Fuel control valve
AssigneeKyosan Denki Co., Ltd.
InventorMasakazu Suzuki
Life of this patent
Estimating the term…
Abstract
A fuel control valve includes a case and a movable body that is movably housed in the case. The case has a valve seat surface shaped in an inner cone shape whose inner diameter increases toward a tip. A valve element surface is operable by the movable body, and is in contact with the valve seat surface along a seal line in a valve closed state. The valve element surface is separated from the valve seat surface in a valve open state. Plural grooves are disposed between the tip and the seal line to expand radially outside from the valve seat surface. Plural projections are defined between the grooves to intermittently leave the valve seat surface.
Claims12
A fuel control valve comprising:
- a case that provides a passage extending from a tank for storing fuel;
- a movable body movably housed in the case to open or close the passage;
- a valve seat surface defined in the case to have an inner cone shape whose inner diameter increases toward a tip;
- a valve element surface that is operable by the movable body, the valve element surface being in contact with the valve seat surface along a seal line in a valve closed state, the valve element surface being separated from the valve seat surface in a valve open state;
- a plurality of grooves disposed between the tip and the seal line to expand radially outside from the valve seat surface;
- and
- a plurality of projections that are defined between the grooves to intermittently leave the valve seat surface, wherein
- the movable body includes a needle part extending toward the valve seat surface,
- the valve element surface is defined at a tip part of the needle part, and
- the valve seat surface left on the plurality of projections guides the valve element surface at the tip part of the needle part.
A fuel control valve comprising:
- a case that provides a passage extending from a tank for storing fuel;
- a movable body movably housed in the case to open or close the passage;
- a valve seat surface defined in the case to have an inner cone shape whose inner diameter increases toward a tip;
- a valve element surface that is operable by the movable body, the valve element surface being in contact with the valve seat surface along a seal line in a valve closed state, the valve element surface being separated from the valve seat surface in a valve open state;
- a plurality of grooves disposed between the tip and the seal line to expand radially outside from the valve seat surface;
- and
- a plurality of projections that are defined between the grooves to intermittently leave the valve seat surface, wherein
- the case includes:
- a partition wall that partitions the passage;
- and
- a tubular part extending from the partition wall,
- the valve seat surface is an inner side face of the tubular part, and
- the plurality of grooves radially extend on the tubular part, and are open on an outer side face of the tubular part and the valve seat surface.
A fuel control valve comprising:
- a case that provides a passage extending from a tank for storing fuel;
- a movable body movably housed in the case to open or close the passage;
- a valve seat surface defined in the case to have an inner cone shape whose inner diameter increases toward a tip;
- a valve element surface that is operable by the movable body, the valve element surface being in contact with the valve seat surface along a seal line in a valve closed state, the valve element surface being separated from the valve seat surface in a valve open state;
- a plurality of grooves disposed between the tip and the seal line to expand radially outside from the valve seat surface;
- a plurality of projections that are defined between the grooves to intermittently leave the valve seat surface;
- and
- a plurality of barrier walls disposed between the case and the movable body to surround the passage, the plurality of barrier walls being plate-like members extending between the case and the movable body.
Dependencies are inferred from the claim text.