Mixed-mode fuel injector with a variable orifice
AssigneeQuantLogic Corporation
InventorDeyang Hou
Life of this patent
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Abstract
This invention disclosed a mixed-mode fuel injector with a micro-variable-circular-orifice (MVCO), which is a fuel injection device for internal combustion engines, either diesel or gasoline engines. The fuel injector has means of generating variable mixed-mode sprays of conical and multi-jet shapes.
Claims20
A mixed-mode fuel injector comprising:
- (i) a nozzle body (5) including a tip (7), comprising passages for fuel (FP) which includes an inner cylindrical space for receiving a needle valve (1), and an inner conical surface (C) at the tip (7) of the nozzle body, the conical surface (C) guiding a spray of fuel;
- (ii) a needle valve (1), which has a converging-diverging conical head wherein the head diverges at its upstream end and converges at its downstream most end for guiding a spray of fuel, the needle valve including a conical seal surface (2) upstream of the head;
- wherein the needle valve being movable between open and closed positions by a driving means within the nozzle body, wherein the needle valve is at a biased closed position with its seal surface (2) being pressed against nozzle body (5) to block fuel flow, or in an opening position the needle valve seal surface being lifted away from nozzle body to permit fuel flow;
- and
- (iii) a micro-variable-circular-orifice comprising a variable annular ring aperture (4) between the needle valve and the nozzle body for producing a hollow conical spray, and multiple conventional multijet-orifices (6) distributed underneath the conical surface (C) as closed channels each for producing one conventional jet spray, such that fuel is dischargeable in variable sprays of hollow conical and multiple jets through said micro-variable-circular-orifice and multijet-orifices by lifting said needle valve to different positions, with hollow conical spray pattern being produced first followed by multiple jet spray patterns.
A mixed-mode fuel injector comprising:
- (i) a nozzle body (5) including a tip, comprising a passage for fuel (FP) which includes an inner cylindrical space for receiving a needle valve (1), and an inner conical surface (C) at the tip (7) of the nozzle body, the conical surface guiding a spray of fuel;
- (ii) the needle valve (1) having a converging-diverging conical head wherein the head diverges at its upstream end and converges at its downstream most end for guiding a spray of fuel, the needle valve including a conical seal surface upstream of the head;
- wherein the needle valve being moveable between open and closed positions by a driving means within the nozzle body, wherein in the closed position the sealing surface of the needle valve is pressed against nozzle body (5) to block fuel flow, and in the open position the needle valve seal surface being lifted away from nozzle body to permit fuel flow, and
- (iii) a micro-variable-circular-orifice comprising a variable annular ring aperture (4) between the needle valve and the nozzle body for producing a hollow conical spray, and multiple multijet-orifice (6) distributed on the conical surface (C) as open channels each for producing a jet spray, such that fuel is discharged in variable spray patterns of hollow conical and multiple jets through the micro-variable-circular-orifice by lifting the needle valve to different positions.
A mixed-mode fuel injector according to any of the preceding claims, wherein the fuel injected is one or more of diesel fuels, gasoline fuels, alternative fuels, mixtures of water and fuels, pure water or liquid exhaust cleaning additives wherein the fuel injector is a general purpose injector.
Dependencies are inferred from the claim text.