Turbo Oil Pump; Reduction Of Friction Losses By Variable Oil Flow - Porsche Cayenne V6 2008 Service Information

Reduction of friction losses by variable oil flow

Delivery rating of a
constant pump
V
Reduction of friction losses by variable oil pressure
Conventional pressure curve
due to delivery rating w/o pressure regulation
p_oil
Cayenne Turbo Oil Pump
The Cayenne Turbo has an additional pressure oil line for turbocharger
lubrication. A turbocharger suction pump (-4-) is integrated in the main
oil pump for suctioning off the lubricating oil.
The control valve is fitted on the oil pump in such a way that it can be accessed
from the outside.
Reduced friction losses
by controlled oil flow
Engine oil displacement
= Delivery rating of oil flow regulating pump
n
Reduced friction losses
by pressure control
Pressure curve due to engine demand
n
Engine – Cayenne V8
1 - Intake stage
2 - Control valve
3 - Variable pressure stage
4 - Turbocharger suction pump
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