Division 3.6 Transmission Power Take-Off (PTO)
United Kingdom
For vehicles with PTO and/or PTO drive mechanism installed on the transmission, the power consumption shall be considered by determined standard values. The corresponding standard values represent these power losses in usual drive mode when the PTO is switched off/disengaged. F1Application related power consumptions at engaged PTO are added by the simulation tool and are not described in the following.
Table 10
Mechanical power demand of switched off/disengaged power take-off
| Design variants regarding power losses (in comparison to a transmission without PTO and / or PTO drive mechanism) | |||
|---|---|---|---|
| Additional drag loss relevant parts | PTO incl. drive mechanism | only PTO drive mechanism | |
| Shafts / gear wheels | Other elements | Power loss [W] | Power loss [W] |
| only one engaged gearwheel positioned above the specified oil level (no additional gearmesh) | — | — | 0 |
| only the drive shaft of the PTO | tooth clutch (incl. synchroniser) or sliding gearwheel | 50 | 50 |
| only the drive shaft of the PTO | multi-disc clutch | 1 000 | 1 000 |
| only the drive shaft of the PTO | multi-disc clutch and oil pump | 2 000 | 2 000 |
| drive shaft and/or up to 2 engaged gearwheels | tooth clutch (incl. synchroniser) or sliding gearwheel | 300 | 300 |
| drive shaft and/or up to 2 engaged gearwheels | multi-disc clutch | 1 500 | 1 500 |
| drive shaft and/or up to 2 engaged gearwheels | multi-disc clutch and oil pump | 3 000 | 3 000 |
| drive shaft and/or more than 2 engaged gearwheels | tooth clutch (incl. synchroniser) or sliding gearwheel | 600 | 600 |
| drive shaft and/or more than 2 engaged gearwheels | multi-disc clutch | 2 000 | 2 000 |
| drive shaft and/or more than 2 engaged gearwheels | multi-disc clutch and oil pump | 4 000 | 4 000 |