Apparatus and method for operating an internal combustion engine with multiple combustion modes
AssigneeHPDI Technology Limited Partnership
InventorsJian Huang, Sandeep Munshi
Life of this patent
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Abstract
An apparatus and method for operating an engine in multiple combustion modes includes storing a gaseous fuel as a compressed gas; the engine is operated in a first combustion mode when an injection or storage pressure of the gaseous fuel is greater than or equal to a threshold pressure, the engine is operated in a second combustion mode when the injection or storage pressure is less than the threshold pressure; in the first combustion mode, the gaseous fuel substantially burns by diffusion combustion; and in the second combustion mode, the gaseous fuel substantially burns by one of partially-premixed combustion and premixed combustion.
Claims27
An apparatus for operating an internal combustion engine in multiple combustion modes comprising
- a gaseous-fuel supply storing gaseous fuel as a compressed gas having a gas storage pressure;
- a fuel injector in fluid communication with the gaseous-fuel supply and configured to inject gaseous fuel directly into a combustion chamber of the internal combustion engine at an injection pressure;
- and
- a controller operatively connected with the fuel injector and programmed to
- determine to operate the internal combustion engine in a first combustion mode or a second combustion mode,
- the internal combustion engine is operated in the first combustion mode when the injection pressure or the gas storage pressure is greater than or equal to a first-combustion-mode threshold pressure,
- the internal combustion engine is operated in the second combustion mode when the injection pressure or the gas storage pressure is less than the first-combustion-mode threshold pressure;
- in the first combustion mode, actuate the fuel injector to inject the gaseous fuel at a first injection timing during a compression stroke such that the gaseous fuel substantially burns by diffusion combustion;
- and
- in the second combustion mode, actuate the fuel injector to inject the gaseous fuel at a second injection timing during the compression stroke such that the gaseous fuel substantially burns by one of partially-premixed combustion and premixed combustion.
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A method for operating an internal combustion engine in multiple combustion modes comprising
- storing a gaseous fuel as a compressed gas having a gas storage pressure;
- selectively injecting the gaseous fuel into a combustion chamber of the internal combustion engine;
- determining to operate the internal combustion engine in a first combustion mode or a second combustion mode,
- the internal combustion engine is operated in the first combustion mode when an injection pressure of the gaseous fuel or the gas storage pressure is greater than or equal to a first-combustion-mode threshold pressure,
- the internal combustion engine is operated in the second combustion mode when the injection pressure or the gas storage pressure is less than the first-combustion-mode threshold pressure;
- in the first combustion mode, injecting the gaseous fuel at a first injection timing during a compression stroke such that the gaseous fuel substantially burns by diffusion combustion;
- and
- in the second combustion mode, injecting the gaseous fuel at a second injection timing during the compression stroke such that the gaseous fuel substantially burns by one of partially-premixed combustion and premixed combustion.
Dependencies are inferred from the claim text.