Continental Refrigerator IO-240-A, Инструкция по установке и эксплуатации

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2-16 IO-240 Series Engine Installation & Operation Manual
31 October 2011
Engine Description
2-2.7. Fuel System
The Fuel System (Figure 2-20) is composed of an engine-driven fuel pump, a fuel
manifold valve, an induction system throttle body and fuel injector assemblies. The multi-
port, continuous flow fuel injection system controls fuel flow to match engine
requirements. The fuel metering unit/throttle controls the amount of intake air admitted
through the intake manifold and meters the proportionate amount of fuel to the fuel
manifold valve.
Figure 2-20. IO-240 Standard Fuel Injection System
2-2.7.1. Fuel Pump
An engine-driven, positive displacement fuel pump (Figure 2-21) delivers fuel to the fuel
injectors. Fuel enters the fuel pump at the well of the swirl chamber where the fuel is
centrifuged and the liquid is separated from fuel vapor. The liquid fuel is directed to the
fuel pump blades. The fuel pump blades force the fuel to the fuel pump outlet through
various fittings, and fuel lines to the fuel manifold valve.
The fuel pump is directly driven at the same speed as the crankshaft; fuel flow and
pressure vary directly with engine speed. An adjustable relief valve maintains pump flow
and pressure for the lower engine speeds, while an adjustable orifice controls fuel pump