3 Series E46 316i (M43TU) SAL
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SPORT button for Dynamic Driving Control FDC
Dynamic Driving Control FDC is activated with the SPORT button: Gearshift times are shortened and the shift
characteristics are made more sporty. The engine responds more spontaneously to changes in the accelerator
pedal position.
Dynamic Driving Control FDC is always deactivated when the engine is started. [more ...]
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Hydraulic unit with sensors
Clutch actions and gear changes are automatically executed with the support of the hydraulic unit and the
sensors. [more ...]
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Gearshift/selector angle actuator
The gearshift/selector angle actuator shifts the selector shaft along its axis and turns the selector shaft
when changing gate. [more ...]
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Shift travel sensor and selector angle sensor
The shift travel and selector angle sensors identify the current transmission position:
The shift travel sensor records the forward/reverse movement of the selector shaft in the respective shift
gate.
The selector angle sensor recognises how far the selector shaft turns, and so recognises a change of shift
gate. [more ...]
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Pressure accumulator
The pressure accumulator is fitted on the bottom left of the transmission and makes sure that there is
always sufficient oil pressure for a gearshift to be executed. A piston subdivides the pressure accumulator
into 2 chambers. One chamber is charged with approx. 27 bar nitrogen at -25
°
C. The second chamber
takes up oil from the hydraulic pump.
The reservoir volume is approx. 285 cm
3
.
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Pressure sensor
The pressure sensor is installed directly on the valve block and reports the current oil pressure to the SMG
control unit. The hydraulic pump is switched on and off as required.
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Clutch actuator with clutch travel sensor
The clutch actuator executes the coupling/decoupling actions. The clutch release travel is recorded by the
clutch travel sensor. [more ...]
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Hydraulic pump
The hydraulic pump with electric motor builds up a system pressure of up to 55 bar and is actuated by the
SMG control unit.
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Sensor for transmission input speed
The sensor records the transmission input speed for comparison with the engine speed. This comparison
allows the SMG control unit to decide the closing speed of the power flow from the engine to the
transmission via the clutch.
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Expansion tank
The expansion tank makes sure that there is always sufficient hydraulic fluid available in the system. In
addition, the oil is able to expand in the expansion tank. The expansion tank has maximum and minimum
marks for checking the oil level. A filter is integrated into the expansion tank for prefiltering the oil.
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Valve block
The valve block holds the solenoid valves, the pressure sensor, the pressure accumulator, a check valve
and a fine filter.
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Solenoid valves
A total of 4 solenoid valves are installed in the valve block.
SBT Sequential manual transmission SMG, based on GS6- 37BZ E46
BMW AG - TIS
19.01.2013 20:44
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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