ND4472204781 20Y8101260 4210731221 AC Compressor Car RC.600.217 For MAQ KOMATSU WXTK002

ND4472204781 20Y8101260 4210731221 AC Compressor Car RC.600.217 For MAQ KOMATSU WXTK002

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PICTURES

Function of the Clutch in an Automotive A/C Compressor

• The clutch connects the compressor pulley to the engine’s serpentine/accessory belt, allowing the compressor to spin when engaged.
• When disengaged, the pulley freewheels, reducing engine load and improving fuel efficiency.

2. On-Demand Cooling

• The clutch engages only when cooling is needed (e.g., when the A/C is turned on or cabin temperature rises).
• It disengages when the desired temperature is reached or during high engine load (e.g., acceleration) to minimize power loss.

3. System Protection

• Prevents compressor overload by disengaging during low refrigerant pressure (indicating a leak or malfunction).
• Reduces wear on the compressor by stopping rotation when A/C is off.

4. Electromagnetic Operation

• Most clutches are electromagnetically controlled:
• When the A/C is activated, an electrical signal energizes the clutch coil, creating a magnetic field that pulls the clutch plate into contact with the pulley.
• When deactivated, a spring or gap mechanism disengages the clutch.

5. Common Failure Symptoms

• Slipping clutch (poor cooling, burning smell).
• Failed engagement (no cold air due to electrical or coil issues).
• Continuous engagement (leads to compressor overheating).

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