Method and device for determining operating parameters in an internal combustion engine
First Claim
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1. A method for controlling an internal combustion engine, comprising the steps of:
- supplying a sensor output signal from a sensor to first and second filters, the sensor including at least one of a structure-borne noise sensor and a knock sensor, the first and second filters exhibiting different response characteristics;
determining at least two values corresponding to at least one of a combustion parameter and an injection parameter of the engine as a function of first and second output signals from the first and second filters, respectively; and
determining a control value indicative of a time when at least one of a first value of the first output signal and a second value of the second output signal exceeds a predetermined threshold value, the engine being controlled as a function of the control value.
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Abstract
A method and a device for controlling an internal combustion engine, in particular a diesel gasoline engine. The output signal from at least one structure-borne noise sensor is supplied to at least one first and one second filter means, which exhibit different response characteristics. On the basis of the output signals from the filmer means, at least two quantities that characterize the combustion and/or the injection in the internal combustion engine are able to be determined.
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Citations
11 Claims
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1. A method for controlling an internal combustion engine, comprising the steps of:
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supplying a sensor output signal from a sensor to first and second filters, the sensor including at least one of a structure-borne noise sensor and a knock sensor, the first and second filters exhibiting different response characteristics; determining at least two values corresponding to at least one of a combustion parameter and an injection parameter of the engine as a function of first and second output signals from the first and second filters, respectively; and determining a control value indicative of a time when at least one of a first value of the first output signal and a second value of the second output signal exceeds a predetermined threshold value, the engine being controlled as a function of the control value. - View Dependent Claims (2, 3, 4, 7)
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5. A method for controlling an internal combustion engine, comprising the steps of:
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supplying a sensor output signal from a sensor to first and second filters, the sensor including at least one of a structure-borne noise sensor and a knock sensor, the first and second filters exhibiting different response characteristics; determining at least two values corresponding to at least one of a combustion parameter and an injection parameter of the engine as a function of first and second output signals from the first and second filters, respectively; and deriving a signal indicative of at least one of a start of injection and an end of injection as a function of the first output signal.
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6. A method for controlling an internal combustion engine, comprising the steps of:
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supplying a sensor output signal from a sensor to first and second filters, the sensor including at least one of a structure-borne noise sensor and a knock sensor, the first and second filters exhibiting different response characteristics; determining at least two values corresponding to at least one of a combustion parameter and an injection parameter of the engine as a function of first and second output signals from the first and second filters, respectively; and deriving a signal indicative of a start of combustion as a function of the second output signal.
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8. A device for controlling an internal combustion engine, comprising:
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at least one structure-borne noise sensor providing a sensor output signal; first and second filters receiving the sensor output signal and providing first and second output signals, respectively, the first and second filters exhibiting different response characteristics; and a control unit determining at least two values corresponding to at least one of a combustion parameter and an injection parameter of the engine as a function of the first and second output signals, wherein the control unit determine a control value indicative of a time when at least one of a first value of the first output signal and a second value of the second output signal exceeds a predetermined threshold value, the engine being controlled as a function of the control value. - View Dependent Claims (9)
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10. A method for controlling an internal combustion engine, comprising the steps of:
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supplying a sensor output signal from a sensor to first and second filters, the sensor including at least one of a structure-borne noise sensor and a knock sensor, the first and second filters exhibiting different response characteristics and generating first and second output signals, respectively; determining a first operating signal indicative of at least one of a start time of injection and an end time of injection as a function of the first output signal; and determining a second operating signal indicative of a start time of combustion as a function of the second output signal.
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11. A device for controlling an internal combustion engine, comprising:
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at least one structure-borne noise sensor providing a sensor output signal; first and second filters receiving the sensor output signal and providing first and second output signals, respectively, the first and second filters exhibiting different response characteristics; and a control unit determining a first operating signal indicative of at least one of a start time of injection and an end time of injection as a function of the first output signal, the control unit determining a second operating signal indicative of a start time of combustion as a function of the second output signal, the control unit controlling the engine as a function of the first and second operating signals.
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Specification