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US 6,966,307 B2Granted
Fuel drain structure in fuel line
AssigneeHyundai Motor Company
InventorChang-Hyun Shin
Life of this patent
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Abstract
A fuel drain structure in a fuel line comprising a bypass channel for connecting a fuel influx side and a fuel efflux side of a regulator, and a rotary valve for opening and closing the bypass channel, contributing to a prevention of fuel remaining in the fuel line from entering the engine when the engine stops running, and minimization of pollution occurring when the engine is re-started.
Claims1
A fuel drain structure in a fuel line comprising:
- a regulator adjusting pressure of fuel pumped out from a fuel pump to a fuel line, including:
- a housing forming a chamber by coupling with a valve seat, a fuel inlet formed at one side of said chamber, a fuel outlet formed at said valve seat, a valve resiliently supported via a spring at an upper side of said valve seat;
- a bypass channel directly connecting said fuel inlet and said fuel outlet of said regulator, such that the residual fuel inside said fuel line is forced to flow into a fuel tank through said bypass channel while the engine stops running, wherein said bypass channel is in a funnel shape;
- and
- a rotary valve having a sectoral-spool shape is further disposed at an inlet side of said bypass channel, wherein said rotary valve is activated by an actuator operated in response to an electronic control unit (ECU).
2 more elements
Dependencies are inferred from the claim text.