Control device for internal combustion engines

Abstract

To improve the accuracy of estimating the amount of particulate matter burned in the filter. [Solution] The internal combustion engine 10 is equipped with a GPF 18 provided in the exhaust passage 15 to collect particulate matter in the exhaust. The control device 100 performs a process to calculate the amount of particulate matter deposited in the GPF 18 based on the amount of particulate matter discharged from the internal combustion engine 10 to the exhaust passage 15 and the amount of particulate matter burned in the GPF 18. The control device 100 performs a combustion amount calculation process to calculate the amount of particulate matter burned according to the degree of variation in the amount of particulate matter deposited in the GPF 18 in the exhaust flow direction.

Claims

1. Applicable to internal combustion engines equipped with a filter in the exhaust passage for collecting particulate matter in the exhaust, A control device that performs a process to calculate the amount of particulate matter deposited on the filter based on the amount of particulate matter discharged from the internal combustion engine into the exhaust passage and the amount of particulate matter burned in the filter, It has a processing circuit, The aforementioned processing circuit is The system performs a combustion amount calculation process to calculate the combustion amount according to the degree of variation in the amount of particulate matter deposited in the exhaust flow direction of the filter. Control device for internal combustion engines.

2. In the combustion amount calculation process, when the degree of variation is small, the combustion amount is calculated to be higher than when the degree of variation is large. A control device for an internal combustion engine according to claim 1.

3. The aforementioned processing circuit is An index value calculation process is performed to calculate an index value that indicates the degree of variation, In the index value calculation process, the index value is updated to indicate that the degree of variation increases when the particulate matter is burning, while the index value is updated to indicate that the degree of variation decreases when the particulate matter is not burning. A control device for an internal combustion engine according to claim 1.

4. The combustion amount calculation process includes: a process for calculating a base value of the combustion amount based on a value correlated with the combustion amount; and a process for calculating a correction value to correct the base value based on the index value. The control device for an internal combustion engine according to claim 3.

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