It provides a constant discharge fuel pressure for idling and it provides a positive shutoff for the fuel when the engine is shut down. 10. How does the mixture control change the fuel-air mixture ratio on the Teledyne-Continental fuel injection system?
What is the purpose of the discharge nozzles in the fuel injection system?
As fuel flow through the regulator is increased above idle requirements, fuel pressure builds up in the nozzle lines. This pressure fully opens the flow divider valve, and fuel distribution to the engine becomes a function of the discharge nozzles.
Where does the fuel metering system of a turbine engine discharge its fuel?
1. Where does the fuel metering system of a turbine engine discharge its fuel? The fuel is discharged through spray nozzles into the combustion chambers.
What determines the rate of fuel discharge at each differential pressure?
The size of this jet determines the rate of fuel discharge at each differential pressure. If the jet is replaced with a larger one, the fuel flow increases, resulting in a richer mixture. If a smaller jet is installed, there is a decrease in fuel flow and a leaner mixture.
What is the significance of the letters that are stamped on the flats of a fuel injection nozzle?
What is the significance of the letters that are stamped on the flats of a fuel injection nozzle? These letters designate the relative size of the orifice in the injector nozzle. The lower the letter in the alphabet, the smaller the amount of fuel the nozzle will flow.
Where is the fuel injector nozzle?
Because fuel flows through the system in a continuous stream, regardless of piston position or stroke, the nozzle is placed upstream of the intake valve.
What is the main component of fuel injection system?
Abstract: The fuel injection system can be divided into low-pressure and high-pressure sides. The low-pressure components include the fuel tank, fuel supply pump and fuel filter. The high-pressure side components include a high pressure pump, accumulator, fuel injector and fuel injector nozzle.
What are the two basic sections of any fuel system?
Modern fuel controls can be divided into two basic groups: hydromechanical and electronic. Hydromechanical controls are used most often.
What are the advantages of a fuel injection system as a fuel metering system?
What are some of the advantages of fuel injection systems over carburetor systems? Less danger of induction icing, better acceleration, better fuel distribution, better fuel economy, reduced overheating of individual cylinders.
How does a fuel control unit work?
The fuel control unit (FCU) uses a speed governor to adjust the shaft speed to the value demanded by the input of the power lever. For the calculation of the fuel flow the FCU follows the fuel demand function of the specific engine.
What is the principles of carburetion?
The carburetor works on Bernoulli’s principle: the faster air moves, the lower its static pressure, and higher the dynamic pressure is. The throttle (accelerator) linkage does not directly control the flow of liquid fuel.
How do the mixture control plates regulate the amount of fuel to go to the discharge nozzle?
The manual mixture control valve controls the fuel flow. By using proper size jets and regulating the pressure differential across the jets, the right amount of fuel is delivered to the discharge nozzle, giving the desired fuel/air ratio in the various power settings.
What must not be disturbed if the automatic mixture control AMC is removed to be cleaned?
The automatic mixture control can be removed and cleaned if the lead seal at the point of adjustment is not disturbed.
How are injector nozzles identified?
Naturally aspirated injector nozzles are identified by the gold anodized shield around the nozzle body. Each nozzle has a calibrated fuel restrictor that slips into the body of the nozzle. These are identified by machined bands on the body of the restrictor.
How do you clean GAMI fuel injectors?
Instructions for Continued Airworthiness and Periodic Maintenance: GAMI recommends removal and cleaning of the nozzles at normal intervals of 100-200 hours. Nozzles may be soaked in an appropriate solvent such as Gunk carburetor cleaner or Hoppe’s #9 Gun Solvent, followed by blowing off with an air nozzle.
What is the purpose of the carburetor accelerating system?
The accelerating system supplies extra fuel during sudden increases in engine power. When the throttle is opened, the airflow through the carburetor increases to obtain more power from the engine. The main metering system then increases the fuel discharge.