Fuel accumulator and pressure limiting device

Details Fuel accumulator and pressure limiting device Fuel accumulator and pressure limiting device

1998-03-24

1998-12-01

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

123509, 123447, 13711527, F02M 3900, F16K 1704

Patent

active

058424555

ABSTRACT:
An accumulator and over-pressure relief valve unit disposed within a vehicle fuel tank to accommodate expansion of fuel due to heating of the fuel within the fuel system and to maintain increased pressure of heated fuel in the fuel system to prevent vapor formation and to provide an over-pressure relief to bleed fuel back into the fuel tank when the unit has reached its maximum fuel accumulating capacity. The accumulator has a plastic cap press fit onto a plastic body with a diaphragm received therebetween and defining an expansion chamber with the body. To provide a seal between the cap and body, they are preferably ultrasonically welded together. The diaphragm has a normally closed valve which, when opened, communicates the accumulator chamber with the fuel tank. This valve opens in response to any over-pressure that may develop after the accumulator has reached its maximum accumulating capacity to bypass fuel into the fuel tank and thereby limit the maximum pressure of the fuel in the fuel system.

REFERENCES:
patent: 4458712 (1984-07-01), Stevenson
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patent: 5078167 (1992-01-01), Brandt
patent: 5402817 (1995-04-01), Bueser
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patent: 5590631 (1997-01-01), Tuckey
patent: 5655504 (1997-08-01), Iwai
patent: 5706785 (1998-01-01), Radermacher
patent: 5720263 (1998-02-01), Frank
patent: 5727529 (1998-03-01), Tuckey
patent: 5762047 (1998-06-01), Yoshioka

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