System and method for operating a turbo-charged engine
First Claim
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1. A method, comprising:
- injecting a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, wherein injecting the first quantity of fuel comprises injecting a pilot fuel quantity of about 1 to 5 percent of a fuel quantity; and
injecting a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke, wherein injecting the second quantity of fuel comprises injecting a majority fuel quantity of about 95 to 99 percent of the fuel quantity.
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Abstract
In certain embodiments, there is provided a method of operating a turbocharged system including injecting a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke. The method further includes injecting a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke.
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Citations
35 Claims
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1. A method, comprising:
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injecting a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, wherein injecting the first quantity of fuel comprises injecting a pilot fuel quantity of about 1 to 5 percent of a fuel quantity; and injecting a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke, wherein injecting the second quantity of fuel comprises injecting a majority fuel quantity of about 95 to 99 percent of the fuel quantity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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advancing fuel injection by a predetermined advance value to reduce specific fuel consumption in a compression-ignition engine of a locomotive; and splitting the fuel injection of a predetermined quantity of fuel into a pilot fuel quantity and a majority fuel quantity during a second half of a compression stroke and before top dead center of the compression stroke of the compression-ignition engine to reduce nitrogen oxide emissions associated with advancing the fuel injection; wherein advancing and splitting comprises modifying a fuel injection system of the compression-ignition engine to reduce the specific fuel consumption without increasing a pollutant emissions level. - View Dependent Claims (11, 12, 13, 14)
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15. A system, comprising:
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a controller configured to inject a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, and configured to inject a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke; wherein the controller is configured to inject the first quantity of fuel at the first predetermined time and the second quantity of fuel at the second predetermined time into the engine cylinder to reduce specific fuel consumption without increasing a pollutant emissions level. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A locomotive, comprising:
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a turbocharger; a compression-ignition engine include a plurality of specifications comprising a maximum in-cylinder pressure in the range of 80 to 240 bars, four stroke, stepped operation, speed in the range of 300 to 1500 revolutions per minute, displacement in the range of 5 to 20 liters per cylinder, and a common rail fuel injection system; and a controller coupled to the compression-ignition engine and configured to inject a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, and configured to inject a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke. - View Dependent Claims (25, 26, 27, 28)
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29. A method, comprising:
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providing a controller configured to inject a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, and configured to inject a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke; wherein the controller is configured to inject the first quantity of fuel at the first predetermined time and the second quantity of fuel at the second predetermined time into the engine cylinder to reduce specific fuel consumption without increasing a pollutant emissions level. - View Dependent Claims (30, 31, 32, 33)
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34. A tangible medium having a computer program, comprising:
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programming instructions disposed on the tangible medium, wherein the programming instructions include instructions to inject a first quantity of fuel into an engine cylinder at a first predetermined time during a second half of a compression stroke before a piston of the engine cylinder reaches top dead center of the compression stroke, and instructions to inject a second quantity of fuel into the engine cylinder at a second predetermined time after the first predetermined time when the piston is advanced by a predetermined advance value before the piston reaches the top dead center of the compression stroke; wherein the programming instructions are configured to inject the first quantity of fuel at the first predetermined time and the second quantity of fuel at the second predetermined time into the engine cylinder to reduce specific fuel consumption without increasing a pollutant emissions level. - View Dependent Claims (35)
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Specification