Gaseous fuel engine system operating strategy including hydrogen fueling amount based on performance target
AssigneeCaterpillar Inc.
InventorsJaswinder Singh, David Todd Montgomery
Life of this patent
Estimating the term…
Abstract
Operating a gaseous fuel engine system includes outputting control commands to a first fuel admission valve and a second fuel admission valve to admit, respectively, a gaseous fuel blend containing a gaseous hydrogen fuel (H2), and additional H2, into a gaseous fuel engine. An amount of the additional H2 is determined by way of the respective control command based on a performance target for an engine parameter varying on the basis of a relative amount of H2 in a combustion charge. Related apparatus and control logic is also disclosed.
Claims20
A method of operating a gaseous fuel internal combustion engine system comprising:
- outputting a first control command to a first fuel admission valve to admit a gaseous fuel blend containing a gaseous hydrogen fuel (H2) from a first gaseous fuel supply into a gaseous fuel engine;
- outputting a second control command to a second fuel admission valve to admit additional H2 from a second gaseous fuel supply into the gaseous fuel engine;
- forming a combustion charge in a cylinder in the engine from the gaseous fuel blend, the additional H2, and air;
- determining, by way of the second control command, an amount of the additional H2 based on a performance target for an engine parameter varying on the basis of a relative amount of H2 in the combustion charge;
- burning the combustion charge in the cylinder;
- and
- compensating, relative to the performance target, for a varied H2 concentration in the gaseous fuel blend by way of the additional H2.
A gaseous fuel engine system comprising:
- a gaseous fuel engine having a cylinder formed therein;
- a conduit structured to convey a gaseous fuel blend containing a gaseous hydrogen fuel (H2) to the cylinder;
- a fuel system including a fuel admission valve, and a fueling control unit structured to:
- output a control command to the fuel admission valve to deliver additional H2 supplementing the H2 in the gaseous fuel blend;
- determine the control command to form within the cylinder a combustion charge of the gaseous fuel blend, the additional H2, and air, having a relative amount of H2 that is based on a performance target of an engine operating parameter that varies on the basis of a relative amount of H2 combusted in the cylinder;
- compensate, relative to the performance target, for a varied H2 concentration in the gaseous fuel blend by way of the additional H2;
- and
- operate the gaseous fuel engine in satisfaction of the performance target.
A fuel control system for a gaseous fuel engine system comprising:
- a computer readable memory storing an engine performance model populated based on an engine operating parameter that varies on the basis of a relative amount of a gaseous hydrogen fuel (H2) combusted in a cylinder in a gaseous fuel engine;
- a fueling control unit coupled to the computer readable memory and structured to:
- output a control command to a fuel admission valve to deliver additional H2 supplementing H2 in a gaseous fuel blend conveyed into the cylinder;
- determine the control command by way of the engine performance model to form within the cylinder a combustion charge of the gaseous fuel blend, the additional H2, and air, having a relative amount of H2 that is based on a performance target of the engine operating parameter;
- adjust the additional H2 amount relative to a prior additional H2 amount by way of the control command;
- and
- operate the engine in satisfaction of the performance target based on the adjusted additional H2 amount.
Dependencies are inferred from the claim text.