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

Pressure Sensor [Two Step Deployment Control System]
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Room Light Control System
Outline The room light control system changes the illumination condition and illumination level of the interior lights (door position) according to whether the doors are opened/closed and ...

Other materials:

Liquid Crystal Display (LCD)
Outline The LCD displays vehicle information in the instrument cluster. The instrument cluster performs LCD fail-safe.. Function/Construction The instrument cluster configures the indication of the LCD based on the CAN signals sent from the related modules and displays ...

Radiator
Purpose, Function The radiator disperses the engine coolant heat flowing internally by receiving against the vehicle while it is driven or air flow produced by the cooling fan. Construction The radiator is installed to the front of the engine compartment. Four mounting ...

Hood
Purpose/Function The hood is constructed with a large space between the front end of the hood and the engine to absorb an impact. Construction The hood stiffener positioned at the front end of the hood is shaped so that it collapses easily during an impact. In addition, the ...

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