# US 10,865,694 B2 · Cooling apparatus of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,694 B2 - Document ID: US10865694B2 - Status: Granted - Kind: B2 - Application number: 16/154,851 - Filed: 2018-10-09 - Published: 2019-08-01 - Granted: 2020-12-15 - Earliest claimed: 2018-01-26 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Hiroyuki Sugihara; Tomohiro Shinagawa; Yuji Miyoshi; Takuya Hirai; Keisuke Tokai - Web page: https://patentgrep.com/patent/US10865694B2 ## CPC - F01P 7/14: the coolant being liquid - B60K 6/22: characterised by apparatus, components or means specially adapted for HEVs - B60K 11/02: with liquid cooling - B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors} - B60L 1/02: to electric heating circuits - B60L 50/16: with provision for separate direct mechanical propulsion - B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75) - B60L 58/26: by cooling - F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) - F01P 7/165: {characterised by systems with two or more loops} - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings - H01M 10/667: the system being an electronic component, e.g. a CPU, an inverter or a capacitor - B60L 2240/36: Temperature of vehicle components or parts - B60L 2240/445: Temperature - B60Y 2200/92: Hybrid vehicles - B60Y 2306/05: Cooling - F01P 2023/08: Microprocessor; Microcomputer - F01P 2025/30: Engine incoming fluid temperature - F01P 2050/24: Hybrid vehicles - F01P 2060/00: Cooling circuits using auxiliaries - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - 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) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A cooling apparatus of a vehicle of the invention comprises an engine cooling system, a device cooling system, and a connection apparatus configured to connect an engine circulation circuit of the engine cooling system and a device circulation circuit of the device cooling system to each other such that heat exchanging liquid cooled by a device radiator of the device cooling system, is supplied to an engine passage formed in an internal combustion engine without flowing through a device passage formed in the device including at least one of a motor of the vehicle, a battery for storing electric power to be supplied to the motor, and a power control unit for controlling a supply of the electric power from the battery to the motor. ## Claims ### Claim 1 A cooling apparatus of a vehicle comprising: an engine cooling system including an engine circulation circuit, in which a heat exchanging liquid for cooling an internal combustion engine of the vehicle flows, an engine pump provided in the engine circulation circuit, and an engine radiator provided in the engine circulation circuit for cooling the heat exchanging liquid, the engine circulation circuit including an engine passage formed in the internal combustion engine; a device cooling system including a device circulation circuit, in which the heat exchanging liquid for cooling a device of the vehicle flows, a device pump provided in the device circulation circuit, and a device radiator provided in the device circulation circuit for cooling the heat exchanging liquid, the device circulation circuit including a device passage formed in the device, the device including at least one of a motor of the vehicle, a battery for storing electric power to be supplied to the motor, and a power control unit for controlling a supply of the electric power from the battery to the motor; and a connection apparatus that connects the engine circulation circuit and the device circulation circuit to each other, wherein the connection apparatus is configured to connect the engine circulation circuit and the device circulation circuit to each other such that the heat exchanging liquid cooled by the device radiator is supplied to the engine passage without flowing through the device passage, wherein the cooling apparatus further comprises an electronic control unit for controlling activations of the engine pump, the device pump, and the connection apparatus, and the electronic control unit is configured to activate the connection apparatus to connect the engine circulation circuit and the device circulation circuit to each other and activate at least one of the engine pump and the device pump when a temperature of the internal combustion engine is higher than a predetermined upper limit engine temperature while the internal combustion engine is requested to be cooled, and the device is not requested to be cooled. ### Claim 2 (depends on 1) The cooling apparatus of the vehicle as set forth in claim 1, wherein the device circulation circuit includes a device radiator passage, through which the heat exchanging liquid flows, formed in the device radiator, a first device circulation passage which connects a first opening of the device passage to a first opening of the device radiator passage, and a second device circulation passage which connects a second opening of the device radiator passage to a second opening of the device passage, and the connection apparatus includes a first connection passage which connects the engine circulation circuit to the first device circulation passage, a second connection passage which connects the engine circulation circuit to the second device circulation passage, and a control valve for shutting off a flow of the heat exchanging liquid between the device passage and the device radiator passage through at least one of the first device circulation passage and the second device circulation passage. ### Claim 3 (depends on 1) The cooling apparatus of the vehicle as set forth in claim 1, wherein the connection apparatus is configured to connect the engine circulation circuit and the device circulation circuit to each other such that the heat exchanging liquid flows through the engine radiator and the device radiator in parallel. ### Claim 4 (depends on 1) The cooling apparatus of the vehicle as set forth in claim 1, wherein the electronic control unit is configured to activate the connection apparatus to disconnect the engine circulation circuit from the device circulation circuit and activate the engine pump and the device pump when the internal combustion engine is requested to be cooled, and the device is requested