Title:
【発明の名称】内燃エンジンの空燃比フィードバック制御方法
Document Type and Number:
Japanese Patent JP2694729
Kind Code:
B2
Abstract:
A method of controlling the air-fuel ratio of a mixture being supplied to an internal combustion engine, in a feedback manner responsive to output from an O2 sensor arranged in the engine exhaust system for sensing the concentration of a component in exhaust gases from the engine to produce as the output a normally fluctuating output signal indicative of the concentration. The air-fuel ratio is controlled to a desired value by means of at least one of proportional control applying a first correction value to correct the air-fuel ratio when the output signal changes from a rich side to a lean side or vice versa with respect to a predetermined reference value, and integral control applying a second correction value to correct the air-fuel ratio whenever a predetermined period of time elapses so long as the output signal remains on the lean side or on the rich side with respect to the predetermined reference value. At least one of the first and second correction values is set to a smaller first value as load on the engine is higher, and the set at least one correction value is applied to correction of the air-fuel ratio in a direction of enriching the mixture.
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Inventors:
Shuichi Hosoi
Fujimoto Yukito
Fujimoto Yukito
Application Number:
JP7833787A
Publication Date:
December 24, 1997
Filing Date:
March 31, 1987
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F02D41/00; F02D41/14; (IPC1-7): F02D41/14
Domestic Patent References:
| JP61112759A | ||||
| JP61272432A |
Attorney, Agent or Firm:
Toshihiko Watanabe