Honda Giken Kogyo Kabushiki Kaisha

Kozo Suzuki

Norio Tomobe

Yuji Fujiki

Haruo Shimamura

Yoshiharu Ave

Hiroaki Iwasaki

Yutaka Taniguchi

Junichi Koseki

An air-fuel ratio control method which controls the amount of the intake side secondary air in accordance with either the engine temperature or both of the engine temperature and the intake air temperature upon the engine re-start under a high engine temperature, thereby avoiding enrichment of the intake air-fuel ratio even at the occurrence of the percolation phenomenon and to improve the engine-start property. Furthermore, the amount of the intake side secondary air is controlled until the start of the air-fuel ratio feedback control to accomplish improvement in the purification of the exhaust gases and in the stability of the engine speed at an idle state.

Air-fuel ratio control method for an internal combustion engine

A method of controlling the air/fuel ratio for an internal combustion engine set a base value of air/fuel ratio control in accordance with detected engine parameters, and the base value is corrected by a base correction value in order to compensate for the error of the base value. The speed of change in the correction value in the learning control operation is increased when the engine speed is low, or for a predetermined time period after a hot starting of the engine.

Method of controlling the air/fuel ratio for an internal combustion

Growing community of inventors

Wako, Japan

Kozo Suzuki