Fuel injectors
OwnerTakaaki Takagi, Kenzo Nagasakainventors
Life of this patent
Estimating the term…
Abstract
A jet opening 13a for injecting fuel can be opened and closed by a ball valve 23 of a movable element 20. An orifice plate 14 is disposed on a downstream side of the jet opening and has between about eight to eighteen circular jet holes formed for further atomizing fuel particles exhausted by the jet opening 13a. Upstream side openings of the jet holes can be dispersed on a plurality of circles. A thickness t of the orifice plate and a diameter φd of the jet holes can be set to be 0.53≦t/φd≦0.82. A shortest distance L between said upstream side openings of the jet holes and a diameter φd of the jet holes can be set to be L>φd.
Claims10
A fuel injector comprising:
- a fuel jet opening,
- a movable element that can intermittently contact said jet opening to open and close the jet opening, and
- an orifice plate disposed on the downstream side of said jet opening and having between about 8 to 18 jet holes, the thickness t of said orifice plate and the diameter φd of said jet holes satisfying a ratio of about 0.53≦t/φd≦0.82.
A fuel injector comprising:
- a fuel jet opening,
- a movable element that can intermittently contact said jet opening to open and close the jet opening, and
- an orifice plate disposed on a downstream side of said jet opening and having a plurality of jet holes formed therein, wherein:
- said movable element has a flat surface of diameter φD formed in a portion of the movable element that can intermittently contact said orifice plate, said jet holes are located within a circle of the diameter φD in the orifice plate that can intermittently contact said flat surface, said jet holes are formed along respective inclined axes that are inclined with respect to the central axis of the orifice plate such that the jet holes are directed downward and away from the central axis of the orifice plate;
- and said inclined axes of the jet holes are defined so as not to interfere with each other.
A fuel injector comprising:
- an orifice plate disposed on a downstream side of a fuel jet opening and having between about 8 to 18 jet holes, the thickness t of said orifice plate and the diameter φd of said jet holes satisfying a ratio of about 0.53≦t/φd≦0.82.
Dependencies are inferred from the claim text.