Differential cylinder balancing for internal combustion engine
AssigneeTransportation IP Holdings, LLC
InventorAdam Edgar Klingbeil
Life of this patent
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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.
Claims17
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 in a first fuel operation;
- calculating a first exhaust temperature profile based on the first fuel operation;
- injecting a second fuel and the first fuel into the plurality of cylinders of the internal combustion engine in a duel fuel operation;
- calculating a duel fuel exhaust temperature profile based on the duel fuel operation;
- and
- adjusting at least one engine operating parameter in the duel fuel operation based on differentials between individual cylinder exhaust temperatures and a mean exhaust temperature of one or more exhaust temperature profiles.
A method of operating an internal combustion engine comprising:
- injecting a fuel into a plurality of cylinders of an internal combustion engine during a first operation mode;
- obtaining a first exhaust temperature profile during the first operation mode;
- during a second operation mode, injecting the fuel into the plurality of cylinders under an operating condition other than the first operating condition;
- obtaining a second exhaust temperature profile during the second operation mode;
- and
- adjusting one of an injection quantity and a spark timing in at least one of the plurality of cylinders based on individual exhaust temperatures and a mean exhaust temperature of the first and second exhaust temperature profile.
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 in a first fuel operation;
- obtaining a first fuel engine operating profile and first 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 in a duel fuel operation;
- obtaining a duel fuel engine operating profile and second exhaust temperature profile during the duel fuel operation;
- and
- adjusting one of an injection quantity and an injection timing of one of a first fuel and a second fuel in at least one of the plurality of cylinders based on individual cylinder temperatures and a mean cylinder temperature of the first and second exhaust temperature profiles.
Dependencies are inferred from the claim text.