BMW 3: Engine Mechanical
BMW 3 Series G20 (2018-2026) Training manual / B46TU-B48TU Engines / Engine Mechanical
- Engine housing, Crankshaft drive
- Connecting rod - Crankshaft drive
- IROX coating - Crankshaft drive
- Chain drive - Crankshaft drive
- Chain tensioner
- Valve gear
- Belt drive
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Engine housing, Crankshaft drive
Engine housing
Cylinder head
The cylinder head is made of aluminum.
Only slight modifications have been made to the B46TU head compared to the B46.
Cylinder head
Crankshaft drive
Crankshaft
Comparis
Connecting rod - Crankshaft drive
Connecting rod
Piston
Area transferring the force
Wrist pin
Connecting rod bearing with shaped bore hole
Connecting rod
Connecting rod bearing (B46TU only)
Small connecting rod eye (trapezoid
IROX coating - Crankshaft drive
Detailed magnification of the IROX coating
IROX-coated bearing shell
Oil film
IROX coating
Bearing shell
Binding resin
Hard particle
Solid lubricant
The IROX coating is applied to a conventi
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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
Dual-mass flywheel
In order to reduce fuel consumption and CO2 emissions, high-charged engines
are used, the number
of cylinders is reduced and the drivable speeds are lowered.
However, with these measures the torsional vibrations of the crankshaft are
increased as a result of
the acceleration during the work cycle
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