LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2015 >> M5 Standard Trans >> Repair and Diagnosis >> General Information >> OEM General Information >> Functional Description - F10 - HVAC System, Steering System, Restraints System >> Steering System - Functional Description >> Vertical dynamics management (VDM) >> Characteristic curve and setpoint values for tandem pump

Characteristic curve and setpoint values for tandem pump

During idling, the pump speed is approx. 750 rpm. At this idle speed, the tandem pump delivers a volumetric flow of approx. 5 l/min at approximately 3 bar. This ensures adequate system dynamics even at idle speed. At a pump speed of 1250 rpm, the maximum volumetric flow is limited to 9 l/min.

Fig 1: Tandem Pump Characteristic Curve
G09873109Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Pump speed
2 Characteristic curve for tandem pump
3 Volumetric flow

Observe the following setpoint values for the suction throttle valve:

Variable Value
Voltage range 8 to 16 V
Response time at 20 C and 13 V ≤ 40 ms
Power consumption at 25 C and 13 V approx. 1 A
Temperature range -40 °C to 140 °C