Nissan Motor Company Limited

Yoshio Ookubo

Kenji Masaki

Hatuo Nagaishi

Suzuo Suzuki

Mitinobu Konno

Masayasu Nakajima

Ken-ichi Koizumi

A temperature sensor is disposed at the upstream or middle portion of a reactor for oxidizing the unburned constituents contained in the exhaust gases discharged from the combustion chambers of the engine. The air-fuel ratio of the air-fuel mixture supplied to the combustion chambers is controlled so as to maintain the temperature of the upstream or middle portion of the reactor at the predetermined level in the vicinity of but higher than the temperature corresponding to the critical point where the temperature of the downstream portion of the reactor begins to decrease.

I.C.E. equipped with means for maintaining reactor temperature about a

A fuel vaporizer supplies fuel into a thermal reactor for promoting oxidative purification of unburned components of exhaust gases in presence of secondary air. The additional fuel is injected upstream into the gas stream flowing through a conduit to the fuel vaporizer.

Internal combustion engine exhaust gas after-burning system

An exhaust cleaning system for use with an automotive multiple-cylinder internal combustion engine including first and second groups of engine cylinders which are to be alternately fired, comprising a thermal reactor composed of an outer tubular structure formed with a first group of exhaust inlet ports leading from the first group of engine cylinders and a second group of exhaust inlet ports leading from the second group of engine cylinders, an inner tubular structure positioned within the outer tubular structure and formed with openings, and at least one air-injection nozzle opening in a longitudinal end portion of the interior or a re-combustion chamber of the inner tubular structure, wherein exhaust gases from each of the first group of engine cylinder are fired in the vicinity of the nozzle openings with the agency of secondary air injected from the nozzle and exhaust gases from each of the second group of engine cylinders are fired by the resultant hot gases advancing through a hot zone of the re-combustion chamber. Additional secondary air and/or secondary fuel may be admixed to the exhaust gases preferably during low-load condition of the engine when the temperature of the exhaust gases lowers.

Exhaust cleaning system for internal combustion engine

An elongate outer hollow member encloses an elongate inner hollow member to form an annular passage therebetween which communicates with an exhaust gas inlet of the outer hollow member. The inner hollow member has a combustion chamber defined therein, a plurality of ports formed through a closed upstream end portion and opening from the exhaust gas inlet into the combustion chamber for injection of a portion of exhaust gas thereinto and a plurality of ports formed through a side portion and opening from the annular passage into the combustion chamber for injection of the remaining portion of exhaust gas thereinto. An secondary air injection means is disposed in the combustion chamber adjacent to the closed end portion and upstream of the ports in the side portion for injection of secondary air into the combustion chamber.

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Yokohama, Japan

Yoshio Ookubo