US 6,981,490 B2
Fuel feed apparatus having sub tank and jet pump
Kiyoshi Nagata, Nagoya (Japan); and Masaaki Konishi, Chiryu (Japan)
Assigned to Denso Corporation, (Japan)
Filed on Mar. 05, 2004, as Appl. No. 10/793,039.
Claims priority of application No. 2003-068320 (JP), filed on Mar. 13, 2003; application No. 2003-090908 (JP), filed on Mar. 28, 2003; and application No. 2003-112660 (JP), filed on Apr. 17, 2003.
Prior Publication US 2004/0177886 A1, Sep. 16, 2004
Int. Cl. F02M 37/00 (2006.01)
U.S. Cl. 123—514 7 Claims
OG exemplary drawing
 
1. A fuel feed apparatus received in a first-tank section included in a fuel tank having a plurality of tank sections, the fuel feed apparatus supplying fuel received in the fuel tank to outside of the fuel tank and comprising:
a sub-tank received in the first-tank section;
a fuel pump received in the sub-tank for drawing fuel received in the sub-tank and pressurizing the fuel;
a first jet pump arranged in the first-tank section for generating suction power by jetting fuel for supplying fuel received in the first-tank section into the sub-tank; and
a second jet pump for generating suction power by jetting fuel for supplying fuel received in a second-tank section included in the fuel tank into the first-tank section,
wherein:
the fuel pump includes a rotating member that rotates for drawing and pressurizing fuel;
the rotating member has a pressurizing passage formed along with an outer periphery of the rotating member;
fuel intermediately pressurized in the fuel pump is supplied to each of the first jet pump and the second jet pump;
the intermediately pressurized fuel is supplied from a vent hole, which is located in a midstream of the pressurizing passage to the fuel pump, to the first jet pump and to the second jet pump through respective paths from the vent hole thereto, including a passage which is common to the first jet pump and second jet pump.