Chevrolet Spark manuals

Mazda CX-5 Service & Repair Manual: Purge Control

Outline

Block Diagram


Operation

Determination of purge solenoid valve energization time

Calculation method for purge flow amount


Contents

Calculation or determination method of purge flow amount and correction

Target purge flow amount

The target purge flow amount is determined by multiplying the correction for the intake air temperature and the fuel evaporative gas concentration with the purge mass volume. The purge mass volume is calculated from the purge intake rate for the intake air mass volume which differs according to engine conditions.

Correction

Startup correction

Purpose: Prevents a change in the air/fuel ratio due to a purge intake lacking evaporative gas concentration in the charcoal canister.

    During purge control startup

  • Determined according to the target purge flow amount.

Volume decrease correction

Purpose: Decreases the purge flow amount and stabilizes the air/fuel ratio.

    Unstable combustion condition (feedback correction value for fuel injection control is unstable)

  • Determined according to the A/F sensor feedback conditions.


Purge control image


Operation condition

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Room Light Control System
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Other materials:

Rear Window Glass Removal
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Front Console Box Removal/Installation
NOTE: Affix protective tape to the position shown in the figure. 1. Insert a tape-wrapped flathead screwdriver in the position indicated by the arrow in the figure and detach clips A. 2. Pull the front console box in the direction of the arrow (2) and remove it while d ...

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