Control device for internal combustion engine

Abstract

The present invention relates to a control device for an internal combustion engine including a first control subject (35D) capable of controlling two different control amounts (Pim and Regr) influencing each other at a low frequency and second control subjects (52 and 33) capable of controlling the control amount at a high frequency. In the present invention, the first control amount and the second control amount are changed by the first control subject, and the first control amount and the second control amount are changed by the second control subject. Further, in the present invention, an operation amount (Mv) is input to the first control subject so that a first control amount deviation component (”PimL) with respect to a target value changing at a low frequency and a second control amount deviation component (”RegrL) with respect to the target value become zero, and operation amounts (Megr and Mth) are input to the second control subject so that a first control amount deviation component (”PimH) with respect to a target value changing at a high frequency and a second control amount deviation component (”RegrH) with respect to the target value become zero.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] Patent Document 1 describes a control device for an internal combustion engine. The internal combustion engine described in this Patent Document 1 includes a supercharger and an exhaust gas recirculation device. [0003] The supercharger increases the pressure of the gas entering the combustion chamber (hereinafter referred to as "boost pressure"), and is equipped with a compressor arranged in the intake passage, an exhaust turbine arranged in the exhaust passage, and A blade that raises or lowers the pressure of the exhaust gas in the exhaust passage on the upstream side of the gas turbine (hereinafter referred to as "exhaust pressure"). Furthermore, when the exhaust pressure is increased by changing the operating state of the vanes (more specifically, by reducing the opening of the vanes), the rotation speed of the exhaust turbine is increased...

AI Technical Summary

Problems solved by technology

In other words, there is a limit to the variation in the control amount that can be adequately supported by one of the control objects that can control the control amount at a relatively low frequency, and there is also a variation in the control amount that can sufficiently correspond to the other control object that can control the control amount at a relatively high frequency. limit

Moreover, it does not take into account that there is a limit to the deviation of the control amount that each control object can fully correspond to. In other words, it does not consider the characteristics of each control object. The control quantities are respectively controlled to the target control quantities, and it is also difficult to control each control quantity to the target control quantities with sufficient tracking

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