BMW B58TU Reference Manual page 22

B58TU￿Engine
4.￿Cooling￿System
Index

1

To￿guarantee￿optimal￿heat￿distribution￿during￿the￿cylinder￿head￿and￿crankcase￿warm-up,￿the￿coolant
supply￿for￿the￿cylinder￿head￿and￿crankcase￿is￿controlled￿individually.￿The￿coolant￿is￿controlled￿by￿the
Digital￿Motor￿Electronics￿(DME).￿The￿coolant￿is￿distributed￿by￿the￿electric￿split￿cooling￿valve￿on￿the
heat￿management￿module￿in￿the￿warm-up￿phase￿such￿that￿substantially￿more￿coolant￿is￿available￿to
the￿cylinder￿head￿than￿to￿the￿crankcase.￿Depending￿on￿the￿engine's￿operating￿condition,￿the￿Digital
Motor￿Electronics￿(DME)￿decide￿on￿the￿distribution￿of￿the￿coolant￿quantity￿to￿the￿cylinder￿head￿and￿the
crankcase￿as￿required.
Direct￿current￿motor￿(DC)
Voltage￿range￿in￿volts￿(V)
Power￿consumption￿in￿ampere￿(A)
Control￿frequency￿of￿the￿DC￿motor￿(kHz)
Gear￿reduction
Adjustment￿speed￿per￿second
4.1.2.￿Switching￿logic￿of￿split￿cooling￿valve
Switching￿logic￿of￿electric￿split￿cooling￿valve
Explanation
Electric￿split￿cooling￿valve
B58TU￿engine
6￿-￿16
0.4￿-￿1
1
1￿:￿440
65.5°
17