Fuel injector nozzle for reduced coking
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsGrzegorz Siuchta, Rakesh Malhotra
Life of this patent
Estimating the term…
Abstract
The present invention modifies the outlet holes of a fuel injector for injecting fuel into a cylinder of an internal combustion engine. In the present invention, the outside opening of the outlet holes are modified in a manner that increases the outside opening, making the outside opening larger than the inside opening and creating an intermediate opening, which is recessed with the needle housing.
Claims20
A fuel injector for injecting fuel into a cylinder of an internal combustion engine, comprising:
- a valve housing having a surrounding wall;
- an injector body that includes a needle valve within the valve housing;
- a feed passage fluidly connecting the valve housing with a source of high pressure fuel;
- and
- at least one hole through the surrounding wall having a first opening size within a thickness of the wall and a second opening size at an outside surface of the wall, where the second opening size is greater than the first opening size.
A housing for a fuel injector for use with an internal combustion engine, comprising:
- a fuel inlet near to one end of the housing and a tip portion extending from an intermediate position on the housing to an opposite end of the housing, wherein a plurality of holes are formed substantially radially through a wall of the housing within the tip portion;
- a feed passage formed in the needle housing, wherein the feed passage fluidly connects the fuel inlet of the needle housing with the holes;
- and
- the holes each have an increased cross-section adjacent an outside surface of the tip portion.
A fuel injector for injecting fuel into a cylinder of an internal combustion engine, for use in an engine operated in an increased coking mode, comprising:
- a valve housing having a surrounding wall;
- an injector body that includes a needle valve within the valve housing;
- a feed passage fluidly connecting the valve housing with a source of high pressure fuel;
- and
- at least one hole through the surrounding wall having a first opening size within a thickness of the wall and a second opening size at an outside surface of the wall, where the second opening size is greater than the first opening size.
Dependencies are inferred from the claim text.