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279 - 2.0 110 kW Engine with Gasolina Direct Injection - Volkspage

279 - 2.0 110 kW Engine with Gasolina Direct Injection - Volkspage

In the high-pressure

In the high-pressure system, the fuel flows at approx. 40 – 110 bar (depending on load and engine speed) out of the single-plunger highpressure pump into the fuel rail, from where it is distributed to the four high-pressure injectors. The pressure relief valve is designed to protect the components subjected to high pressure and opens as of a pressure of > 120 bar. When the pressure relief valve opens, the fuel flows into the supply pipe to the highpressure pump. Double cam Fuel metering valve -N290 approx. 40 - 110 bar Single-plunger highpressure pump approx. 6 bar ACF valve No pressure Low pressure approx. 6 bar Activated charcoal filter High pressure approx. 40 -110 bar 279_034 25

Engine sub-systems Single-plunger high-pressure pump The single-plunger high-pressure pump with adjustable delivery rate is driven mechanically by the camshaft via a double cam. The electric fuel pump provides the highpressure pump with a supply pressure of up to 6 bar. The high-pressure pump generates the high pressure required in the rail. Fuel metering valve -N290 The pressure damper reduces fuel pressure pulsation in the system. Pressure damper 279_035 As the piston moves down, fuel flows at a supply pressure of approx. 6 bar from the intank pump via the inlet valve into the pump chamber. 279_037 26

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