Ancillary Components And Belt Drive; Brief Description; Requirements And Objectives - BMW M57 Service Training

DI Diesel Engines M57/M67 - Common Rail

Ancillary components and belt drive

Brief description

Various ancillary components are driven by the crankshaft of the
engine with the aid of one or two drive belts.
The belt is routed over deflection pulleys in order to ensure
sufficient hold (adhesion) about the drive wheels.
Tensioning rollers subject the belt to the necessary preload.
The ancillary components fulfil various tasks only when the
engine is running.

Requirements and Objectives

The following requirements and objectives apply to the ancillary
components and belt drive.
• Requirements
- Slip-free drive of ancillary components
Maintenance-free
- Optimum power output of ancillary components
• Objectives
- Improvement of noise characteristics
- Increase in charge levels in the lower speed range
© BMW AG, Service Training
Course contents/Background material
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Sec. 3 P.1