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In a fuel tank system, a strainer chamber with a suction bore opened into its upper surface is provided in a collecting recess for collecting a residual fuel containing impure foreign substances such as dust and water, the collecting recess being provided in a bottom wall of a fuel tank. A fuel disc

In a fuel tank system, a strainer chamber with a suction bore opened into its upper surface is provided in a collecting recess for collecting a residual fuel containing impure foreign substances such as dust and water, the collecting recess being provided in a bottom wall of a fuel tank. A fuel discharge pipe is connected to the strainer chamber. Fuel flow passages are provided outside the strainer chamber. Baffle plates are provided in front and in the rear of and outside the strainer chamber to guide the fuel flowing into the collecting recess during tilting of the fuel tank into the fuel flow passages. Thus, the impure foreign substances are prevented from entering the strainer chamber.

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What is claimed is: 1. A fuel tank system in which a downward-depressed collecting recess for collecting a residual fuel containing impure foreign substances is formed in a portion of a bottom wall of a fuel tank; a strainer chamber is provided in the collecting recess, the strainer chamber include

What is claimed is: 1. A fuel tank system in which a downward-depressed collecting recess for collecting a residual fuel containing impure foreign substances is formed in a portion of a bottom wall of a fuel tank; a strainer chamber is provided in the collecting recess, the strainer chamber includes a wall integral with and extending upward away from the bottom wall of the fuel tank, and an upper surface of the strainer chamber, which is defined by a strainer plate having at least one suction bore defined therein; and a fuel discharge pipe for discharging a fuel within the strainer chamber is connected to a bottom of the strainer chamber, wherein fuel flow passages permitting free flowing of the fuel therethrough are provided in the collecting recess on left and right sides of and outside the strainer chamber, and wherein baffle plates are provided in front and in the rear of and outside the strainer chamber to guide the fuel flowing into the collecting recess during tilting of the fuel tank into the fuel flow passages. 2. The fuel tank system according to claim 1, wherein the strainer chamber is box-shaped and is provided in a center of the collecting recess. 3. The fuel tank system according to claim 1, wherein the wall has an upper surface, and the strainer plate is stainless steel and welded to the upper surface of the wall. 4. The fuel tank system according to claim 1, further comprising a plurality of ribs integrally formed on an inner surface of the wall. 5. The fuel tank system according to claim 4, wherein the ribs extend from the bottom wall of the fuel tank. 6. The fuel tank system according to claim 1, wherein the baffle plates are substantially perpendicular relative to a flow direction in which the fuel flows through the fuel flow passages. 7. The fuel tank system according to claim 1, wherein the baffle plates are integral with and extend away from the bottom wall of the fuel tank.