BMW B58TU Reference Manual page 24

B58TU￿Engine
4.￿Cooling￿System
Index
1
2
3
4
5
6
7
A￿rotary￿valve￿inside￿the￿heat￿management￿module￿ensures￿needs-driven￿cooling￿of￿the￿various￿engine
components.￿The￿opening￿cross-sections￿of￿the￿various￿coolant￿ducts￿can￿be￿opened￿or￿closed
variably.￿A￿position￿sensor￿in￿the￿electrical￿actuator￿of￿the￿heat￿management￿module￿forwards￿the
current￿position￿of￿the￿rotary￿valve￿to￿the￿Digital￿Motor￿Electronics￿(DME).￿The￿exact￿position￿of￿the
rotary￿valve￿can￿thus￿be￿determined￿so￿that￿it￿opens￿or￿closes￿a￿precisely￿defined￿cross-section￿with
respect￿to￿the￿various￿coolant￿ducts.￿Adjusting￿the￿cross-sections￿ideally￿adapts￿the￿flow￿rates￿of￿the
coolant￿ducts￿connected￿to￿the￿heat￿management￿module￿to￿the￿engine￿operating￿points.￿To￿correctly
position￿the￿rotary￿valve,￿the￿Digital￿Motor￿Electronics￿(DME)￿require￿information￿including￿the￿coolant
temperature￿from￿the￿coolant￿temperature￿sensor,￿and￿the￿material￿temperature￿of￿the￿cylinder￿head
from￿the￿component￿temperature￿sensor￿.￿Warm-up￿and￿cooling￿of￿the￿engine￿and￿the￿supply￿to
ancillary￿components￿can￿be￿implemented￿as￿driven￿by￿requirements,￿thus￿optimizing￿consumption.
The￿following￿tables￿provide￿an￿overview￿of￿the￿technical￿data￿of￿the￿heat￿management￿modules:
Direct￿current￿motor￿(DC)
Voltage￿range￿in￿volts￿(V)
Power￿consumption￿in￿ampere￿(A)
Gear￿reduction
Adjustment￿speed￿per￿second
Position￿sensor
Voltage￿range￿in￿volts￿(V)
Power￿consumption￿in￿milliampere
(mA)
Output￿signal
Rotational￿angle￿of￿the￿rotary￿valve
*￿SENT￿report￿=￿Single￿Edge￿Nibble￿Transmission
Explanation
Coolant￿output￿towards￿the￿coolant￿pump
Electric￿split￿cooling￿valve
Coolant￿outlet￿to￿coolant￿radiator
Electrical￿actuator,￿heat￿management￿module
Coolant￿entry,￿split￿cooling￿valve
Coolant￿entry,￿heat￿management￿module
Coolant￿outlet,￿heating
B58￿engine
6￿-￿16
0.3￿-￿1.5
1￿:￿492
40°
B58￿engine
4.5￿-￿5.5
20￿-￿35
SENT￿report*
200°
B58TU￿engine
9￿-￿16
0.5￿-￿0.8
5￿:￿769
64°
B58TU￿engine
4.5￿-￿5.5
20￿-￿25
SENT￿report*
165°
19