Honda Giken Kogyo Kabushiki Kaisha

Atsushi Ishii

Hiroshi Maruyama

Koichi Yoshiki

Naoto Fujimura

Minoru Arai

A deviation DGAIR between a first induction air volume GAIRTH that is calculated (S) based on a detected value (Gair) of an air flow meter and a second induction air volume GAIRPB that is calculated (S) based on an absolute pressure (PBA) is calculated (S), and a mean value DGAIRAVE of the deviation DGAIR is calculated (S, S), whereby when a difference DDGAIR between the deviation DGAIR and the mean value DGAIRAVE is larger than a predetermined value DGAIL1 (or when a correction mode AFMMODE is 1), secondary air is determined to be supplied to an engine, and the first induction air volume GAIRTH is then corrected (S, S).

Internal combustion engine induction air volume calculating apparatus

A control system for an internal combustion engine having an exhaust system provided with a catalyst is provided. The control system comprises a catalyst temperature rise accelerating control in which the intake air amount is increased and the ignition timing is retarded according to the engine rotational speed. A transient control from the catalyst temperature rise accelerating control to the normal control, is started when the speed of a vehicle driven by the engine reaches a predetermined vehicle speed or higher during the catalyst temperature rise accelerating control. During the transient control, the intake air amount is gradually reduced and the ignition timing is set according to the vehicle speed.

Growing community of inventors

Saitama, Japan

Atsushi Ishii