Fuel injector
AssigneeHitachi, Ltd.
InventorsMasato Kumagai, Hiroshi Yamada, Satoshi Hashimoto, Nobuaki Kobayashi
Life of this patent
Estimating the term…
Abstract
A fuel injector includes a tube member and a valve element to slide axially in the tube member. The valve element includes a center portion and a plurality of plate portions projecting radially from the center portion, and each including side surfaces extending axially; and a guide section including an outer portion defining a valve seat, and an inner portion which is located on a radial inner side of the outer portion, and which is formed with at least one injection hole. The guide section is arranged to divert the flow of the fuel conveyed along the plate portions, to a radial inward direction toward the injection hole.
Claims18
A fuel injector comprising:
- a tube member including an inside bore for passage of a fuel;
- a valve seat provided in a downstream end portion of the tube member;
- a valve element arranged to slide axially in the tube member to and away from the valve seat;
- a plurality of plate portions provided in the valve element and arranged to slide on an inside circumference surface of the tube member, the plate portions projecting radially with respect to an axis of the tube member, each of the plate portions including a side surface extending along the axis of the tube member;
- a drive section to move the valve element to and away from the valve seat;
- a nozzle member including an injection hole located on an inner side of the valve seat within the tube member and arranged to inject the fuel allowed to pass through a clearance formed between the valve element and the valve seat;
- and
- a guide portion to bend the flow of the fuel allowed to flow along the plate portions, toward the axis of the tube member and thereby to guide the fuel to the injection hole.
A fuel injector comprising:
- a tube member including an inside bore to receive a fuel;
- a valve element arranged to slide axially in the tube member between a valve close position, and a valve open position, the valve element including
- a center portion;
- and
- a plurality of plate portions projecting radially from the center portion, and fitting slidably in the tube member;
- and
- a guide section including
- an outer portion defining a valve seat, and
- an inner portion which is located on a radial inner side of the outer portion, and which is formed with an injection hole to inject the fuel conveyed through an interspace opened between the valve seat and the valve element,
- the guide section being arranged to divert the flow of the fuel conveyed along the plate portions, to a radial inward direction toward the injection hole.
Dependencies are inferred from the claim text.