Fuel system
AssigneeCaterpillar Inc.
InventorDana Ray Coldren
Life of this patent
Estimating the term…
Abstract
A fuel system for a dual fuel power source includes a first fuel circuit fluidly connected to the power source, a second fuel circuit separate from the first fuel circuit and fluidly connected to the power source, and a pressure regulator fluidly connected to the first fuel circuit. The pressure regulator is configured to vent a first fuel from the first fuel circuit to an aftertreatment system fluidly connected to the power source in response to a pressure difference between the first and second fuel circuits being less than or equal to a pressure difference threshold.
Claims20
A fuel system for a dual fuel power source, comprising:
- a first fuel circuit fluidly connected to the power source;
- a second fuel circuit separate from the first fuel circuit and fluidly connected to the power source;
- and
- a pressure regulator fluidly connected to the first fuel circuit, the pressure regulator configured to vent a first fuel from the first fuel circuit to an aftertreatment system fluidly connected to the power source in response to a pressure difference between the first and second fuel circuits being less than or equal to a pressure difference threshold.
A fuel system for a dual fuel power source, comprising:
- a first fuel circuit configured to supply a first fuel to a pressure regulator fluidly connected to the power source;
- a second fuel circuit separate from the first fuel circuit, the second fuel circuit being configured to supply a second fuel, different than the first fuel, to the pressure regulator;
- and
- an injector fluidly connected to the pressure regulator, the injector being configured to inject the first and second fuels into a combustion chamber of the power source, wherein
- the pressure regulator is fluidly connected to an accumulator and configured to vent the first fuel, in gaseous form, to the accumulator in response to a pressure difference between the first and second fuel circuits being less than or equal to a pressure difference threshold.
A method of operating a fuel system associated with a dual fuel power source, comprising:
- directing a first fuel, in gaseous form, from a first fuel circuit to the power source;
- directing a second fuel, different than the first fuel, from a second fuel circuit to the power source for combustion with the first fuel;
- directing combustion exhaust from the power source through a particulate filter of an aftertreatment system fluidly connected to the power source;
- venting the first fuel from the first fuel circuit to the aftertreatment system in response to a pressure difference between the first and second fuel circuits being less than or equal to a pressure difference threshold;
- and
- combusting the vented first fuel in a regeneration device of the aftertreatment system to actively regenerate the particulate filter.
Dependencies are inferred from the claim text.