DIFFERENTIAL CYLINDER BALANCING FOR INTERNAL COMBUSTION ENGINE
First Claim
1. A method of adjusting operation of an internal combustion engine, the method comprising:
- injecting a first fuel into a plurality of cylinders of the internal combustion engine, thereby defining a first fuel operation;
obtaining a first fuel exhaust temperature profile, during the first fuel operation;
injecting a second fuel and the first fuel into the plurality of cylinders of the internal combustion engine, thereby defining a duel fuel operation;
obtaining a duel fuel exhaust temperature profile, during the duel fuel operation; and
adjusting one of an injection quantity and an injection timing of one of the first fuel and the second fuel in at least one of the plurality of cylinders, based on a difference between the first fuel exhaust temperature profile and the duel fuel exhaust temperature profile.
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Accused Products
Abstract
A method of adjusting operation of an internal combustion engine includes injecting fuel into cylinders of the internal combustion engine (first fuel operation); obtaining a first fuel exhaust temperature profile during the first fuel operation; injecting two fuels into the cylinders in a duel fuel operation; obtaining a duel fuel exhaust temperature profile; and adjusting the injection quantity and/or an injection timing of one fuel in a cylinder(s), based on a difference between the first fuel exhaust temperature profile and the duel fuel exhaust temperature profile. Other methods of operating with single fuel and using sensors other than exhaust temperature sensors are disclosed.
18 Citations
19 Claims
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1. A method of adjusting operation of an internal combustion engine, the method comprising:
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injecting a first fuel into a plurality of cylinders of the internal combustion engine, thereby defining a first fuel operation; obtaining a first fuel exhaust temperature profile, during the first fuel operation; injecting a second fuel and the first fuel into the plurality of cylinders of the internal combustion engine, thereby defining a duel fuel operation; obtaining a duel fuel exhaust temperature profile, during the duel fuel operation; and adjusting one of an injection quantity and an injection timing of one of the first fuel and the second fuel in at least one of the plurality of cylinders, based on a difference between the first fuel exhaust temperature profile and the duel fuel exhaust temperature profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating an internal combustion engine comprising:
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injecting a fuel into a plurality of cylinders of an internal combustion engine, defining a baseline operation; obtaining a baseline exhaust temperature profile, during the baseline operation; injecting the fuel into the plurality of cylinders defining an operating condition other than the baseline operating condition; obtaining a second exhaust temperature profile; and adjusting one of an injection quantity and a spark timing of the fuel in at least one of the plurality of cylinders, based on a difference between the baseline exhaust temperature profile and the second exhaust temperature profile. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of adjusting operation of an internal combustion engine, the method comprising:
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injecting a first fuel into a plurality of cylinders of the internal combustion engine, thereby defining a first fuel operation; obtaining a first fuel engine operating profile, during the first fuel operation; injecting a second fuel and the first fuel into the plurality of cylinders of the internal combustion engine, thereby defining a duel fuel operation; obtaining a duel fuel engine operating profile, during the duel fuel operation; and adjusting one of an injection quantity and an injection timing of one of the first fuel and the second fuel in at least one of the plurality of cylinders, based on a difference between the first fuel engine operating profile and the duel fuel engine operating profile.
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19. A method of operating an internal combustion engine comprising:
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injecting a fuel into a plurality of cylinders of an internal combustion engine, defining a baseline operation; obtaining a baseline engine operating profile, during the baseline operation; injecting the fuel into the plurality of cylinders defining an operating condition other than the baseline operating condition; obtaining a second engine operating profile; and adjusting one of an injection quantity and a spark timing of the fuel in at least one of the plurality of cylinders, based on a difference between the baseline engine operating profile and the second engine operating profile.
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Specification