HOLDEN GEN III V8, Обучение по обслуживанию

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GEN III V8 ENGINE MANAGEMENT
Modular Fuel Sender Operation
During fuelling, fuel enters the reservoir through the secondary umbrella valve (28), located in the bottom of the
reservoir, and self fills to tank levels without jet pump operation When the fuel pump is off, the reservoir
remains full Maximum pickup of fuel occurs at the external strainer (27) and the primary umbrella valve (26)
Primary fuel flow proceeds to the fuel pump strainer (29) and the impeller stage of the fuel pump Whenever the
engine is running, a portion of the pressurised fuel from the bleed at the end cap assembly is directed through
the diverter pipe (23) to the jet pump Return fuel empties into the reservoir via the return line
Fuel Sender Assembly Strainers
Fuel sender assembly strainers are located in the fuel tank to separate water from fuel and to prevent foreign
particles from entering the system In low fuel conditions, the strainer fabric also acts as a wick to draw
sufficient fuel to the inlet of the fuel sender or pump Should the external filter screen become blocked or restrict
fuel entry, then the secondary umbrella valve will unseat, allowing fuel to enter the reservoir area Contaminants
that pass through the fuel pump are filtered out in the downstream, in-line fuel filter before reaching the
injectors Close clearance control between the components prevents internal leakage, ensuring high efficiency
pumping
Single Line Fuel Delivery System
High pressure fuel from the Gerotor fuel pump flows through the fuel pump flex pipe and exits the assembly
through the fuel feed output fitting on the cover From this point, fuel flows through the in-line filter mounted to a
bracket secured to the floor pan Fuel is then directed to the engine bay and fuel rail, where the fuel delivery
system then becomes pressurised When this pressure exceeds a pre-determined value, the fuel pressure
regulator opens, allowing excess system pressure to discharge back to the module reservoir
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