Method of compensating for boil-off alcohol in a flexible fueled

Details Method of compensating for boil-off alcohol in a flexible fueled Method of compensating for boil-off alcohol in a flexible fueled

1999-02-18

1999-12-14

Kwon, John

Internal-combustion engines

Miscellaneous

Fuels, lubricants and additives

123681, 123683, 123686, F02B 7512

Patent

active

060003677

ABSTRACT:
A method is provided for controlling the combustion parameters of an internal combustion engine without a PCV solenoid during a boil-off condition. The methodology records the temperature of the engine when the vehicle is turned off. When the vehicle is restarted, the methodology determines the amount the engine has cooled since it was shut down. Based on the difference in engine temperature and the current engine temperature, the methodology determines the amount of boil-off corruption remaining. The methodology then determines a new boil-off corruption fuel multiplier based on the amount of boil-off corruption remaining. The new boil-off corruption fuel multiplier is used to modify fuel control until the boil-off condition ceases.

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