Understanding Fan Clutches

What are the two main components of a pulley driven fan clutch?

• Shear plates and viscous fluid

• Pulley and fan blade

• Bimetallic strip and internal valve

• Drive portion and clutch portion

How is the fan clutch engaged in an air engaged fan clutch system?

• By air pressure

• By spring pressure

• By viscous fluid

• By temperature changes

What replaces the spring, air, and friction combination in an air sensing viscous fan clutch?

• Spring pressure

• Air pressure

• Shear plates and viscous fluid

• Bimetallic strip

What is the purpose of the shear plates in a viscous fan clutch?

• To directly touch and engage the clutch

• To increase friction

• To interweave closely without touching

• To separate the drive and clutch portions

What is the role of the bimetallic strip or coil in the fan clutch system?

• To pump viscous fluid through the system

• To control the valve based on temperature changes

• To drive the fan directly

• To engage the clutch through spring pressure

What triggers the opening of the valve in the air sensing viscous fan clutch?

• Air pressure

• Spring pressure

• Temperature changes

• Electrical signals

How does the air sensing viscous fan clutch system engage?

• By centrifugal force moving viscous fluid

• By electrical signals

• By air pressure

• Through spring pressure

What happens when the ambient air temperature decreases in an air sensing viscous fan clutch system?

• Viscous fluid is expelled from the system

• The bimetallic strip contracts, closing the valve

• The valve opens further

• The shear plates disengage