18678 Fan Coupling
FEBI 18678 Fan Coupling
| Category | Engine / Engine Cooling / Visco Clutch |
| Brand | BMW |
| Cross-references | 11 52 1 271 416 | 11 52 1 287 829 | 11 52 1 289 120 | 11 52 1 310 520 | 11 52 1 468 470 | 11 52 1 706 619 | 11 52 1 719 042 | 11 52 1 719 043 | 11 52 1 719 266 | 11 52 1 723 027 | 11 52 1 723 918 | 11 52 1 723 919 | 11 52 1 723 920 | 11 52 1 723 921 | 11 52 1 740 962 | 11 52 9 055 969 | 11521271416 | 11521287829 | 11521289120 | 11521310520 | 11521468470 | 11521706619 | 11521719042 | 11521719043 | 11521719266 | 11521723027 | 11521723918 | 11521723919 | 11521723920 | 11521723921 | 11521740962 | 11529055969 |
For vehicle cooling, the Fan coupling is a crucial part. Fan clutches that are not electrically controlled are still present in older automobiles.
They have two discs with liquid sandwiched between them (silicone oil). The fan blades are attached to one disc, while the engine powers the other. The liquid between the discs is transported by adhesion to the other disc if cooling is necessary, and a bimetallic spring makes sure of this.
An electrically operated fan coupling is the more contemporary variant. While the architecture is identical, the engine control unit's fine regulation takes the place of the bimetallic spring's rough regulation. By doing so, the environment is improved and fuel is saved.
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