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US 11,047,285 B2Granted
Control apparatus of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakuya Hirai, Takashi Hotta, Yuji Miyoshi
Life of this patent
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Abstract
A control apparatus of an internal combustion engine controls a heat exchange cooling water flow rate which is a flow rate of cooling water supplied to an exhaust heat recovery cooler apparatus, to a larger flow rate when the control apparatus executes an EGR control, and the exhaust heat recovery cooler apparatus performs an exhaust heat recovery function, than when the control apparatus executes the EGR control, and the exhaust heat recovery cooler apparatus does not perform the exhaust heat recovery function.
Claims16
A control apparatus of an internal combustion engine, comprising:
- an EGR apparatus having an EGR gas supply function to supply, to an intake passage of the internal combustion engine as an EGR gas, at least a part of an exhaust gas discharged from at least one combustion chamber of the internal combustion engine to an exhaust passage of the internal combustion engine;
- an exhaust heat recovery cooler apparatus having:
- an exhaust gas supplying function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by cooling water, and (iii) supply the cooled exhaust gas to the EGR apparatus as the EGR gas when an EGR control to supply the exhaust gas to the intake passage as the EGR gas by the EGR apparatus is executed;
- and
- an exhaust heat recovery function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by cooling water, and (iii) return the cooled exhaust gas to the exhaust passage,
- wherein the exhaust heat recovery cooler apparatus comprises an exhaust valve configured to control an amount of exhaust gas directed into the exhaust heat recovery cooler apparatus from the exhaust passage, and a position of the exhaust valve is controlled based on a temperature of the cooling water;
- and
- an electronic control unit which controls an activation of the EGR apparatus,
- wherein the electronic control unit is configured to control a heat exchange cooling water flow rate which is a flow rate of the cooling water supplied to the exhaust heat recovery cooler apparatus, to a larger flow rate when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, and (ii) the exhaust heat recovery cooler apparatus performs the exhaust heat recovery function, than when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, and (ii) the exhaust heat recovery cooler apparatus does not perform the exhaust heat recovery function,
- wherein the electronic control unit is configured to control the heat exchange cooling water flow rate to the larger flow rate when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, (ii) the exhaust heat recovery function is not performed, and (iii) a flow rate of the EGR gas is relatively large, than when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, (ii) the exhaust heat recovery function is not performed, and (iii) the flow rate of the EGR gas is relatively small.
7 more elements
A control apparatus of an internal combustion engine, comprising:
- an EGR apparatus having an EGR gas supply function to supply, to an intake passage of the internal combustion engine as an EGR gas, at least a part of an exhaust gas discharged from at least one combustion chamber of the internal combustion engine to an exhaust passage of the internal combustion engine;
- an exhaust heat recovery cooler apparatus having:
- an exhaust gas supplying function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by a coolant, and (iii) supply the cooled exhaust gas to the EGR apparatus as the EGR gas when an EGR control to supply the exhaust gas to the intake passage as the EGR gas by the EGR apparatus is executed;
- and
- an exhaust heat recovery function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by the coolant, and (iii) return the cooled exhaust gas to the exhaust passage;
- and
- an electronic control unit which controls an activation of the EGR apparatus,
- wherein the electronic control unit is configured to control a coolant flow rate to a larger flow rate when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, (ii) the exhaust heat recovery function is not performed, and (iii) a flow rate of the EGR gas is relatively large, than when (i) the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, (ii) the exhaust heat recovery function is not performed, and (iii) the flow rate of the EGR gas is relatively small.
5 more elements
A control apparatus of an internal combustion engine, comprising:
- an EGR apparatus having an EGR gas supply function to supply, to an intake passage of the internal combustion engine as an EGR gas, at least a part of an exhaust gas discharged from at least one combustion chamber of the internal combustion engine to an exhaust passage of the internal combustion engine;
- an exhaust heat recovery cooler apparatus having:
- an exhaust gas supplying function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by a coolant, and (iii) supply the cooled exhaust gas to the EGR apparatus as the EGR gas when an EGR control to supply the exhaust gas to the intake passage as the EGR gas by the EGR apparatus is executed;
- and
- an exhaust heat recovery function to (i) draw at least a part of the exhaust gas, which is discharged from the at least one combustion chamber, into the exhaust heat recovery cooler apparatus from the exhaust passage, (ii) cool the drawn exhaust gas by the coolant, and (iii) return the cooled exhaust gas to the exhaust passage;
- and
- an electronic control unit which controls an activation of the EGR apparatus,
- wherein the electronic control unit is configured to control a flow rate of the coolant based on (i) whether the electronic control unit controls the activation of the EGR apparatus to execute the EGR control, (ii) whether the exhaust heat recovery cooler apparatus performs the exhaust heat recovery function, and (iii) a flow rate of the EGR gas,
- wherein the exhaust heat recovery cooler apparatus comprises an exhaust valve, wherein the exhaust valve is configured to prevent the exhaust gas drawn into the exhaust heat recovery cooler apparatus from returning to the exhaust passage based on a signal from the electronic control unit.
6 more elements
Dependencies are inferred from the claim text.