What are the most common types of fuel metering systems used on small reciprocating engines?
fuel metering systems 9
|what are the most common types of fuel metering systems used on small reciprocating engine?(3)||float-type carburetors, pressure-injection carburetors and direct fuel injection systems.|
|what function does the mixture control perform?||controls the fuel-air mixture.|
What are the two most commonly used carburetors in small reciprocating engines?
Float-type carburetors, complete with idling, accelerating, mixture control, idle cutoff, and power enrichment systems, are the most common of the two carburetor types.
What is the importance of knowing the sea level boosted engines?
Better engine performance at altitude
Apiston engine produces its maximum power when it breathes air at sea-level pressure. Because air pressure and density decrease with altitude, an engine becomes increasingly breathless as it climbs.
How do we disconnect engine controls?
Disconnection of Engine Controls
The engine control rods and cables connect such units as the carburetor or fuel control throttle valve and the mixture control valve with their manually actuated control in the cockpit. The controls are sometimes disconnected by removing the turnbuckle that joins the cable ends.
Does fuel flow through the main discharge nozzle at idle?
With the throttle open enough so that the main discharge nozzle is operating, fuel does not flow out of the idling jet. As soon as the throttle is closed far enough to stop the spray from the main discharge nozzle, fuel flows out the idling jet.
What are the common types of main discharge nozzles?
There are five basic nozzle types:
- the solid bore.
- the single gallonage (sometimes called variable pressure/variable flow)
- the adjustable gallonage.
- the automatic or constant pressure.
What are the two primary sections of a fuel control?
The basic function of the engine fuel system is to pressurize the fuel, meter fuel flow, and deliver atomized fuel to the combustion section of the engine. Fuel flow is controlled by a hydromechanical fuel control assembly, which contains a fuel shutoff section and a fuel metering section.
What are the three general causes of vapor lock?
What are the three general causes of vapor lock? They are low fuel pressure, high fuel temperatures, and excessive fuel turbulence.
Which of the following is a disadvantage of fuel injection systems?
Disadvantages of Fuel Injected Engine
Fuel injection system is a complex electronic controlled device that related and connected with few electronic sensors and complex engine control unit. Its maintenance or repair scope is very limited and not possible in regular workshop. The whole system is quite expensive.