Honda Giken Kogyo Kabushiki Kaisha

Masashi Uchiyama

Fumio Hosoda

Teruo Wakashiro

Sachito Fujimoto

Kazumi Yamazaki

Toshikazu Oketani

Hideo Moriwaki

Kazuhito Kakimoto

Yoshiharu Abe

Yoshiharu Ave

Masayuki Habaguchi

Toru Tochizawa

An evaporative fuel-purging control system for an internal combustion engine includes a mass flowmeter arranged across a purging passage of the engine for measuring a flow rate of a mixture of evaporative fuel and air being purged. A desired flow rate of the mixture is set according to operating conditions of the engine. The desired flow rate of the mixture is compared with a measured flow rate of the mixture obtained by the mass flowmeter, and the opening of a purge control valve arranged across the purging passage is controlled based on results of the comparison.

Evaporative fuel-purging control system for internal combustion engines

A mass flowmeter outputs an output value indicative of the flow rate of a gaseous mixture containing evaporative fuel and being purged into the intake system of an internal combustion engine. A calculated value of the flow rate of the mixture is obtained based on a plurality of operating parameters of the engine. The actual flow rate of the mixture and/or the actual flow rate of the evaporative fuel are/is calculated based on the output value from the mass flowmeter and the calculated value based on the engine operating parameters. The concentration of the evaporative fuel is calculated from the calculated actual flow rates of the evaporative fuel and the mixture. The calculated actual flow rate is compared with a desired flow rate value, and a purge control valve is controlled based on results of the comparison. A basic amount of fuel supplied to the engine is corrected based on the calculated actual flow rate of the evaporative fuel.

Evaporative fuel-purging control system and air-fuel ratio control

Growing community of inventors

Wako, Japan

Masashi Uchiyama