| 摘要 |
A system and method for controlling the introduction of purge fuel vapor into a multi-cylinder internal combustion engine is provided. According to one aspect of the disclosure, a schedule for opening and closing an on-off, pulse-width-modulated, purge control valve is predetermined, and the purge control valve is opened and closed according to the predetermined schedule. According to one aspect of the disclosure, a predetermined schedule can include a repeating sequence of on-pulse frequencies.
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