FUEL PUMP UNIT [SKYACTIV-G 1.3, SKYACTIV-G 1.5]SM2759874
FUEL PUMP UNIT [SKYACTIV-G 1.3, SKYACTIV-G 1.5]

id0114q1103600


Purpose, Function

• The fuel pump unit supplies fuel in the fuel tank to the high pressure fuel pump.
• Based on the control signal from the PCM, the fuel pump operates by the operation of the fuel pump relay and the fuel pump control module.

Construction

• The fuel pump unit is located on the fuel tank.
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (without EGR cooler)
• The fuel pump unit consists of a fuel pump, fuel filter (low-pressure) fuel filter (high-pressure), pressure regulator, and reserve cup.
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SKYACTIV-G 1.5 (with EGR cooler)
• The fuel pump unit consists of a fuel pump, fuel filter (low-pressure), fuel filter (high-pressure), relief valve, check valve, jet pump, and reserve cup.
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Operation

SKYACTIV-G 1.3, SKYACTIV-G 1.5 (without EGR cooler)
• Based on the control signal from the PCM, the fuel pump suctions fuel in the reserve cup and pumps it to the high pressure fuel pump. After fuel is sufficiently filtered through the fuel filter (low-pressure) and fuel filter (high-pressure), fuel pressure is adjusted to approx. 450 kPa {4.59 kgf/cm2, 65.3 psi}. by the pressure regulator.
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SKYACTIV-G 1.5 (with EGR cooler)
1. The fuel pump is supplied power from the fuel pump control module by the PCM control and suctions the fuel in the reserve cup.
2. Fuel is filtered through the fuel filter (low pressure).
3. The fuel boosted by the fuel pump is sent to the feed pipe side and check valve side.
4. Fuel is filtered through the fuel filter (high pressure).
5. The fuel passing through the orifice is recirculated to the reserve cup.
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6. If the fuel pressure is the specified value or higher, the relief valve opens to release the fuel into the reserve cup to assure the safety.
7. The check valve suppresses fuel vapor occurrence by maintaining residual pressure in the fuel pipe after the ignition is switched OFF and assures boost the next time the engine is started.
• For fuel pump control details, refer to the CONTROL SYSTEM. (See FUEL PUMP CONTROL [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

Fail-safe

• Function not equipped.