Fuel Supply, Low-Pressure Side - Fuel Tank

Fuel Supply, Low-Pressure Side

Fuel Tank







The engine is designed to provide optimum performance and fuel consumption if unleaded unleaded fuel 93 octane (R+M/2). When fuel with 90 octane (R+M/2) is used, the engine's knock controller automatically adapts the ignition timing.

In order to make optimum use of the available space, the Panamera is equipped with a saddle step fuel tank with a capacity of approx. 21 Gals. (80 l) on the Panamera S, and 26 Gals. (100 l) on the Panamera 4S and Turbo. This includes approx. 4 Gal. (15 l) reserve capacity.

The low-pressure side of the fuel supply system consists of a returnless fuel system (RLFS - ReturnLess Fuel System). The regulated electric fuel pump delivers the fuel via the fuel filter and fuel-pressure regulator (in the fuel tank) to the quantity control valve on the high-pressure pump with a pressure of approx. 80 psi (5.5 bar). The suction jet pumps in the fuel tank are also operated with the low-pressure side. The 3 fuel-level sensors are installed in the fuel tank for measurement of the fuel level.

On USA vehicles, a leakage diagnostic pump (LDP) is used for the tank leakage test, as in the Cayenne vehicles. This pump is installed directly at the fresh-air connection of the activated carbon filter. The carbon canister is located behind the fuel tank.

Function of the Four Sucking Jet Pumps