• 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.
• 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.