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.
READ NEXT:
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:
Split cooling valve
Heat management module with electric split cooling valve
Electric split cooling valve
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
Digi
Calls with multiple parties
General information
You can switch between calls or connect two
calls to a single conference call. These functions
must be supported by the mobile phone and
service provider.
Accepting a call while speaking to
another party
If a second call comes in during an ongoing call,
a call waiting signal soun
