The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1996
Filed:
Jan. 25, 1995
Takashi Komatsuda, Wako, JP;
Hiroaki Kato, Wako, JP;
Yuichi Shimasaki, Wako, JP;
Akihisa Saito, Wako, JP;
Toshikazu Oketani, Wako, JP;
Takuya Aoki, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
In a multi-cylinder internal combustion engine including a plurality of fuel injection valves corresponding to a plurality of cylinders, respectively, and a catalytic converter provided in an exhaust system common to the cylinders, the concentration of oxygen in the exhaust gas from the engine is precisely controlled in accordance with the operational condition of the engine in a low-temperature state of the engine for the prompt activation of the catalyst. When the engine is at a low temperature, the operation of the fuel injection valves is controlled so as to stop the supplying of a fuel into the particular cylinders and, the operation of a valve operating characteristic changing means is controlled to adjust the amounts of air drawn and discharged on the basis of conditions detected by operational condition detecting means and at such low temperature to thereby control the oxygen supplied to the catalyst in the catalytic converter whereby the activity of the catalyst can be controlled.