Method and device for operating an internal combustion engine
AssigneeRobert Bosch GmbH
InventorMichael Baeuerle
Life of this patent
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Abstract
A method and a device are provided for diagnosing operation of an internal combustion engine having a compressor for compressing air supplied to the internal combustion engine, which method and device permit diagnosis of as many error patterns in the compressor operation as possible without the use of additional sensors. An actual pressure ratio across the compressor is measured for a compression diagnosis. The measured actual pressure ratio is compared with a predetermined reference value, and an error is detected as a function of the result of the comparison.
Claims19
A method for operating an internal combustion engine, the internal combustion engine having a compressor to compress air supplied to the internal combustion engine, the method comprising:
- measuring an actual pressure ratio across the compressor for diagnosing a compression;
- comparing the measured actual pressure ratio to a modeled actual pressure ratio;
- and
- detecting an error as a function of a result of the comparing of the ratios, wherein the error is used to operate the internal combustion engine.
A method for diagnosing operation of an internal combustion engine having a compressor for compression of air supplied to the internal combustion engine, comprising:
- measuring an actual pressure ratio across the compressor;
- comparing the measured actual pressure ratio with a predetermined reference value;
- and
- detecting an error as a function of the result of the comparison;
- wherein the predetermined reference value is a setpoint pressure ratio across the compressor,
- wherein the compressor is an electrically operated supercharger, and
- wherein the electrically operated supercharger is triggered in a defined manner, as part of an early run-up.
A method for diagnosing operation of an internal combustion engine having a compressor for compression of air supplied to the internal combustion engine, comprising:
- measuring an actual pressure ratio across the compressor;
- comparing the measured actual pressure ratio with a predetermined reference value;
- and
- detecting an error as a function of the result of the comparison;
- wherein the predetermined reference value is a setpoint pressure ratio across the compressor,
- wherein the compressor is an electrically operated supercharger,
- wherein the diagnosis is performed in one of an idling state and a near-idling state, and
- wherein the electrically operated supercharger is triggered in a defined manner, as part of an early run-up.
A method for diagnosing operation of an internal combustion engine having a compressor for compression of air supplied to the internal combustion engine, comprising:
- measuring an actual pressure ratio across the compressor;
- comparing the measured actual pressure ratio with a predetermined reference value;
- and
- detecting an error as a function of the result of the comparison;
- wherein the predetermined reference value is a modeled actual pressure ratio determined based on at least one engine parameter,
- wherein the compressor is an electrically operated supercharger, and
- wherein the electrically operated supercharger is triggered in a defined manner, as part of an early run-up.
A method for diagnosing operation of an internal combustion engine having a compressor for compression of air supplied to the internal combustion engine, comprising:
- measuring an actual pressure ratio across the compressor;
- comparing the measured actual pressure ratio with a predetermined reference value;
- and
- detecting an error as a function of the result of the comparison;
- wherein the predetermined reference value is a modeled actual pressure ratio determined based on at least one engine parameter,
- wherein the compressor is an electrically operated supercharger,
- wherein the diagnosis is performed in one of an idling state and a near-idling state, and
- wherein the electrically operated supercharger is triggered in a defined manner, as part of an early run-up.
A device for operating an internal combustion engine, the internal combustion engine having a compressor to compress air supplied to the internal combustion engine, the device comprising:
- a determining arrangement, for diagnosing a compression, to determine an actual pressure ratio across the compressor from variables measured by a measuring arrangement;
- a comparing arrangement to compare the actual pressure ratio with a modeled actual pressure ratio;
- and
- an error detecting arrangement to detect an error as a function of a result of the comparing.
A device for operating an internal combustion engine, the internal combustion engine having a compressor to compress air supplied to the internal combustion engine, the device comprising:
- a determining arrangement, for diagnosing a compression, to determine an actual pressure ratio across the compressor from variables measured by a measuring arrangement;
- a comparing arrangement to compare the actual pressure ratio with a setpoint pressure ration that is to be set;
- and
- an error detecting arrangement to detect an error as a function of a result of the comparing.
A method for operating an internal combustion engine, the internal combustion engine having a compressor to compress air supplied to the internal combustion engine, the method comprising:
- measuring an actual pressure ratio across the compressor for diagnosing a compression;
- comparing the measured actual pressure ratio with a setpoint pressure ratio that is to be set;
- and
- detecting an error as a function of a result of the comparing.
Dependencies are inferred from the claim text.