CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER
First Claim
1. A control apparatus for an internal combustion engine with a supercharger, comprising:
- a supercharger having a centrifugal compressor;
rotation speed acquisition means for acquiring compressor rotation speed of the centrifugal compressor;
first operating parameter acquisition means for acquiring an operating parameter, which is correlated to an operating characteristic of the centrifugal compressor the fluctuation of which is fewer than that of an intake manifold pressure, for the internal combustion engine;
base limit rotation speed acquisition means for acquiring surge limit compressor rotation speed on the basis of the operating parameter;
second operating parameter acquisition means for acquiring a second operating parameter, which affects an air flow amount passing through the centrifugal compressor and which is different from the first operating parameter, for the internal combustion engine;
corrected limit rotation speed acquisition means for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and
compressor control means for controlling compressor rotation speed on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed.
1 Assignment
0 Petitions
Accused Products
Abstract
An air flow amount passing through a centrifugal compressor is acquired on the basis of outputs of an air flow meter. A surge limit compressor rotation speed is acquired on the basis of the obtained air flow amount passing through the compressor. A current compressor rotation speed (turbo rotation speed) is acquired by a turbo rotation speed sensor. A rotation speed of the compressor is controlled on the basis of the surge limit compressor rotation speed and the current compressor rotation speed. More specifically, while being limited so as to be equal or less than the surge limit compressor rotation speed, a target compressor rotation speed is controlled so as to be a value according to the operating conditions, such as accelerator opening and engine speed, of an internal combustion engine. In addition, the surge of the compressor is judged on the basis of the surge limit compressor rotation speed and the current compressor rotation speed.
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Citations
13 Claims
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1. A control apparatus for an internal combustion engine with a supercharger, comprising:
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a supercharger having a centrifugal compressor; rotation speed acquisition means for acquiring compressor rotation speed of the centrifugal compressor; first operating parameter acquisition means for acquiring an operating parameter, which is correlated to an operating characteristic of the centrifugal compressor the fluctuation of which is fewer than that of an intake manifold pressure, for the internal combustion engine; base limit rotation speed acquisition means for acquiring surge limit compressor rotation speed on the basis of the operating parameter; second operating parameter acquisition means for acquiring a second operating parameter, which affects an air flow amount passing through the centrifugal compressor and which is different from the first operating parameter, for the internal combustion engine; corrected limit rotation speed acquisition means for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and compressor control means for controlling compressor rotation speed on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control apparatus for an internal combustion engine with a supercharger, comprising:
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a supercharger having a centrifugal compressor; rotation speed acquisition means for acquiring compressor rotation speed of the centrifugal compressor; first operating parameter acquisition means for acquiring an operating parameter, which is correlated to an operating characteristic of the centrifugal compressor the fluctuation of which is fewer than that of an intake manifold pressure, for the internal combustion engine; base limit rotation speed acquisition means for acquiring base surge limit compressor rotation speed on the basis of the operating parameter; second operating parameter acquisition means for acquiring a second operating parameter, which affects an air flow amount passing through the centrifugal compressor and which is different from the first operating parameter, for the internal combustion engine; corrected limit rotation speed acquisition means for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and surge judgment means for judging surge of the centrifugal compressor on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed. - View Dependent Claims (8, 9, 10, 11)
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12. A control apparatus for an internal combustion engine with a supercharger, comprising:
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a supercharger having a centrifugal compressor; a rotation speed acquisition device to acquire compressor rotation speed of the centrifugal compressor; a first operating parameter acquisition device to acquire a first operating parameter, which is correlated to an operating characteristic of the centrifugal compressor, the fluctuation of which is fewer than that of an intake manifold pressure, for the internal combustion engine; a base limit rotation speed acquisition device to acquire base surge limit compressor rotation speed on the basis of the first operating parameter; a second operating parameter acquisition device for acquiring a second operating parameter, which affects an air flow amount passing through the centrifugal compressor and which is different from the first operating parameter, for the internal combustion engine; a corrected limit rotation speed acquisition device for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and a compressor control device for controlling compressor rotation speed on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed.
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13. A control apparatus for an internal combustion engine with a supercharger, comprising:
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a supercharger having a centrifugal compressor; a rotation speed acquisition device for acquiring compressor rotation speed of the centrifugal compressor; a first operating parameter acquisition device for acquiring a first operating parameter, which is correlated to an operating characteristic of the centrifugal compressor the fluctuation of which is fewer than that of an intake manifold pressure, for the internal combustion engine; a base limit rotation speed acquisition device for acquiring base surge limit compressor rotation speed on the basis of the first operating parameter; a second operating parameter acquisition device for acquiring a second operating parameter, which affects an air flow amount passing through the centrifugal compressor and which is different from the first operating parameter, for the internal combustion engine; a corrected limit rotation speed acquisition device for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and a surge judgment device for judging surge of the centrifugal compressor on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed.
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Specification