Fuel Supply, Low-Pressure Side V6 DFI

Fuel Supply, Low-pressure Side V6 DFI

Fuel quality
The engines are designed for unleaded premium fuel 93 octane(R+M/2). If fuel with a lower number is used, corresponding adaptation is performed by the knock control.







Fuel tank
Cayenne V6/Cayenne S - Filling capacity 22.4 gal. (85 l), reserve 3.9 gal. (15 l)

Function descriptions

The function descriptions for following three items can be found in the part of this section dealing with the V8 engines.
- Internal design of the fuel tank for RLFS and
- Tank ventilation and
- Control unit for electric fuel pump







Control unit for electric fuel pump

Compared with the function described for the V8 models, the control function has the following changes:
- On the Cayenne V6 DFI the delivery rate can be reduced to such an extent that the fuel pressure falls from approx. 82 psi (5.7 bar) to 58 psi (4 bar), depending on the fuel requirement. The low pressure is detected by a pressure sensor for this. The low pressure sensor is installed on the left bulkhead in the engine compartment.
- This control function differs from the V8 engines, which have a constant fuel low pressure of approx. 82 psi (5.7 bar).