Controller of internal combustion engine

Details Controller of internal combustion engine Controller of internal combustion engine

2011-08-02

2011-08-02

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Diverse fuel supply

C701S114000

Reexamination Certificate

active

07987838

ABSTRACT:
A controller of an internal combustion engine includes: a purge controller, operable to control a purge amount of the vaporized fuel purged to an air intake system; an exhaust air-fuel ratio detector; an air-fuel ratio feedback controller; a period determiner, operable to determine whether it is an estimation enabling period; and an alcohol concentration estimator, operable to estimate the alcohol concentration. When the purge of the vaporized fuel is cut during the estimation enabling period, the purge controller: performs control so that the purge is cut with a large degree of tailing, in an operation region where a load of the internal combustion engine is high and a rotation speed is high; and performs control so that the purge is cut with a smaller degree of tailing than the large degree of tailing, in an operation region where the load of the internal combustion engine is low and the rotation speed is low.

REFERENCES:
patent: 6975933 (2005-12-01), Abe et al.
patent: 2004-251135 (2004-09-01), None

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