초록 ▼

The invention relates to a plastic fuel tank (1) for motor vehicles having at least one tank wall (2) surrounding at least one fuel volume, wherein the tank wall (2) is provided at least in a certain area or certain areas with means for increasing flexural rigidity in the form of two-dimensionally e

The invention relates to a plastic fuel tank (1) for motor vehicles having at least one tank wall (2) surrounding at least one fuel volume, wherein the tank wall (2) is provided at least in a certain area or certain areas with means for increasing flexural rigidity in the form of two-dimensionally extended reinforcing layers (3) connected materially and/or positively thereto (FIG. 1).

대표청구항 ▼

1. A plastic fuel tank having a volume for containing fuel for a motor vehicle comprising: a tank wall arranged to provide a pressure vessel which is hermetically sealed at a given differential pressure relative to ambient pressure, wherein the tank wall is reinforced only in a certain area or certa

1. A plastic fuel tank having a volume for containing fuel for a motor vehicle comprising: a tank wall arranged to provide a pressure vessel which is hermetically sealed at a given differential pressure relative to ambient pressure, wherein the tank wall is reinforced only in a certain area or certain areas such that only a portion of the tank wall is reinforced without substantially impairing said volume, wherein the tank wall is reinforced with means to increase flexural rigidity in a form of at least one two-dimensionally extended reinforcing layer connected materially and/or positively to the tank wall; andwherein the reinforcing layer is connected to the tank wall via a thermoplastic intermediate layer and forms an interspace between said reinforcing layer and said tank wall and comprising a corrugated sheet structure of V-shaped profiles made of thermoplastic and having a plurality of peaks, wherein the peaks are welded and/or adhesively bonded to the tank wall and to the reinforcing layer and wherein fuel can flow through said interspace; andwherein the reinforcing layer and intermediate layer provide a directional increase in flexural rigidity of the tank wall such that flexural rigidity of the tank wall is increased in a first direction relative to a second direction through selective alignment of the intermediate layer at selected locations of said tank wall; andwherein the tank wall is formed by half-shells; andwherein the half-shells comprise half-shell walls joined directly to one another to form the tank wall without the reinforcing layer or intermediate layer disposed between the joined half-shell walls. 2. The plastic fuel tank according to claim 1, wherein the reinforcing layer comprises one or more sheets and/or strips of thermoplastic which extend approximately parallel to the tank wall being reinforced. 3. The plastic fuel tank according to claim 1, wherein the reinforcing layer is connected to the tank wall being reinforced at a distance from the tank wall by the intermediate layer. 4. The plastic fuel tank according to claim 1, wherein the reinforcing layer is provided on the inside of the tank wall. 5. The plastic fuel tank according to claim 1, wherein the intermediate layer is less flexurally rigid than the tank wall and the reinforcing layer. 6. The plastic fuel tank according to claim 1, wherein the directional increase in flexural rigidity is achieved through alignment of the corrugated structure on the tank wall.