Engine fuel injection control system

Details Engine fuel injection control system Engine fuel injection control system

2005-06-21

2005-06-21

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Using multiple injectors or injections

C123S344000

Reexamination Certificate

active

06907858

ABSTRACT:
An engine fuel injection control system is configured to alleviate the torque fluctuation that occurs due to deviation in a pilot injection timing when the excess air ratio is changed suddenly from lean to rich. When the excess air ratio changes by a large amount, the pilot injection interval is changed in accordance with the actual excess air ratio by executing an interpolation calculation based on the target excess air ratio and the actual excess air ratio. During the transient period when the actual excess air ratio is converging toward the target excess air ratio, the pilot injection interval is changed in accordance with the change in the actual excess air ratio. As a result, it is possible to alleviate torque fluctuation by suppressing the tendency of the pilot injection interval to change rapidly in a step-like manner between target values before and after the excess air ratio changes.

REFERENCES:
patent: 6412469 (2002-07-01), Itoyama et al.
patent: 2002-155783 (2002-05-01), None

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