摘要:
A knock control apparatus includes: a knock sensor for detecting knock of an internal combustion engine; a signal processing section for calculating a knock intensity; and knock determination level setting sections: for calculating an average value of the knock intensity; for calculating, based on the average value, an overall variance of the knock intensity of an entirety of a frequency distribution, a higher variance of the knock intensity above the average value, and a lower variance of the knock intensity below the average value; for calculating a standard deviation of the knock intensity from the overall variance; for presetting a value allowing the frequency distribution of the knock intensity to be a predetermined confidence interval as a confidence coefficient; and for setting a sum of the average value and a value obtained by multiplying the standard deviation by the corrected confidence coefficient as a knock determination level.
摘要:
An operation status value detection unit detects two or more operation status values indicating an operation status of an internal combustion engine. A filtering processing unit applies filtering processing to the detected operation status values, and an operation status value difference calculation unit calculates the difference between the filter-processed operation status value and the corresponding non-filter-processed operation status value so as to calculate two or more operation status value differences. An operation status value difference normalization unit normalizes the two or more operation status value differences, based on predetermined reference values for the two or more operation status values, so as to calculate two or more normalized operation status value differences; and a transient correction unit corrects a control amount for controlling output of the internal combustion engine, based thereon, when the engine is in a transient-operation mode.
摘要:
A knock control apparatus includes: a knock sensor for detecting knock of an internal combustion engine; a signal processing section for calculating a knock intensity; and knock determination level setting sections: for calculating an average value of the knock intensity; for calculating, based on the average value, an overall variance of the knock intensity of an entirety of a frequency distribution, a higher variance of the knock intensity above the average value, and a lower variance of the knock intensity below the average value; for calculating a standard deviation of the knock intensity from the overall variance; for presetting a value allowing the frequency distribution of the knock intensity to be a predetermined confidence interval as a confidence coefficient; and for setting a sum of the average value and a value obtained by multiplying the standard deviation by the corrected confidence coefficient as a knock determination level.
摘要:
A knock control apparatus for internal combustion engine includes: a knock signal normalization unit that normalizes a knock signal extracted from an output signal of a knock sensor; a knock determination threshold setting unit that sets a knock determination threshold on the basis of the normalized knock signal; a knock intensity computation unit that calculates knock intensity on the basis of the normalized knock signal and the set knock determination threshold; a knock determination unit that determines a presence or absence of a knock on the basis of the calculated knock intensity; and a knock correction amount computation unit that calculates a knock correction amount to correct the calculated knock intensity in a case where an occurrence of a knock is determined. The knock signal normalization unit normalizes a standard deviation of the knock signal by dividing the knock signal by an average value of the knock signal.
摘要:
A knock correction amount computation portion computes, on the basis of intensity of a knock in a case where the presence of an occurrence of the knock is determined, a knock correction amount by which to move a spark timing of the internal combustion engine to be on a retard side and returns the knock correction amount to be back on an advance side in a case where the absence of an occurrence of a knock is determined. In a case where a value of the knock correction amount to be on the retard side becomes equal to or exceeds a predetermined value, the knock correction amount computation portion limits and holds the knock correction amount at the predetermined value and returns the limited knock correction amount to be back on the advance side in a case where the absence of an occurrence of a knock is determined.
摘要:
A control device of an internal combustion engine includes a filter processing portion which performs a filter processing on the vibration level extracted by the vibration level extraction portion, and calculates a vibration level after the filter processing; and an abnormal ignition suppression control portion which compares the vibration level after the filter processing to the abnormal ignition determination value when a retard correction equal to or greater than a predetermined value is performed by the knock control portion, in a case where it is determined that the vibration level after the filter processing is equal to or greater than the abnormal ignition determination value, determines that the abnormal ignition is generated in the internal combustion engine, corrects and controls the combustion control portion in a direction of suppressing the abnormal ignition.
摘要:
A control apparatus for an internal combustion engine includes: an abnormal combustion detection unit for detecting an abnormal combustion due to self-ignition occurring; a pre-ignition determination unit for detecting abnormal combustion occurrence timing based on abnormal combustion detection information to determine whether or not the abnormal combustion is the pre-ignition based on comparison between pre-ignition determination timing and the abnormal combustion occurrence timing; a heat-source pre-ignition determination unit for determining whether the pre-ignition is the heat-source pre-ignition or the compression pre-ignition based on comparison between the abnormal combustion occurrence timing set by the pre-ignition determination timing and heat-source pre-ignition determination timing; a first avoidance unit for avoiding the heat-source pre-ignition in a case where the pre-ignition is determined as the heat-source pre-ignition; and a second avoidance unit for avoiding the compression pre-ignition in a case where the pre-ignition is determined as the compression pre-ignition.
摘要:
Control apparatus for an internal combustion engine including: a second knock detection unit for detecting occurrence of a second knock due to an effective compression ratio when ignition timing is on a retard side of a predetermined value in the case where a first knock is detected; a second knock suppression unit for suppressing the second knock when the second knock is detected; a first abnormal ignition detection means for detecting occurrence of first abnormal ignition due to the pre-ignition or the post-ignition when a knock intensity of the second knock is equal to or larger than a predetermined value; and a first abnormal ignition suppression unit for suppressing the first abnormal ignition by performing fuel control for the internal combustion engine when the first abnormal ignition is detected.
摘要:
An estimation device for a cylinder intake air amount and an internal EGR rate in an internal combustion engine is provided which is capable of making an estimation with a high degree of accuracy in a small number of adaptation constants. The estimation device calculates a volumetric efficiency corresponding value and the internal EGR rate based on an exhaust efficiency (a linear function of intake pipe internal pressure) which is an index indicating an amount of residual gas which is an exhaust gas after combustion remaining in the cylinder without being discharged from the cylinder to an exhaust pipe, and an intake efficiency (a linear function of intake pipe internal pressure) which is an index indicating an amount of air coming into the cylinder from the intake pipe excluding the residual gas.
摘要:
In throttle control, a throttle opening is set with sufficient control accuracy in accordance with the operating state of an engine despite variations in a throttle body and various kinds of sensors. A target effective opening area is calculated from a target amount of intake air, an atmospheric pressure, an intake pipe internal pressure and an intake air temperature by using a flow rate formula for a throttle type flow meter. A target throttle opening is calculated from a correlation map. An actual effective opening area is calculated from the amount of intake air, the atmospheric pressure, the intake pipe internal pressure, and the intake air temperature by using the above-mentioned flow rate formula, and a learning throttle opening is calculated from the correlation map. The target throttle opening is corrected by a throttle opening learning value calculated from a deviation between the target throttle opening and the learning throttle opening.