CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
First Claim
1. A control device for an internal combustion engine, the control device comprising:
- a turbine for a turbocharger that is installed in an exhaust path of the internal combustion engine;
a catalyst installed in the exhaust path and disposed downstream of the turbine;
a bypass path for bypassing the turbine by connecting the exhaust path upstream of the turbine to the exhaust path between the turbine and the catalyst;
a waste gate valve capable of opening and closing the bypass path;
turbocharger temperature acquisition means for acquiring a temperature of the turbocharger;
speed reduction fuel cut operation execution means for performing a speed reduction fuel cut operation by shutting off the supply of fuel to the internal combustion engine at the time of vehicle speed reduction; and
waste gate valve opening means for opening the waste gate valve when the speed reduction fuel cut operation is performed in a situation where the temperature is higher than a temperature setting.
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Accused Products
Abstract
An object of the present invention is to provide a control device that is used for an internal combustion engine with a turbocharger and capable of suppressing the deterioration of a catalyst when a speed reduction fuel cut is performed in a situation where the temperature of the turbocharger is high. The control device includes a turbine for the turbocharger installed in an exhaust path of the internal combustion engine, a catalyst installed in the exhaust path and disposed downstream of the turbine, a bypass path for bypassing the turbine by connecting the exhaust path upstream of the turbine to the exhaust path between the turbine and the catalyst, and a waste gate valve capable of opening and closing the bypass path. The control device opens the waste gate valve when a speed reduction fuel cut operation is performed in a situation where the temperature of the turbocharger is higher than its setting.
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Citations
10 Claims
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1. A control device for an internal combustion engine, the control device comprising:
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a turbine for a turbocharger that is installed in an exhaust path of the internal combustion engine; a catalyst installed in the exhaust path and disposed downstream of the turbine; a bypass path for bypassing the turbine by connecting the exhaust path upstream of the turbine to the exhaust path between the turbine and the catalyst; a waste gate valve capable of opening and closing the bypass path; turbocharger temperature acquisition means for acquiring a temperature of the turbocharger; speed reduction fuel cut operation execution means for performing a speed reduction fuel cut operation by shutting off the supply of fuel to the internal combustion engine at the time of vehicle speed reduction; and waste gate valve opening means for opening the waste gate valve when the speed reduction fuel cut operation is performed in a situation where the temperature is higher than a temperature setting. - View Dependent Claims (2, 3, 4, 5)
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6. A control device for an internal combustion engine, the control device comprising:
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a turbine for a turbocharger that is installed in an exhaust path of the internal combustion engine; a catalyst installed in the exhaust path and disposed downstream of the turbine; a bypass path for bypassing the turbine by connecting the exhaust path upstream of the turbine to the exhaust path between the turbine and the catalyst; a waste gate valve capable of opening and closing the bypass path; turbocharger temperature acquisition unit for acquiring a temperature of the turbocharger; speed reduction fuel cut operation execution unit for performing a speed reduction fuel cut operation by shutting off the supply of fuel to the internal combustion engine at the time of vehicle speed reduction; and waste gate valve opening unit for opening the waste gate valve when the speed reduction fuel cut operation is performed in a situation where the temperature is higher than a temperature setting. - View Dependent Claims (7, 8, 9, 10)
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Specification