Other

Daihatsu Motor Company, Ltd.

Diamond Electric Mfg. Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Morito Asano

Yoshiyuki Fukumura

Atsushi Ito

Mitsuhiro Izumi

Teruji Ichihara

Mamoru Yoshioka

Manabu Takeuchi

Sadao Takaki

Katsuyuki Kajitani

Kouichi Kitaura

Kouichi Satoya

Nariki Maeda

Shinpei Isobe

Kiyotaka Yamazaki

The present invention is an operation control method on the basis of an ion current in an internal combustion engine, the method comprising a step of detecting the ion current generated within a combustion chamberso as to control an operating state of the internal combustion engineon the basis of a state of the detected ion current, wherein a control at an engine start point in time on the basis of the state of the ion current is stopped for predetermined cycles just after the engine start.

Operation control method on the basis of ion current in internal combustion engine

The arrangement for mounting a sparkplug of an internal combustion engine includes mounting the sparkplug so that all of the outside electrodes are arranged at an intake port side area and/or an exhaust port side area. Alternatively, in the case where at least one of the outside electrodes is located outside of the above-mentioned areas, no other remaining outside electrodes are arranged at a position that faces that outside electrode across the central electrode.

Arrangement for mounting a sparkplug of an internal combustion engine

There is provided an improved method of detecting an occurrence of a knock in an internal combustion engine by detecting an ionic current flowing in a cylinder of the engine from initiation of combustion therein and judging a knock component overlapping the ionic current based on a judging level, the method including the steps of: detecting a peak value of the ionic current; and relatively correcting at least one of the judging level and the knock component based on the peak value thus detected so as to make more difficult a judgment of whether the knock occurs or not as the detected peak value increases.

Method of detecting a knock in an internal combustion engine by means of ionic current

An object of the invention is to detect an upper limit of a lean burn zone in an internal combustion engine in each ignition. The lean limit is detected on the basis of the characteristics of the ionic current in a cylinder of the engine immediately after ignition.

Method for detecting lean limit by means of ionic current in an internal

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Osaka, Japan

Morito Asano