Pressure control valve for a fuel system
AssigneeCaterpillar Inc.
InventorsAlan R Stockner, Amy M Hess, Daniel R Ibrahim
Life of this patent
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Abstract
A valve has a housing defining an interior of the valve. The valve has a first passage in the housing and a second passage in the housing. The valve has a flow limiter movable between a first position at which the first passage is in fluid communication with the second passage and a second position at which the first passage is not in fluid communication with the second passage. The valve has a flow restriction device movable between a first position at which a first flow rate is permitted into the interior of the valve and a second position at which a second flow rate is permitted out of the interior of the valve. The first flow rate is greater than the second flow rate.
Claims22
A fuel system, comprising:
- a fuel source;
- a fuel injector;
- and
- a valve having:
- a first passage in fluid communication with said fuel source,
- a second passage in fluid communication with said fuel injector,
- a flow limiter movable between a first position at which said first passage is in fluid communication with said second passage and a second position at which said first passage is not in fluid communication with said second passage,
- and a flow restriction device movable between a first position at which a first flow rate is permitted from said fuel source into said valve and a second position at which a second flow rate is permitted from said valve to said fuel source, said first flow rate being greater than said second flow rate, said flow limiter being movable to said second position when said first flow rate is permitted from said fuel source into said valve.
A valve for use in a fuel system, said valve comprising:
- a housing defining an interior of said valve;
- a first passage in said housing, said passage configured to permit a flow of a fuel into said interior;
- a second passage in said housing, said passage configured to permit a flow of said fuel from said interior;
- a flow limiter movable between a first position at which said first passage is in fluid communication with said second passage and a second position at which said first passage is not in fluid communication with said second passage;
- and
- a flow restriction device movable between a first position at which a first flow rate of fuel is permitted into said interior and a second position at which a second flow rate of fuel is permitted out of said interior, said first flow rate being greater than said second flow rate, the fuel permitted into said interior at said first flow rate being capable of affecting movement of said flow limiter toward said second position.
A fuel system, comprising:
- a fuel source;
- a fuel injector;
- and
- a valve having:
- a first passage in fluid communication with said fuel source,
- a second passage in fluid communication with said fuel injector,
- a flow limiter movable between a first position at which said first passage is in fluid communication with said second passage and a second position at which said first passage is not in fluid communication with said second passage,
- means for permitting a flow of a fuel at a first flow rate from said fuel source to said flow limiter, and
- means for restricting to a second flow rate a flow of said fuel from said flow limiter to said fuel source, said first flow rate being greater than said second flow rate.
Dependencies are inferred from the claim text.