• When the following conditions are met, the evaporative purge control sends a duty signal to the purge solenoid valve.
• The duty ratio of the duty signal (ratio of on time per 1 cycle) is calculated based on the amount of purge flow and the differential pressures of the injectors. The amount of purge flow is determined by the estimated intake air passage pressure and BARO calculated by the engine speed and charging efficiency. The differential pressure of the injectors is determined by the BARO and the estimated intake air passage pressure.