DI Diesel Engines M57/M67 - Common Rail Sec. 3 P.1
Course contents/Background material
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
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