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:
Aug. 08, 2000
Filed:
Dec. 01, 1998
Kunihiro Umetsu, Anjo, JP;
Akiyoshi Mukaidani, Takahama, JP;
Denso Corporation, , JP;
Abstract
A fuel supply system has a fuel tank in which a sub-tank and a jet pump are installed. The jet pump has a fuel supply passage into which fuel returned from an engine of a vehicle is supplied, and a fuel injection passage having an injection hole at a fuel downstream end thereof. The fuel supply passage and the fuel injection passage are perpendicular to each other and are communicated with each other so that passage axes thereof do not cross each other. Therefore, fuel introduced into the fuel injection passage from the fuel supply passage swirls in the fuel injection passage. As a result, fuel injected into a fuel inlet passage of the sub-tank from the injection hole uniformly disperses over an entire cross-section of the fuel inlet passage, forming a fuel membrane. Therefore, fuel is continuously introduced into the sub-tank in opposition to a water head pressure of fuel in the sub-tank. Thus, fuel is prevented from being discharged from the sub-tank even when fuel in the fuel tank is decreased and does not exist around the jet pump.