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Content .. 1104 1105 1106 1107 ..
3
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Fuel pump module
4
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Fuel tank
5
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Fuel tank filler pipe
6
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Fuel transfer pump
The electronic returnless fuel system utilized has the following advantages: reduced fuel tank vapor generation requires less electrical power does not require a fuel return line. The intelligence of this system is contained within the engine control module (ECM).
The ECM determines the required fuel flow and communicates this information to the rear electronic module (REM). The REM has the fuel pump driver functions fully integrated into the microprocessor. The fuel pump relay is activated by the ECM power relay and provides a fused power supply to the REM. The ECM and the REM calculate the frequency and determine the current required by the fuel pump to maintain the correct fuel pressure at the fuel injectors.
The fuel tank is of a saddle design which incorporates a fuel pump module on the right-hand side and a fuel transfer module on the left-hand side. The fuel pump crossover lines are internal to the fuel tank to reduce potential leak paths.
Fuel is supplied at high pressure to the injectors through a fuel rail which incorporates a fuel pressure and a fuel temperature sensor. The ECM increases the fuel pressure to minimize fuel vapor formation to maintain fuel flow across the injectors. An inertia type fuel shut-off switch will cut power to the fuel pump in the event of an accident. |