Renault Clio: Fuel vapour recirculation circuit: Function

Renault Clio III (2005-2013) Service Manual / Engine And Peripherals / Antipollution / Fuel vapour recirculation circuit: Function

D4F or F4R or K4J or K4M or M4R

WARNING

The breather must not be blocked during normal engine operation.

The tank is vented through the fuel vapour absorber.

Fuel vapour is trapped by the active carbon contained in the absorber as it passes through.

Fuel vapour trapped in the absorber is eliminated and burnt by the engine.

To do this, the solenoid valve is used to connect the fuel vapour absorber and the inlet manifold. This solenoid valve is located on the right-hand shock absorber turret or on the inlet manifold (M4R engine).

The principle behind the solenoid valve is to open a passage of variable size (according to the opening cyclic ratio signal sent by the injection computer).

The variation in the passage opened for fuel vapour in the solenoid valve results from the balance between the magnetic field created by the supply to the winding and the return spring force attempting to close the solenoid valve.

Fuel vapour recirculation circuit: Operating diagram

D4F or F4R or K4J or K4M or M4R

OPERATING DIAGRAM OF THE CIRCUIT

F4R or K4J or K4M or M4R - D4F, and 740 or 742 or 764

Renault Clio. Fuel vapour recirculation circuit: Operating diagram

  1. Inlet distributor
  2. Fuel vapour absorber bleed solenoid valve
  3. Petrol vapour absorber
  4. Tank
  5. Fresh air vent

D4F, and 784 or 786

Renault Clio. Fuel vapour recirculation circuit: Operating diagram

  1. Inlet distributor
  2. Fuel vapour absorber bleed solenoid valve
  3. Fuel vapour absorber
  4. Tank
  5. Fresh air vent
  6. Anti-return valve
  7. Turbocharger
  8. Air filter unit
  9. Air filter box air outlet pipe

Fuel vapour recirculation circuit: Check

F4R or K4J or K4M or M4R - D4F

Renault Clio. Fuel vapour recirculation circuit: Check

I - CHECKING THE OPERATION OF THE FUEL VAPOUR ABSORBER BLEED

Note: A fault with this system may result in rough idling or the engine stalling.

F4R or K4J or K4M or M4R - D4F, and 740 or 742 or 764

Renault Clio. Fuel vapour recirculation circuit: Check

  1. Inlet distributor
  2. Fuel vapour absorber bleed solenoid valve
  3. Petrol vapour absorber
  4. Tank
  5. Fresh air vent

D4F, and 784 or 786

Renault Clio. Fuel vapour recirculation circuit: Check

  1. Inlet distributor
  2. Fuel vapour absorber bleed solenoid valve
  3. Petrol vapour absorber
  4. Tank
  5. Fresh air vent
  6. Anti-return valve
  7. Turbocharger
  8. Air filter unit
  9. Air filter box air outlet pipe

II - FUEL VAPOUR ABSORBER BLEED CONDITIONS

Fuel vapour absorber: Removal - Refitting

D4F or F4R or K4J or K4M or M4R

IMPORTANT

During this operation, be sure to:

IMPORTANT

Wear latex gloves during the operation.

WARNING

To avoid any corrosion or damage, protect the areas on which fuel is likely to run.

REMOVAL

I - REMOVAL PREPARATION OPERATION

II - OPERATION FOR REMOVAL OF PART CONCERNED

Renault Clio. Fuel vapour absorber: Removal - Refitting

REFITTING

I - REFITTING OPERATION FOR PART CONCERNED

II - FINAL OPERATION.

Fuel vapour absorber: Check

D4F or F4R or K4J or K4M or M4R

Renault Clio. Fuel vapour absorber: Check

I - CHECKING THE FUEL VAPOUR ABSORBER

Is there a vacuum?

II - CHECKING THE FUEL VAPOUR ABSORBER TANK CONNECTION

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