BMW 3: Operating temperature
The positions of the rotary valve at engine operating temperature are shown by area C of the heat management module circuit diagram.
Operating temperature
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 electrical 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
To provide maximum cooling at high dynamic loads and/or high ambient temperatures, the radiator connection is fully opened (100%) and the bypass line 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 B46TU/B48TU engines.
Coolant pump
Pressure relief valve closed (pressure <
Exhaust System
Exhaust turbocharger
Exhaust turbocharger
The exhaust turbocharger can be replaced individually and is exclusively made
of steel. The boost
charge pressure is still controlled by an electrical waste
Fuel System
The fuel system is made up of the fuel supply and fuel preparation systems.
The fuel supply includes
the fuel tank with all mounted parts and the fuel lines up to the engine
compartment.
The fuel p
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Coordinating the charging procedure
Coordination for starting and ending the charging procedure is performed by
the high-voltage power
management in the EME.
The following actions required by the customer at the start of the charging
procedure:
Adjust the desired charge current level in ampere
Set the start time for charging
Co
Tire inflation pressure
General information
The tire characteristics and tire inflation pressure
influence the following:
The service life of the tires.
Road safety.
Driving comfort.
Fuel consumption.
Safety information
Warning
A tire with too little or no tire inflation pressure
may heat up significantly and sustai
