Fuel Injector: Description and Operation

Fuel Supply, High-pressure Side V6 DFI

NOTE: The engine-specific service intervals and heat ratings of the spark plugs are specified in the maintenance schedules.

The fuel supply on the high-pressure side from the 1-piston high-pressure pump with quantity control valve via the fuel high-pressure rail with high-pressure sensor to the injectors corresponds to that for the previous Cayenne V6 DFI engine.







The direct fuel injection is optimally coordinated to the characteristics of the new V6 engine. The axial-piston pump is camshaft-driven with a double cam. When the engine is running, the high pressure measured by the pressure sensor is regulated to a pressure of between approx. 507 psi (35 bar) and 1522 psi (105 bar) by the quantity control valve.

In the case of direct fuel injection, the fuel is injected directly into the combustion chamber, so that the mixture formation takes place almost entirely within the combustion chamber.







The direct fuel injection system of the V6 engine is based on homogeneous operation when the engine is at operating temperature. The mixture of fuel and air is distributed as evenly as possible in the combustion chamber, thereby enabling optimal combustion. In this process, the fuel is injected directly in the combustion chamber at a pressure of up to 1522 psi (105 bar).

The injection strategies for direct fuel injection with single and multiple injection also correspond to those of the previous model.