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:
Jan. 31, 1995
Filed:
Dec. 14, 1993
Kenji Ikuta, Rolling Hills Estates, CA (US);
Shigenori Isomura, Kariya, JP;
Toshihiro Suzumura, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A fuel injection system for a multi-cylinder internal combustion engine is provided. This fuel injection system includes a plurality of fuel injection valves each arranged to inject fuel into an intake port of each cylinder of the engine, an air passage connected to a portion of an air intake passage leading to the intake ports, a plurality of branch air passages each communicating with a preselected portion around an injection nozzle of each fuel injection valve, an air control valve, connecting between the air passage and the plurality of branch air passages, for selectively introducing a portion of intake air in the air intake passage to the preselected portions around the injection nozzles of the fuel injection valves. The air control valve is arranged to selectively assume first and second valve positions, the first valve position being to establish communications between the air passage and the branch air passages in sequence according to rotation of the engine, the second valve position being to establish communication between the air passage and all the branch air passages to supply the intake air in the air passage uniformly to all the branch air passages when an opening period of time during which one of the fuel injection valves is open partly overlaps with that of another fuel injection valve.