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:
Dec. 25, 1979
Filed:
May. 08, 1978
Nippon Soken, Inc., Nishio, JP;
Abstract
A fuel injection system for an internal combustion engine has two sets of fuel injectors mounted on the engine so that each engine cylinder is provided with two injectors. A fuel metering and distributing device meters a fuel under pressure from a fuel source and distributes the metered fuel to respective injectors. The fuel metering and distributing device includes a housing provided with a fuel inlet connected to the fuel source and two sets of fuel outlet ports each connected to one of the fuel injectors. A rotor is mounted in the housing for rotation in timed relationship to the engine operation and is provided with an axial fuel passage always in communication with the fuel inlet. Two orifices are formed in the peripheral wall of the rotor in communication with the fuel passage while two sets of apertures each communicated with one of the fuel outlet ports are formed either in the housing or in a control shaft disposed in the housing in telescopic relationship to the rotor. The rotation of the rotor brings at least one of the orifices therein into overlapping and communicating relationship to successive apertures of the corresponding set so that the fuel flows from the fuel passage through the overlapped and communicated orifice and apertures to the associated fuel outlet ports and thus to the associated fuel injectors. Relative movement between two orifices and two sets of apertures axially of the rotor is caused when the rate of engine intake air flow is varied. The arrangement is such that, when the rate of the intake air flow is within a first range smaller than a predetermined rate, only one of the orifices is brought into overlapping and communicating relationship to successive apertures of the associated set and such that, when the intake air flow rate is within a second range greater than the predetermined rate, both orifices are brought into overlapping and communicating relationship to successive apertures of the two sets, respectively, whereby fuel supply to respective engine cylinders is increased when the intake air flow rate is increased beyond the predetermined rate.