# US 10,371,115 B2 · Control device for internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,115 B2 - Document ID: US10371115B2 - Status: Granted - Kind: B2 - Application number: 15/173,240 - Filed: 2016-06-03 - Published: 2016-12-08 - Granted: 2019-08-06 - Earliest claimed: 2015-06-05 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Takeshi Kitayama; Yoshiyuki Yamashita; Yoshihiro Furuya; Hiroki Murata - Web page: https://patentgrep.com/patent/US10371115B2 ## CPC - F02P 5/1502: {using one central computing unit} - F01P 7/04: by varying pump speed, e.g. by changing pump-drive gear ratio - F01P 7/167: {by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed} - F02D 41/06: for engine starting or warming up {(F02D41/0255 takes precedence)} - F02P 5/152: dependent on pinking (detecting or indicating knocks in internal-combustion engines G01L23/22) - F02P 17/12: Testing characteristics of the spark, ignition voltage or current (testing of sparking plugs H01T13/60) - F01P 7/165: {characterised by systems with two or more loops} - F01P 2003/027: {Cooling cylinders and cylinder heads in parallel} - F01P 2005/105: {Using two or more pumps} - F01P 2005/125: {Driving auxiliary pumps electrically} - F01P 2037/00: Controlling - F02P 5/1523: {with particular laws of return to advance, e.g. step by step, differing from the laws of retard} - F02P 2017/128: {for knock detection} - Y02T 10/40: Engine management systems - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A control device for an internal combustion engine includes a knock control system, a cooling system, and an electronic control unit. The knock control system is configured to ignite a spark plug an ignition crank angle obtained by retarding the ignition crank angle in response to an occurrence of the knocking. The electronic control unit is configured to supply a command value corresponding to a target value of a cooling parameter to the cooling system such that the cooling system performs cooling of the internal combustion engine according to the command value. The electronic control unit is configured to correct the command value based on a KCS learned value such that as the KCS learned value increases, a correction amount for correcting the command value increases in correction amount in a direction in which a cooling capacity of the cooling system increases. ## Claims ### Claim 1 A control device for an internal combustion engine, comprising: a knock control system configured to calculate a knock control system (KCS) learned value according to presence or absence of knocking of the internal combustion engine such that the KCS learned value is updated in an increase direction when the knocking occurs and is updated in a decrease direction when the knocking does not occur, the knock control system configured to calculate an ignition crank angle based on the KCS learned value, the knock control system configured to ignite a spark plug of the internal combustion engine at an ignition crank angle obtained by retarding the ignition crank angle in response to an occurrence of the knocking; a cooling system configured to cool the internal combustion engine; and an electronic control unit configured to supply a command value corresponding to a target value of a cooling parameter to the cooling system such that the cooling system performs cooling of the internal combustion engine according to the command value, the electronic control unit configured to correct the command value based on the KCS learned value such that as the KCS learned value increases, a correction amount for correcting the command value increases in correction amount in a direction in which a cooling capacity of the cooling system increases, wherein the internal combustion engine includes a first cooling system that mainly cools a cylinder block of the internal combustion engine and a second cooling system that mainly cools a periphery of an intake port compared to the first cooling system, the first cooling system and the second cooling system respectively include cooling medium flow passages independent of each other, and the electronic control unit is configured to supply the command value to the second cooling system. ### Claim 2 (depends on 1) The control device for the internal combustion engine according to claim 1, wherein the electronic control unit is configured not to correct the command value when a number of times of updating the KCS learned value according to the presence or absence of the knocking is less than a predetermined value, and is configured to correct the command value when the number of times of updating the KCS learned value is the predetermined value or more. ### Claim 3 (depends on 1) The control device for the internal combustion engine according to claim 1, wherein the electronic control unit is configured to update a cooling parameter learned value based on the KCS learned value such that as the KCS learned value increases, an update amount for updating the cooling parameter learned value increases in update amount in a direction in which the cooling capacity of the cooling system increases, and the electronic control unit is configured to determine the target value based on a base value of the cooling parameter and the cooling parameter learned value. ### Claim 4 (depends on 3) The control device for the internal combustion engine according to claim 3, wherein the electronic control unit is configured to calculate the update amount of the cooling parameter learned value based on the KCS learned value and to update the cooling parameter learned value with the update amount such that as the KCS learned value increases, the update amount increases in update amount in the direction in which the cooling capacity of the cooling system increases. ### Claim 5 (depends on 3) The control device for the internal combustion engine according to claim 3, wherein the knock control system is configured to calculate the KCS learned value for each of a plurality of operating regions of the internal combustion engine, and the electronic control unit is configured to store an update rule for each of the operating regions for updating the cooling parameter learned value for each of the operating regions based on the KCS learned value for each of the operating regions, and the electronic control unit is configured to update the cooling parameter learned value in every individual operating region according to the update rule for each of the operating regions. ### Claim 6 (depends on 1) The control device for the internal combustion engine according to claim 1, wherein the cooling parameter is a cooling medium temperature, the electronic control unit is configured to supply as the command value a target value of the cooling medium temperature to the cooling system such that as the KCS learned value increases, a correction amount of the target value of the cooling medium temperature increases in a low-temperature direction, and the cooling system is configured to control a cooling medium of the cooling system so as to realize the target value of the cooling medium temperature. ### Claim 7 (depends on 1) The control device for the internal combustion engine according to claim 1, wherein the cooling system includes an electric water pump capable of changing a discharge amount of a cooling medium, the cooling parameter is the discharge amount of the electric water pump, and the electronic control unit is configured to supply as the command value a target value of the discharge amount to the cooling system such that as the KCS learned value increases, a correction amount of the target value of the discharge amount increases in an amount increase direction. ### Claim 8 (depends on 1) The control device for the internal combustion engine according to claim 1, wherein the electronic control unit is configured to supply a target temperature to the first cooling system, the first cooling system is configured to control a cooling medium of the first cooling system so as to realize the target temperature of the first cooling system, and the electronic control unit is configured to decrease the target temperature of the first cooling system when the second cooling system has reached a limit of cooling. ### Claim 9 (depends on 8) The control device for the internal combustion engine according to claim 8, wherein the electronic control unit is configured to allow a decrease in the target temperature of the first cooling system only when a cooling medium temperature of the first cooling system is higher than a determination temperature. ### Claim 10 (depends on 8) The control device for the internal combustion engine according to claim 8, wherein the electronic control unit is configured to decrease the target temperature of the first cooling system based on the KCS learned value. ### Claim 11 A method for controlling an internal combustion engine, comprising: calculating a knock control system (KCS) learned value according to presence or absence of knocking of the internal combustion engine such that the KCS learned value is updated in an increase direction when the knocking occurs and is updated in a decrease direction when the knocking does not occur; calculating an ignition crank angle based on the KCS learned value, igniting a spark plug of the internal combustion engine at an ignition crank angle obtained by retarding the ignition crank angle in response to an occurrence of the knocking; supplying a command value corresponding to a target value of a cooling parameter to a cooling system of the internal combustion engine such that the cooling system performs cooling of the internal combustion engine according to the command value; and correcting the command value based on the KCS learned value such that as the KCS learned value increases, a correction amount for correcting the command value increases in correction amount in a direction in which a cooling capacity of the cooling system increases wherein the internal combustion engine includes a first cooling system that mainly cools a cylinder block of the internal combustion engine and a second cooling system that mainly cools a periphery of an intake port compared to the first cooling system, the first cooling system and the second cooling system respectively include cooling medium flow passages independent of each other, and the electronic control unit is configured to supply the command value to the second cooling system.