Clutch engagement basics: The flywheel and pressure plate clamp (bind) the clutch disc between them so that the engine and the transmission input shaft rotate together when engaged. Is this statement correct?

Difficulty: Easy

Correct Answer: Yes

Explanation:


Introduction / Context:

A friction clutch connects and disconnects engine torque to the gearbox. Understanding which components clamp the clutch disc and how torque is transmitted is foundational for diagnosing slip, chatter, and engagement issues. The statement references the flywheel, pressure plate, and driven disc—key elements of a typical single-plate dry clutch.


Given Data / Assumptions:

  • Single-plate dry clutch with diaphragm spring pressure plate.
  • Friction facings bonded to both sides of the clutch disc.
  • Release mechanism disengages the pressure plate when the pedal is pressed.


Concept / Approach:

In the engaged state, the diaphragm spring pushes the pressure plate against the clutch disc, clamping it against the flywheel. Friction between the flywheel face and pressure plate face with the disc facings transmits torque from the engine to the transmission input shaft via the disc hub and splines. Thus, flywheel + pressure plate bind the disc to couple engine and gearbox.


Step-by-Step Solution:

1) Pedal released → diaphragm spring loads the pressure plate.2) Disc is clamped between flywheel and pressure plate → friction lock.3) Engine torque passes through disc hub splines to the gearbox input shaft.


Verification / Alternative check:

Service manuals show that pressing the pedal retracts the pressure plate via the release bearing, unclamping the disc and allowing relative slip—confirming that clamping is the mechanism for engagement when the pedal is released.


Why Other Options Are Wrong:

  • No / free-wheeling: contradicts clutch operation; free-wheeling occurs only when disengaged.
  • Only multi-plate / only at idle: the described mechanism applies to single-plate designs and all speeds within torque capacity.


Common Pitfalls:

  • Confusing release-bearing action (pedal down) with engagement (pedal up).
  • Ignoring that inadequate clamp load or worn facings cause slip despite the intended clamping.


Final Answer:

Yes

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