PURGE CONTROL [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
PURGE CONTROL [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
SM2565335
id0140u0203800
Outline
• An appropriate amount of evaporative gas is fed into the intake manifold by the purge solenoid valve operation according to the engine operation conditions. This ensures driveability and prevents release of evaporative gas into the atmosphere.
• The PCM drives the purge solenoid valve based on the signal from each control part.
Block Diagram
atsuzn00000500
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Operation
Determination of purge solenoid valve energization time
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• The PCM calculates the optimum purge flow amount according to mainly the evaporation density, intake air volume, and injection amount of the injector.
Calculation method for purge flow amount
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• The PCM determines the drive duty based on the calculated purge flow amount. The drive duty is corrected by the intake air temperature and the battery voltage.
Operation condition
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• In evaporative purge control during normal driving, the PCM sends a duty signal to the purge solenoid valve when all of the following conditions are met.
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― Fuel injection control is in feedback zone (λ=1)― Engine coolant temperature 60 °C {140 °F} or more
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