Fuel supply apparatus for engine and injector for the same
AssigneeHyundai Motor Company
InventorTaeseong LEE
Life of this patent
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Abstract
A fuel supply apparatus for an engine may include a plurality of common rails that stores fuel under relatively different pressures, and at least an injector that is connected to the common rails to be independently supplied with the fuel and selectively inject the fuel in any one of the connected common rails.
Claims18
A fuel supply apparatus for an engine comprising:
- a plurality of common rails that stores fuel under relatively different pressures;
- and
- at least an injector that is connected to the common rails to be independently supplied with the fuel and selectively inject the fuel in any one of the connected common rails.
An injector comprising:
- a housing;
- a high pressure port formed in the housing and connected with a high pressure common rail, a low pressure port connected to a low pressure common rail, and a spill port returning the fuel to the fuel tank;
- and
- a valve member received in the housing and changing states of closing/communicating the low pressure port from/with an injection nozzle, states of closing/communicating the high pressure port from/with the injection nozzle, and a state of communicating the injection nozzle with the spill port.
The fuel supply apparatus for an engine as defined in claim 18, wherein the injection nozzle is connected to a first space defined between the low pressure actuator and the low pressure spool through a low pressure connection channel formed in the housing, and to a second space defined between the high pressure actuator and the high pressure spool through the high pressure connection channel, and the one-way valve is opened only toward the injection nozzle from the second space.
Dependencies are inferred from the claim text.