Dual fuel system having a damper
AssigneeCaterpillar Inc.
InventorsJoshua W. STEFFEN, Dana R. Coldren
Life of this patent
Estimating the term…
Abstract
A dual fuel system for an engine is disclosed. The dual fuel system may have a first fuel supply providing a first fuel to the engine, and a second fuel supply providing a second fuel. The dual fuel system may also have a regulator configured to pass the second fuel from the second fuel supply to the engine, with the regulator also in fluid communication with the first fuel supply. The dual fuel system may further have a damper in fluid communication with the first fuel supply and an output of the regulator.
Claims20
A dual fuel system for an engine, comprising:
- a first fuel supply providing a first fuel to the engine;
- a second fuel supply providing a second fuel;
- a regulator configured to pass the second fuel from the second fuel supply to the engine, the regulator also in fluid communication with the first fuel supply;
- and
- a damper in fluid communication with the first fuel supply and an output of the regulator.
A method for providing two fuels to an engine, comprising:
- directing a portion of a first fuel into the engine;
- directing a second portion of the first fuel to a regulator and to a damper in parallel;
- directing a first portion of a second fuel through the regulator into the engine;
- and
- directing a second portion of the second fuel from the regulator to the damper in parallel.
A dual fuel system for an engine comprising:
- a first supply of diesel fuel;
- a second supply of natural gas;
- a regulator configured to pass natural gas from the second supply to the engine, the regulator also in fluid communication with the first supply;
- at least one fuel injector configured to inject the diesel fuel and the natural gas into the engine;
- and
- a damper in fluid communication with the first fuel supply and an output of the regulator, the damper including:
- a first piston having a first end in contact with the diesel fuel;
- a second piston having a second end in contact with the natural gas;
- a seal disposed around the second piston;
- a rod connecting the first and second pistons;
- and
- a drainage port located between the first and second pistons and connected back to the first supply, wherein the first and second ends are sized to allow a pressure of the diesel fuel to be about 5 MPa higher than a pressure of the natural gas.
Dependencies are inferred from the claim text.