Fuel management for dynamic gas blending disablement
AssigneeCaterpillar Inc.
InventorManuj Nagesh Dindgur
Life of this patent
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Abstract
A system and method for adjusting primary fuel, when blending of primary fuel and secondary fuel is disabled, is provided. The method includes disabling, at a blend disabling angle, blending of primary fuel and secondary fuel for the DGB; determining whether the secondary fuel has been injected for a current cycle for a cylinder prior to the blend disabling angle; in response to determining that the secondary fuel has been injected for the current cycle prior to the blend disabling angle, injecting a pilot shot of the primary fuel for the current cycle; and in response to determining that the secondary fuel has not been injected for the current cycle prior to the blend disabling angle, injecting a full shot of the primary fuel for the current cycle.
Claims17
A method in a dynamic gas blending (DGB) system comprising:
- generating a command, at a blend disabling angle, to disable blending of a primary fuel and a secondary fuel for the DGB system;
- determining whether the secondary fuel has been injected for a current cycle for a cylinder prior to the blend disabling angle;
- and
- in response to determining that the secondary fuel has been injected for the current cycle prior to the blend disabling angle, injecting a pilot shot of the primary fuel for the current cycle;
- and
- wherein disabling the blending of the primary fuel and the secondary fuel includes disabling injection of the secondary fuel.
A dynamic gas blending (DGB) system comprising:
- an electronic control module (ECM);
- a primary fuel delivery system coupled to the ECM and a cylinder, the primary fuel delivery system configured to deliver primary fuel;
- and
- a secondary fuel delivery system coupled to the ECM and the cylinder, the secondary fuel delivery system configured to secondary primary fuel,
- wherein the ECM comprises:
- a processor;
- and
- a memory communicatively coupled to the processor, the memory storing thereon processor-executable instructions that, when executed by the processor, cause the processor to:
- disable, at a blend disabling angle, blending of the primary fuel and the secondary fuel for the DGB, including disabling injection of the secondary fuel to disable the blending of the primary fuel and the secondary fuel;
- determine whether the secondary fuel has been injected for a current cycle for the cylinder prior to the blend disabling angle;
- and
- inject a pilot shot of the primary fuel for the current cycle in response to determining that the secondary fuel has been injected for the current cycle prior to the blend disabling angle.
Non-transitory computer-readable medium storing thereon processor-executable instructions that, when executed by a processor of a dynamic gas blending (DGB) system, cause the processor to perform operations, the operations comprising:
- disabling, at a blend disabling angle, blending of primary fuel and secondary fuel for the DGB system;
- determining whether the secondary fuel has been injected for a current cycle for a cylinder prior to the blend disabling angle;
- in response to determining that the secondary fuel has been injected for the current cycle prior to the blend disabling angle, injecting a pilot shot of the primary fuel for the current cycle;
- and
- in response to determining that the secondary fuel has not been injected for the current cycle prior to the blend disabling angle, injecting a full shot of the primary fuel for the current cycle;
- and
- wherein disabling the blending of the primary fuel and the secondary fuel includes disabling injection of the secondary fuel.
Dependencies are inferred from the claim text.