Pump assembly and method for leak detection of fluid system
First Claim
1. A method of detecting a leak in a vehicle fuel system, the vehicle fuel system including a switch that changes state according to pressure in the vehicle fuel system, the method comprising:
- fluidly coupling a pump assembly to the vehicle fuel system via a fuel filler tube of the vehicle, the pump assembly including a predetermined leak that is in fluid communication with the vehicle fuel system and which causes the switch to change state after a predetermined time period;
changing pressure in the vehicle fuel system with the pump assembly; and
detecting a leak in the vehicle fuel system if the switch changes state within an amount of time less than the predetermined time period.
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Accused Products
Abstract
A method of detecting a leak in a fluid system, which includes a switch that changes state according to pressure in the fluid system. The method includes changing pressure in the fluid system with a pump assembly. The pump assembly includes a predetermined leak that is in fluid communication with the fluid system and that causes the switch to change state after a predetermined time period. The method also includes detecting a leak in the fluid system if the switch changes state within an amount of time less than the predetermined time period.
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Citations
6 Claims
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1. A method of detecting a leak in a vehicle fuel system, the vehicle fuel system including a switch that changes state according to pressure in the vehicle fuel system, the method comprising:
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fluidly coupling a pump assembly to the vehicle fuel system via a fuel filler tube of the vehicle, the pump assembly including a predetermined leak that is in fluid communication with the vehicle fuel system and which causes the switch to change state after a predetermined time period; changing pressure in the vehicle fuel system with the pump assembly; and detecting a leak in the vehicle fuel system if the switch changes state within an amount of time less than the predetermined time period.
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2. A pump assembly for leak detection of a fuel system of a vehicle, the fuel system including a switch that changes state according to pressure in the fuel system, the pump assembly comprising:
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a pump for changing pressure in the fuel system; a pipe for fluidly coupling the pump to the fuel system; a coupling member for coupling to the vehicle such that the pipe is in fluid communication with the fuel system; wherein the pipe includes a predetermined leak that is in fluid communication with the fluid system and that causes the switch to change state after a predetermined time period. - View Dependent Claims (3, 4, 5, 6)
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Specification