BMW 5 Series: Operating temperature
The positions of the rotary valve at engine operating temperature are shown by area C of the circuit diagram.
Operating temperature, Bx8TU engine
The graphic shows control with the engine at operating temperature. The position of the rotary valve means that the cross-sections of the respective coolant lines are open to a greater or lesser extent depending on the coolant temperature. The coolant flows with a varying volumetric flow through the small coolant circuit, the large coolant circuit and the heater circuit. Depending on the load request, the crankcase's coolant connection is opened by the electric split cooling valve, thus cooling the crankcase. Large engine operation ranges are covered with the crankcase coolant circuit closed.
Maximum cooling requirement
The maximum cooling requirement is shown at point E of the heat management module circuit diagram.
Maximum cooling requirement, Bx8TU engine
To provide maximum cooling at high dynamic loads and/or high ambient temperatures, the radiator connection is fully opened (100%) and the small coolant circuit is completely closed. Additionally, the heater circuit is 90% closed to achieve the maximum cooling thanks to the maximum coolant volumetric flow through the large coolant circuit.
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Coolant pump
The layout and function of the coolant pump have been revised and adapted to
match the cooling
concept of the Bx8 TU engines.
Coolant pump, Bx8TU engine
Pressure relief valve closed (pr
Crankcase monitoring
On-board diagnosis
Feed-in point of the blow-by gases to the clean air line upstream from the
exhaust turbocharger
Non-return valve
Connection to exhaust turbocharger
Captive screws
Crankcase
SEE MORE:
Control units on the K-CAN2
Roof function center (FZD)
Roof function center (FZD)
Depending on the vehicle equipment the roof function center FZD includes the
corresponding
components for:
Alarm system
Control, slide/tilt sunroof
Gesture recognition camera
Emergency call button
On vehicles with gesture control, the ges
Front/Rear seats
Front seats
Memory sports seat, driver's side, front
Memory seat and memory sports seat, driver's side, front
Fuses in the power distribution box, front right
Exterior mirror, front passenger's side
Body Domain Controller (BDC)
CAN terminator
Motor, longitudinal seat adjustment
Motor, seat a
