Auxiliary unit
As auxiliary unit is called to distinguish from a main unit all the auxiliary equipment of a vehicle that cause no direct his movements.
These include, for example:
- Auxiliary power unit
- Starter
- alternator
- Lubricant pump
- Hydraulic pump (e.g. for power steering )
- Cooling water pump
- Fuel pump
- Injection pump
- Dosing pump
- Fan for the cooler
- Compressor of the air conditioner , the air brake or to the boot of the motor
- turbocharger
- Brake booster
- Steering gear of a ship
Ancillary units are driven either directly (via V-belts or gear wheels) or indirectly (electrically or hydraulically) by the vehicle drive engine. Due to the greater flexibility, the use of electrically operated ancillary units is now gaining acceptance in vehicle construction, which enables greater flexibility at the assembly site. In addition, an electrically operated auxiliary unit is independent of the vehicle's main drive, which means that it remains functional even when the vehicle is stationary, for example when the vehicle is in “stop and go” mode. Electrically driven auxiliary units also help to save energy, as the drive only runs when required and does not have to be dragged along by the V-belt all the time.
Ancillary units require energy and therefore usually contribute to fuel consumption .
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- ↑ a b Google Books . In: Handbook Internal Combustion Engine - Basics, Components, Systems, Perspectives . Richard van Basshuysen, Fred Schäfer. Retrieved November 19, 2009.
- ↑ BMW electric power steering: [1] , as of May 1, 2010