Estimation apparatus of alcohol component amount in fuel

Details Estimation apparatus of alcohol component amount in fuel Estimation apparatus of alcohol component amount in fuel

2008-12-23

2010-06-15

Huynh, Hai H (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S480000, C123S520000

Reexamination Certificate

active

07739025

ABSTRACT:
An estimation apparatus includes: a learning prohibition unit, configured to prohibit a learning unit from executing a learning control and retain a learning value, which is set just before prohibiting, as a fixed learning value which is a fixed value, when the fuel component amount estimation condition is satisfied; an air-fuel ratio correction amount computation unit, configured to compute a correction amount of the air-fuel ratio based on the feedback correction value and the fixed learning value, when the fuel component amount estimation condition is satisfied; an injection correction value change rate computation unit, configured to compute a change rate of the correction amount; an alcohol component correction value computation unit, configured to compute an alcohol component correction value based on the change rate; and an alcohol component amount estimation unit, configured to estimate an alcohol component amount in fuel based on the alcohol component correction value.

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patent: 2009/0082947 (2009-03-01), Tashima
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patent: 2009-144574 (2009-07-01), None
patent: 2009-156054 (2009-07-01), None

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