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
System structure
The belt drive consists of following components:
• Torsional vibration damper
• Starter motor
• Alternator
• A/C compressor
• Belts
• Tensioning pulleys or one idler pulley
