Kia Picanto (JA): Emission Control System / Evaporative Emission Control System

Kia Picanto (JA) 2017-2026 Service & Repair Manual / Emission Control System / Evaporative Emission Control System

Description and operation

Description

Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to the canister filled with charcoal and the canister temporarily holds the vapor in the charcoal.

If ECM determines to draw the gathered vapor into the combustion chambers during certain operating conditions, it will use vacuum in intake manifold to move it.

Schematic diagrams

Schematic Diagram

1. Air cleaner
2. Delivery pipe & injector
3. Engine
4. Purge control solenoid valve (PCSV)
5. Low pressure fuel pump

6. High pressure fuel pump
7. Fuel filler neck
8. Fuel filler cap
9. Fuel tank

Canister

Canister is filled with charcoal, which absorbs evaporated vapor in fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate conditions are met.

Purge Control Solenoid Valve (PCSV)

Purge Control Solenoid Valve (PCSV) is installed in the passage connecting canister and intake manifold. It is a duty type solenoid valve and is operated by ECM/PCM signal.

To draw the absorbed vapor into the intake manifold, the ECM/PCM will open the PCSV, otherwise the passage remains closed.

Fuel Filler Cap

A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which would seal the fuel filler. After the gasket on the fuel filler cap and the fill neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.

❮Positive Crankcase Ventilation (PCV) Valve

Description and operation Operation Principle Repair procedures Removal 1. Disconnect the vapor hose (A). 2. Remove the PCV valve (B).

Canister❯

Repair procedures Removal 1.Turn the ignition switch OFF and disconnect the battery negative (-) terminal. 2.Remove the fuel tank assembly. (Refer to Fuel System - "Fuel Tank") 3.

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