Avoidance of a safety fuel cut-off during partial engine operation
First Claim
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1. A method for operating an internal combustion engine that includes at least two cylinders, the method comprising:
- in a first operating mode, operating, by the internal combustion engine, in partial engine operation in which at least one of the at least two cylinders is not fired;
monitoring, by processing circuitry, the internal combustion engine, during the partial engine operation, for a potentially torque-increasing error; and
responsive to a detection in the monitoring step of the potentially torque-increasing error;
tracking, by the processing circuitry, an amount of time lapsed from a time of the detection without removal of the potentially torque-increasing error;
responsive to the tracked amount of time exceeding a first threshold time period, executing a control, by the processing circuitry, to switch over operation of the internal combustion engine from the partial engine operation to a full engine operation in which all of the at least two cylinders are fired; and
the processing circuitry responding to a case where the switch over has not occurred by a time at which the tracked amount of time exceeds a second threshold time period that is greater than the first threshold time period by executing a control to operate the internal combustion engine with a safety fuel cut-off.
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Abstract
A method for operating an internal combustion engine that includes at least two cylinders, includes operating the internal combustion engine in a first operating mode in partial engine operation, in which at least one of the cylinders is not fired, monitoring the internal combustion engine during the partial engine operation for potentially torque-increasing errors, and switching over from the partial engine operation into a full engine operation in which all of the cylinders are fired when a potentially torque-increasing error is detected.
35 Citations
12 Claims
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1. A method for operating an internal combustion engine that includes at least two cylinders, the method comprising:
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in a first operating mode, operating, by the internal combustion engine, in partial engine operation in which at least one of the at least two cylinders is not fired; monitoring, by processing circuitry, the internal combustion engine, during the partial engine operation, for a potentially torque-increasing error; and responsive to a detection in the monitoring step of the potentially torque-increasing error; tracking, by the processing circuitry, an amount of time lapsed from a time of the detection without removal of the potentially torque-increasing error; responsive to the tracked amount of time exceeding a first threshold time period, executing a control, by the processing circuitry, to switch over operation of the internal combustion engine from the partial engine operation to a full engine operation in which all of the at least two cylinders are fired; and the processing circuitry responding to a case where the switch over has not occurred by a time at which the tracked amount of time exceeds a second threshold time period that is greater than the first threshold time period by executing a control to operate the internal combustion engine with a safety fuel cut-off. - View Dependent Claims (2, 3, 4, 5)
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6. A device for operating an internal combustion engine that includes at least two cylinders, the device comprising:
processing circuitry configured to; control the internal combustion engine to operate in a first operating mode in partial engine operation in which at least one of the at least two cylinders is not fired; monitor the internal combustion engine, during the partial engine operation, for a potentially torque-increasing error; and responsive to a detection in the monitoring step of the potentially torque-increasing error; track an amount of time lapsed from a time of the detection without removal of the potentially torque-increasing error; responsive to the tracked amount of time exceeding a first threshold time period, execute a control to switch over operation of the internal combustion engine from the partial engine operation to a full engine operation in which all of the at least two cylinders are fired; and respond to a case where the switch over has not occurred by a time at which the tracked amount of time exceeds a second threshold time period that is greater than the first threshold time period by executing a control to operate the internal combustion engine with a safety fuel cut-off. - View Dependent Claims (7, 8, 9, 10)
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11. A non-transitory computer-readable medium on which are stored instructions executable by a computer processor, the instructions which, when executed by the processor, cause the processor to perform a method for operating an internal combustion engine that includes at least two cylinders, the method comprising:
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controlling the internal combustion engine to operate in a first operating mode in partial engine operation in which at least one of the at least two cylinders is not fired; monitoring the internal combustion engine, during the partial engine operation, for a potentially torque-increasing error; and responsive to a detection in the monitoring step of the potentially torque-increasing error; tracking an amount of time lapsed from a time of the detection without removal of the potentially torque-increasing error; responsive to the tracked amount of time exceeding a first threshold time period, executing a control to switch over operation of the internal combustion engine from the partial engine operation to a full engine operation in which all of the at least two cylinders are fired; and responding to a case where the switch over has not occurred by a time at which the tracked amount of time exceeds a second threshold time period that is greater than the first threshold time period by executing a control to operate the internal combustion engine with a safety fuel cut-off.
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12. A method for operating an internal combustion engine that includes at least two cylinders, the method comprising:
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in a first operating mode, operating, by the internal combustion engine, in partial engine operation in which at least one of the at least two cylinders is not fired; monitoring, by processing circuitry, the internal combustion engine, during the partial engine operation, for a potentially torque-increasing error; and responsive to a detection in the monitoring step of the potentially torque-increasing error; tracking, by the processing circuitry, an amount of time lapsed from a time of the detection; responsive to the tracked amount of time exceeding a first threshold time period without removal of the potentially torque-increasing error, executing a control, by the processing circuitry, to switch over operation of the internal combustion engine from the partial engine operation to a full engine operation in which all of the at least two cylinders are fired; and responsive to the tracked amount of time exceeding a second threshold time period without removal of the potentially torque-increasing error, executing a control, by the processing circuitry, to operate the internal combustion engine with a safety fuel cut-off, wherein the second threshold time period is greater than the first threshold time period.
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Specification