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FUEL PRESSURE CONTROL OPERATION [MZR-CD (RF Turbo)]

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• The PCM calculates the target fuel pressure based on the engine speed and fuel injection amount.
• The PCM operates the suction control valve which is installed to the supply pump to adjust the fuel pressure in the common rail to the target fuel pressure.
• By controlling the amount of pumped fuel from the supply pump with the suction control valve, the fuel pressure in the common rail is controlled and a constant, optimum injection pressure has been realized.