A control device of an internal-combustion engine - TOYOTA JIDOSHA KABUSHIKI KAISHA

Title:

A control device of an internal-combustion engine

Document Type and Number:

Japanese Patent JP6149828

Kind Code:

B2

Abstract:

An electronic control unit executes air-fuel ratio control composed of main feedback correction and sub-feedback correction. The main feedback correction uses an output value of an upstream side sensor in upstream side of a catalyst. The sub-feedback correction uses an output value of a downstream side sensor in downstream side of the catalyst. When there are cylinder-to-cylinder variations in a fuel injection amount of each fuel injection valve, the electronic control unit corrects the fuel injection amount. Each time the degree of the cylinder-to-cylinder variations is lower than or equal to a first predetermined value, the electronic control unit stores the sub-learning value at that point in time as a normal value, and, when the degree of the cylinder-to-cylinder variations is higher than or equal to a second predetermined value, the electronic control unit changes the sub-learning value to the stored normal value.

Inventors:

Morihiro Kinji

Application Number:

JP2014178370A

Publication Date:

June 21, 2017

Filing Date:

September 02, 2014

Export Citation:

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