🔍 Key Concepts

• Airflex clutch operation in diesel propulsion systems • Effect of a restricted orifice on air flow, pressure build‑up, and pressure release • Difference between inflation (engaging) and deflation (disengaging) of an air clutch

💭 Think About

• When you restrict air flowing into a chamber, what happens to the speed of pressure increase and the time it takes to engage? • When you restrict air flowing out of a chamber, what happens to the speed of pressure drop and the time it takes to disengage? • In a system with clutches that must not engage too abruptly, which phase—inflation or deflation—do we usually want to smooth or slow down to protect machinery?

✅ Before You Answer

• Be clear which direction the air is flowing through the restricted orifice during normal clutch engagement. • Decide whether the system designer wants to slow down engagement, slow down disengagement, or speed up one of these actions. • Match that desired effect to the choice that correctly describes the time change (delay or reduction) and whether it applies to inflation or deflation.