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US 12,416,280 B2Granted
High-pressure fuel injection system
AssigneeRK IP Holdings, LLC
InventorRon Kukler
Life of this patent
Estimating the term…
Abstract
A fuel injector is provided. The fuel injector is operable to inject fuel at extremely high pressures which creates very small droplet sizes, allowing for efficient self-ignition of the fuel and allows for clean, efficient combustion due to the small droplet sizes. The fuel injector uses pressure from within a combustion chamber to actuate the spraying of fuel from the injector, thereby solving many problems experienced by typical fuel injectors and eliminating many problem-components of prior art fuel injectors.
Claims26
A fuel injector comprising:
- a body formed of a housing at a rear portion of the body and a barrel at a front of the body;
- a low-pressure piston at the front of the body and engaged with the barrel, the low pressure piston movable relative to the barrel;
- a high-pressure piston engaged with the barrel, the high-pressure piston configured to allow fluid to flow through it;
- an injection nozzle assembly, the injection nozzle assembly in fluid communication with the high-pressure piston;
- wherein a movement of the low-pressure piston causes fluid within the barrel to flow into the high-pressure piston and to the nozzle assembly;
- and
- a fuel inlet providing fluid flow to the low-pressure piston and to the high-pressure piston.
4 more elements
A method of fuel injection comprising the steps of:
- compressing a gas within a combustion chamber of a combustion engine by conveying a piston toward an end wall of the combustion chamber;
- depressing a low-pressure piston of a fuel injector by an increase in pressure applying a force to the low-pressure piston and causing it to move;
- loading a high-pressure chamber of the fuel injector with high pressure fuel by the movement of the low-pressure piston;
- overcoming a spring-loaded valve by the pressure within the high-pressure chamber;
- spraying fuel from the high-pressure chamber out of a nozzle of the fuel injector after the overcoming of the spring-loaded valve;
- and
- igniting the sprayed fuel within the combustion chamber.
4 more elements
A fuel injector comprising:
- a body formed of a housing at a rear portion of the body and a barrel at a front of the body;
- a low-pressure piston at the front of the body and engaged with the barrel, the low pressure piston movable relative to the barrel;
- a high-pressure piston, the high-pressure piston configured to allow fluid to flow through it;
- wherein the high-pressure piston has a fluid inlet, and wherein a front face surface area of the low-pressure piston is greater than a surface area of a face of the high-pressure piston that defines a fluid inlet opening
- an injection nozzle assembly, the injection nozzle assembly in fluid communication with the high-pressure piston;
- and
- a fuel inlet.
4 more elements
A fuel injector comprising:
- a body formed of a housing at a rear portion of the body and a barrel at a front of the body;
- a low-pressure piston at the front of the body and engaged with the barrel, the low pressure piston movable relative to the barrel;
- a high-pressure piston, the high-pressure piston configured to allow fluid to flow through it;
- an injection nozzle assembly, the injection nozzle assembly in fluid communication with the high-pressure piston;
- a high-pressure barrel positioned within the barrel, the high-pressure barrel interfacing with the high-pressure piston and directing fluid flow from within the barrel to the high-pressure piston and into the nozzle assembly;
- and
- a fuel inlet.
4 more elements
A fuel injector comprising:
- a body formed of a housing at a rear portion of the body and a barrel at a front of the body;
- a low-pressure piston at the front of the body and engaged with the barrel, the low pressure piston movable relative to the barrel;
- a high-pressure piston, the high-pressure piston configured to allow fluid to flow through it;
- an injection nozzle assembly, the injection nozzle assembly in fluid communication with the high-pressure piston;
- wherein the high-pressure piston further comprises a valve positioned between a fluid inlet opening and an outlet in communication with the nozzle assembly, the valve operable to allow fluid flow when a pressure differential between the fluid inlet opening and a nozzle aperture exceeds a predetermined amount;
- and
- a fuel inlet.
4 more elements
A fuel injector comprising:
- a body formed of a housing at a rear portion of the body and a barrel at a front of the body;
- a low-pressure piston at the front of the body and engaged with the barrel, the low pressure piston movable relative to the barrel;
- a high-pressure piston engaged with the barrel, the high-pressure piston configured to allow fluid to flow through it;
- an injection nozzle assembly, the injection nozzle assembly in fluid communication with the high-pressure piston;
- a fuel inlet;
- and
- a solenoid valve that is configured to control fluid flow into the fuel inlet.
4 more elements
Dependencies are inferred from the claim text.