Method for control of advanced combustion through split direct injection of high heat of vaporization fuel or water fuel mixtures
AssigneeThe Research Foundation for The State University of New York
InventorsBenjamin Lawler, Mozhgan Rahimi Boldaji, Brian Gainey
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Abstract
The disclosure relates to a method for controlling compression ignition combustion phasing in an internal combustion engine, the method comprising providing a high heat of vaporization fuel charge, the high heat of vaporization fuel charge having a latent heat of vaporization; and directly injecting a spray of the fuel charge into a cylinder of an internal combustion engine during the intake stroke, the internal combustion engine having a gas exchange stage and a combustion stage, the injecting from a single injector and occurring at least immediately after Top Dead Center during the gas exchange stage.
Claims28
A method for controlling compression ignition combustion phasing in an internal combustion engine comprising:
- providing a high heat of vaporization fuel charge, the fuel charge having a latent heat of vaporization of between about 600 to about 1800 kJ/kg;
- and
- directly injecting a spray of the high heat of vaporization fuel charge into a cylinder of an internal combustion engine during the intake stroke, the internal combustion engine having a gas exchange stage and a combustion stage, the injecting from a single injector and occurring at least immediately after Top Dead Center (TDC) during the gas exchange stage.
A method for operating a compression ignition internal combustion engine comprising:
- directly injecting a first portion of a high heat of vaporization fuel charge into a cylinder of an internal combustion engine during the intake stroke, the internal combustion engine having a gas exchange stage and a combustion stage, the injecting from a single injector and occurring at least immediately after Top Dead Center (TDC) during the gas exchange stage;
- and
- directly injecting a second portion of the high heat of vaporization fuel charge into the cylinder during the compression stroke, the fuel charge having a latent heat of vaporization of between about 600 to about 1800 kJ/kg.
A method of compression ignition in an internal combustion engine comprising:
- providing a high heat of vaporization fuel charge, the fuel charge having a latent heat of vaporization of between about 600 to about 1800 kJ/kg;
- and
- directly injecting a spray of the high heat of vaporization fuel charge from a single injector into a cylinder of an internal combustion engine during the intake stroke, the internal combustion engine having a gas exchange stage and a combustion stage, the injecting comprising multiple injections wherein a fraction of each injection evaporates in the air of the cylinder, the injections occurring between about −350 degrees after Top Dead Center (TDC) during combustion stage to about −180 degrees after TDC during the combustion stage, wherein the fraction that evaporates in the air of the cylinder is between about 20% to about 95%.
A method of controlling the rate of combustion in an advanced compression ignition combustion process of an internal combustion engine comprising:
- providing a high heat of vaporization fuel charge, the fuel charge having a latent heat of vaporization of between about 600 to about 1800 kJ/kg;
- and
- directly injecting a spray of the high heat of vaporization fuel charge into a cylinder of an internal combustion engine during the compression stroke, the internal combustion engine having a gas exchange stage and a combustion stage, the injecting from a single injector and occurring between about −140 degrees after Top Dead Center (TDC) during combustion stage to about −30 degrees after TDC during the combustion stage.
Dependencies are inferred from the claim text.