FUEL PRESSURE RELIEF VALVE [SKYACTIV-D 2.2]

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Purpose, Function

• If the pressure in the common rail exceeds a certain value, fuel is discharged to assure safety.

Construction

• The fuel pressure relief valve is installed to the common rail.

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• The fuel pressure relief valve consists of a spring, ball, and plunger.

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Operation

• According to the control signal from the PCM, the coil is energized and the plunger is operated to open the fuel passage.

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• The fuel passage opens and the pressure in the common rail flows to the lower case side.

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Fail-safe

DTC

Fail-safe

P009B:00

P009F:00

•  PCM restricts engine torque.

•  PCM restricts fuel pressure. (high pressure side).

•  Inhibits engine-stop by operating the i-stop function.