US 6,786,085 B1 · Fuel supply system for a motor vehicle

Abstract

To prevent the dirt present in the fuel from depositing on the filter material so that the resistance to the flow through the filter material rises continuously overtime, a fuel system for a vehicle is provided in such a way that the throughflow resistance of the fuel filter remain almost constant. This is achieved as a result of the formation of a deposition tank in a housing of the fuel filter under the filter material located in a housing, in which the dirt from the fuel is deposited and as a result of a pressure accumulator in the fuel system causes the fuel stored in pressure accumulator to rinse the fuel filter after the engine has been switched off.

Claims13

Dependent claims

Fuel system for a motor vehicle with a fuel container from which a fuel pump transports fuel via fuel pipelines from a system input location in the fuel container via a fuel filter towards an engine,

wherein a deposition tank is formed into a housing of the fuel filter under a filter material, which is provided in the housing, into which said tank dirt filtered out of the fuel is deposited,
wherein a pressure accumulator is installed in the fuel system which accumulates and stores fuel when the engine is running and after the engine is switched off, the fuel stored in the pressure accumulator rinses the fuel filter to thereby operatively deposit said dirt into said tank, and
wherein a delay valve is installed upstream of the pressure accumulator, so that after starting of the engine the pressure accumulator is filled with the fuel subject to a time delay.

Dependencies are inferred from the claim text.

Fuel supply system for a motor vehicle

Life of this patent

Fuel supply system for a motor vehicle

Life of this patent

Abstract

Claims13