Method and systems for adjusting engine cylinder operation based on a knock sensor output
First Claim
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1. A method for a multi-fuel engine, comprising:
- individually adjusting, for each cylinder of the engine, one or more of a gas flow of gaseous fuel, a diesel flow of diesel fuel, an injection or induction timing of gaseous fuel, and/or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and an individual cylinder reference value.
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Abstract
Various methods and systems are provided for individually adjusting fueling to cylinders of an engine based on an output of a knock sensor coupled to each cylinder. In one embodiment, a method for a multi fuel engine comprises individually adjusting, for each cylinder of the engine, one or more of a gas flow rate of gaseous fuel, a diesel flow rate of diesel fuel, an injection or induction timing of gaseous fuel, or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and a reference value of individual cylinder output.
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Citations
20 Claims
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1. A method for a multi-fuel engine, comprising:
individually adjusting, for each cylinder of the engine, one or more of a gas flow of gaseous fuel, a diesel flow of diesel fuel, an injection or induction timing of gaseous fuel, and/or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and an individual cylinder reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for a multi fuel engine, comprising:
based on an output of an individual knock sensor coupled to an individual cylinder of a plurality of engine cylinders of the engine, a knock limit, and a cylinder pressure reference value for the plurality of engine cylinders; during a first condition, adjusting one or more of diesel fuel injection timing or gaseous fuel injection or induction timing to the individual cylinder; during a second condition, adjusting one or more of an amount of diesel fuel or gaseous fuel injected into the individual cylinder; and during a third condition, adjusting both one or more of the diesel fuel injection timing or the gaseous fuel injection or induction timing and one or more of the amount of diesel fuel or gaseous fuel injected into the individual cylinder. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A multi fuel engine, comprising:
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a plurality of cylinders; a respective knock sensor coupled to each cylinder of the plurality of cylinders; and a controller having a non-transitory memory with computer-readable instructions for; for each cylinder of the plurality of cylinders, adjusting one or more of a flow of gaseous fuel, a flow of diesel fuel, an injection or induction timing of gaseous fuel, or an injection timing of diesel fuel into each cylinder based on each of an output of the knock sensor coupled to a corresponding cylinder, a knock threshold for current engine operating conditions, and a reference mean value of an individual cylinder pressure. - View Dependent Claims (20)
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Specification