to be cooled. ### Claim 5 (depends on 1) The cooling apparatus of the vehicle as set forth in claim 1, wherein the electronic control unit is configured to control the activation of an activated pump of the engine pump and the device pump so as to increase a flow rate of the heat exchanging liquid discharged from the activated pump when a temperature of the heat exchanging liquid flowing out from the engine passage is higher than a predetermined engine flow-out liquid temperature while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates at least one of the engine pump and the device pump. ### Claim 6 (depends on 5) The cooling apparatus of the vehicle as set forth in claim 5, wherein the electronic control unit is configured to control the activation of the activated pump so as to increase the flow rate of the heat exchanging liquid flowing out from the activated pump when an engine flow-in liquid temperature, which is a temperature of the heat exchanging liquid flowing into the engine passage, is lower than a predetermined engine flow-in liquid temperature, and a difference of the engine flow-in liquid temperature with respect to the predetermined engine flow-in liquid temperature is larger than a predetermined engine flow-in liquid temperature difference while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates at least one of the engine pump and the device pump. ### Claim 7 (depends on 6) The cooling apparatus of the vehicle as set forth in claim 6, wherein the electronic control unit is configured to control the activation of the activated pump so as to maintain the flow rate of the heat exchanging liquid flowing out from the activated pump when the engine flow-in liquid temperature is lower than the predetermined engine flow-in liquid temperature, and the difference of the engine flow-in liquid temperature with respect to the predetermined engine flow-in liquid temperature is equal to or smaller than the predetermined engine flow-in liquid temperature difference while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates at least one of the engine pump and the device pump. ### Claim 8 A cooling apparatus of a vehicle comprising: an engine cooling system including an engine circulation circuit, in which a heat exchanging liquid for cooling an internal combustion engine of the vehicle flows, an engine pump provided in the engine circulation circuit, and an engine radiator provided in the engine circulation circuit for cooling the heat exchanging liquid, the engine circulation circuit including an engine passage formed in the internal combustion engine; a device cooling system including a device circulation circuit, in which the heat exchanging liquid for cooling a device of the vehicle flows, a device pump provided in the device circulation circuit, and a device radiator provided in the device circulation circuit for cooling the heat exchanging liquid, the device circulation circuit including a device passage formed in the device, the device including at least one of a motor of the vehicle, a battery for storing electric power to be supplied to the motor, and a power control unit for controlling a supply of the electric power from the battery to the motor; a connection apparatus that connects the engine circulation circuit and the device circulation circuit to each other, wherein the connection apparatus is configured to connect the engine circulation circuit and the device circulation circuit to each other such that the heat exchanging liquid cooled by the device radiator is supplied to the engine passage without flowing through the device passage; and an electronic control unit for controlling activations of the engine pump, the device pump, and the connection apparatus, and the electronic control unit is configured to: activate the connection apparatus to connect the engine circulation circuit and the device circulation circuit to each other and activate both of the engine pump and the device pump when the temperature of the internal combustion engine is higher than the predetermined upper limit engine temperature while the internal combustion engine is requested to be cooled, and the device is not requested to be cooled; control the activations of the engine pump and the device pump so as to decrease a flow rate of the heat exchanging liquid discharged from the engine pump and increase a flow rate of the heat exchanging liquid discharged from the device pump when an engine radiator flow-out liquid temperature, which is a temperature of the heat exchanging liquid flowing out from the engine radiator, is higher than a device radiator flow-out liquid temperature, which is a temperature of the heat exchanging liquid flowing out from the device radiator, and a radiator flow-out liquid temperature difference, which is a difference of the engine radiator flow-out liquid temperature with respect to the device radiator flow-out liquid temperature, is larger than a predetermined radiator flow-out liquid temperature difference while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates both of the engine pump and the device pump; control the activations of the engine pump and the device pump so as to increase the flow rate of the heat exchanging liquid discharged from the engine pump and decrease the flow rate of the heat exchanging liquid discharged from the device pump when the engine radiator flow-out liquid temperature is higher than the device radiator flow-out liquid temperature, and the radiator flow-out liquid temperature difference is equal to or smaller than the predetermined radiator flow-out liquid temperature difference while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates both of the engine pump and the device pump; and control the activations of the engine pump and the device pump so as to increase the flow rate of the heat exchanging liquid discharged from the engine pump and decrease the flow rate of the heat exchanging liquid discharged from the device pump when the engine radiator flow-out liquid temperature is equal to or lower than the device radiator flow-out liquid temperature while the electronic control unit connects the engine circulation circuit and the device circulation circuit to each other and activates both of the engine pump and the device pump.