Control apparatus for internal combustion engine and control method for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShigeki Miyashita
Life of this patent
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Abstract
A control apparatus for an internal combustion engine includes an electronic control unit that is configured to perform an operation of making a lift amount of a specific valve corresponding to one of either intake ports or exhaust ports for a specific cylinder in which an amount of condensate water produced in the port or flowing into the port is larger than in the other cylinders when the engine is stopped, in a case where production of condensate water in the ports or inflow of condensate water into the ports is predicted.
Claims11
A control apparatus for an internal combustion engine, the internal combustion engine including a plurality of cylinders and ports, the ports including intake ports and exhaust ports corresponding to the plurality of the cylinders respectively, and the internal combustion engine being an internal combustion engine in which amounts of condensate water produced in the ports or flowing into the ports are different from one another among the cylinders due to differences in shape or arrangement of the ports or conduits leading to the ports among the plurality of the cylinders as to either the intake ports or the exhaust ports,
- the control apparatus comprising
- an electronic control unit configured to perform an operation of making a lift amount of a specific valve corresponding to one of either the intake ports or the exhaust ports equal to zero for a specific cylinder when the internal combustion engine is stopped, in a case where the electronic control unit predicts that condensate water is produced in one of either the intake ports or the exhaust ports or condensate water flows into one of either the intake ports or the exhaust ports, and the specific cylinder being a cylinder in which an amount of condensate water produced in one of either the corresponding intake ports or the corresponding exhaust ports or condensate water flowing into one of either the corresponding intake ports or the corresponding exhaust ports is larger than in the other ones of the plurality of the cylinders.
A control method for an internal combustion engine, the internal combustion engine including a plurality of cylinders and ports, the ports including intake ports and exhaust ports corresponding to the plurality of the cylinders respectively, and the internal combustion engine being an internal combustion engine in which amounts of condensate water produced in the ports or flowing into the ports are different from one another among the cylinders due to differences in shape or arrangement of the ports or conduits leading to the ports among the plurality of the cylinders as to either the intake ports or the exhaust ports,
- the control method comprising:
- performing, by an electronic control unit, an operation of making a lift amount of a specific valve corresponding to one of either the intake ports or the exhaust ports for a specific cylinder when the internal combustion engine is stopped, in a case where the electronic control unit predicts that condensate water is produced in one of either the intake ports or the exhaust ports or condensate water flows into one of either the intake ports or the exhaust ports, and the specific cylinder being a cylinder in which an amount of condensate water produced in one of either the corresponding intake ports or the corresponding exhaust ports or condensate water flowing into one of either the corresponding intake ports or the corresponding exhaust ports is larger than in the other ones of the plurality of the cylinders.
Dependencies are inferred from the claim text.