gasoline in the airflow. This arrangement allows the Carburetor to always supply the correct ration of fuel
and air to the engine.
The Metering Chamber maintains a constant volume of gasoline for the Venturi and prevents
gasoline from leaking out through the Carburetor should the machine be overturned. As gasoline enters
and begins to fill the Metering Chamber, it presses out on the Metering Diaphragm allowing the spring
under the Metering Lever to push out on the lever closing the Inlet Needle Valve. When the air flowing
through the Venturi draws gasoline from the Metering Chamber, the Metering Diaphragm moves in
pressing in the Metering Lever and opening the Inlet Needle Valve, thereby allowing the metering
Chamber to fill with gasoline again. When the engine is not running, vacuum is not created in the Venturi
to move the Metering Diaphragm so the Metering Diaphragm does not move in and out. In this condition
the spring beneath the Metering Lever holds the Inlet Needle Valve closed preventing gasoline from
leaking through the Carburetor if the machine is overturned.
The purpose of the Internal Fuel Pump is to deliver the gasoline to the Carburetor and be capable of
delivering at least the maximum amount of gasoline the Pulse Jet Engine would ever require. The Fuel
Pump Diaphragm is driven by the alternating positive and negative air pressure from the engine's intake-
explosion-discharge cycle. Movements of the Pump Diaphragm draw gasoline through a series of check-
valves and push the gasoline toward the Metering Chamber.
The Fuel Needle fine tunes the fuel-air mixture allowing for small differences in engines and
Venturis
.
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