BMW 3: Connecting rod - Crankshaft drive
BMW 3 Series G20 (2018-2025) Training manual / B46TU-B48TU Engines / Engine Mechanical / 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 (trapezoidal shape)
- Large connecting rod eye (cracked)
- Connecting rod bolts of the connecting rod bearing cap
- Connecting rod bearing shell of the connecting rod bearing cap
- Connecting rod bearing shell of the connecting rod (IROX-coated)
The drop-forged cracked connecting rods with IROX coating are known from the B38/B46 engines.
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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
Chain drive - Crankshaft drive
Features:
Chain drive at the side of the engine emitting the forces.
Single-part chain drive for driving the camshafts.
Single sleeve-type chain 8 mm.
Electric motor of the combined oil-vacu
Chain tensioner
Chain tensioner
Tensioning rail
Sealing sleeve
Chain tensioner with screw thread
Due to the cylinder head manufacturing process, the chain tensioner now has a
sealing sleeve with a
height of 12
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Introduction
Although the high-voltage battery unit of the G20 PHEV can also be partially
charged by energy
recovery via the electrical machine, the "normal" charging procedure takes place
when the G20 PHEV
is connected to the AC voltage network of the local power supply company. Energy
is taken fro
Coasting
Concept
Under certain conditions the engine is automatically
decoupled from the transmission in the D
selector lever position. The vehicle continues
traveling with the engine idling to reduce consumption.
Selector lever position D remains engaged.
This driving condition is referred to as coasting.
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