Toyota Jidosha Kabushiki Kaisha

Eneos Corporation

Mahle Filter Systems Japan Corporation

Toyota Jidoshi Kabushiki Kaisha

Daisuke Tokozakura

Takahiro Shiina

Satoshi Tominaga

Kazuya Arakawa

Keisuke Ichige

Masanori Iritani

Yushi Seki

Masao Watanabe

Akira Murakami

Hideyuki Suzuki

Masaaki Katayama

Naoyuki Kishimoto

Yuya Takahashi

Yasuaki Kodama

Hitoshi Takayama

Takatoshi Shinyoshi

Tomoharu Kataoka

Yohei Susukida

Takahiro Fukumizu

Hiroyuki Shibata

Hiroyuki Nishizawa

Masafumi Yamamoto

Shuji Moriyama

Hideki Kubonoya

Daisuke Tomomatsu

Katsuhiro Isoda

Yuki Iwama

Naoki Ooi

Yasusi Hirano

A cooling system includes a first cooling passage in which a first cooling object is cooled by first coolant, a flow passage that supplies the first coolant to a second cooling object from the first cooling passage, a flow rate regulation mechanism that regulates a flow rate of the first coolant flowing in the first cooling passage, and a controller that controls the flow rate regulation mechanism. The controller controls the flow rate regulation mechanism so that the flow rate of the first coolant flowing in the first cooling passage is lower when temperature of the first cooling object is lower than temperature of the first coolant, than the flow rate when the temperature of the first cooling object is equal to or higher than the temperature of the first coolant.

Cooling system with flow rate regulation

A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 4.0 to 20.0 mm/s, and a kinematic viscosity at 100° C. of 1.8 to 5.2 mm/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein Rand Rare each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein Ris a C2-17 linear chain hydrocarbon group, and Ris a C2-17 linear chain hydrocarbon group.

Lubricating oil composition

A seal structure of a drive device is provided which includes a case in which a motor chamber for accommodating an electric motor and a gear chamber for accommodating a gear mechanism are located adjacent to each other, a partition that separates the motor chamber and the gear chamber, a bearing that supports a rotating shaft, a seal part that seals between the rotating shaft and the partition, a lubricating oil that lubricates the gear mechanism, and a coolant that cools the electric motor, and also includes a first bearing on the motor chamber side, a second bearing on the gear chamber side, a first seal part on the motor chamber side, a second seal part on the gear chamber side, and at least the second seal part of the first seal part and the second seal part is provided between the first bearing and the second bearing.

Seal structure of drive device

This disclosure provides a nonaqueous coolant composition excellent in insulation property, heat transfer characteristic, and hydrolysis resistance. The embodiment is a coolant composition that includes at least one ketone compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.

Coolant composition and cooling system

A cooling device for a vehicle, includes a cooling circuit including a first circuit in which a cooling liquid circulates through a power control unit and a second circuit connected in parallel with the first circuit and in which the cooling liquid circulates through a battery without passing through the power control unit; and a flow-rate control unit that controls a proportion of a flow rate of the cooling liquid between the first circuit and the second circuit, and when the battery is being charged with the electric power of the external power supply, the control unit controls so that the flow rate of the cooling liquid flowing through the second circuit is greater than the flow rate of the cooling liquid flowing through the first circuit on a side of the power control unit.

Cooling device for vehicle

This disclosure provides a nonaqueous coolant composition that is excellent in insulation property and heat resistance and has improved heat transfer characteristics. The embodiment is a coolant composition that includes at least one ether compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.

A battery cooling system includes: a cooling circuit; a power transmission device disposed in the cooling circuit, the power transmission device including a gear; a drivetrain oil having an electric insulating property and being used for lubrication of the gear, the drivetrain oil circulating in the cooling circuit; a battery unit disposed in the cooling circuit, the battery unit including a module case that houses a plurality of battery cells; a pump disposed in the cooling circuit; and a radiator disposed in the cooling circuit, the radiator releasing heat from the drivetrain oil flowing in the cooling circuit. The drivetrain oil performs direct heat exchange inside the power transmission device and flows through an inside of the module case and performs direct heat exchange with the battery cells.

Battery cooling system

A cooling system for a powertrain includes: a rotating electrical machine unit including a rotating electrical machine; and a power control unit configured to drive the rotating electrical machine. The cooling system includes: a radiator configured to cool a refrigerant; a refrigerant circulation circuit configured to supply the refrigerant flowing out from the radiator to a second cooled portion via a first cooled portion; a bypass flow path bypassing the second cooled portion; a flow control valve configured to adjust the ratio of a second refrigerant flow rate to a first refrigerant flow rate; and a control device configured to control the flow control valve. The control mode of the flow control valve includes a flow rate limiting mode in which the flow control valve is controlled to adjust the ratio such that the second refrigerant flow rate becomes less than the first refrigerant flow rate.

Control system

A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40&#xb0; C. of 4.0 to 20.0 mm/s, and a kinematic viscosity at 100&#xb0; C. of 1.8 to 5.2 mm/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein Rand Rare each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein Ris a C2-17 linear chain hydrocarbon group, and Ris a C2-17 linear chain hydrocarbon group.

There are provided in-wheel motors lubricated with an oil; a cooling medium circuit in which a cooling medium flows; a cooling device cooling the cooling medium; heat exchangers carrying out heat exchange between the cooling medium and the oil after lubricating the in-wheel motors; and at least one of a controller including an inverter and a battery that can be cooled by the cooling medium flowing through the cooling medium circuit, and the cooling medium circuit has such a configuration that circulates the cooling medium through the cooling device, at least one of the controller and the battery, and the heat exchangers in turn.

Vehicle

A heat exchange system for a vehicle including a battery, an electric motor, and a transmission system is provided. The heat exchange system includes a heat pump, and a heat exchanger. The heat pump is used for air conditioning. The heat pump includes an electric compressor that compresses a refrigerant. The electric compressor is configured to be driven with electric power from the battery. The heat exchanger is configured to exchange heat between the refrigerant and lubricating oil that lubricates the transmission system.

Heat exchange system for vehicle

A coolant passage of a vehicular cooling system includes a battery coolant passage through which a coolant is supplied from a radiator to a battery, a discharge coolant passage through which the coolant is supplied to the radiator, a first bypass passage through which the coolant is supplied from the discharge coolant passage to the battery coolant passage while bypassing the radiator, and a switching valve that switches a pathway of the coolant, between a first pathway through which the coolant is supplied from the discharge coolant passage to the battery coolant passage via the radiator and a second pathway through which the coolant is supplied from the discharge coolant passage to the battery coolant passage via the first bypass passage. An electronic control unit controls the switching valve such that the pathway is switched to the second pathway at the time of increasing a temperature of the battery.

Vehicular cooling system

A heat exchanger for a vehicle is mounted in a vehicle having a power train through which an engine coolant, an engine oil and a transmission oil flow and in which a flow rate of the engine oil and a flow rate of the transmission oil are different from each other. A first flow passage for causing the engine coolant to flow, a second flow passage for causing the engine oil to flow, and a third flow passage for causing the transmission oil to flow are formed through lamination of a plurality of plates. The heat exchanger includes a region where the first flow passage is adjacent only to that one of the second flow passage and the third flow passage through which a fluid flows at lower flow rate.

Heat exchanger for vehicle

A power train includes: an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.

Power train

A cooling apparatus for a hybrid vehicle is provided with an oil circulating circuit supplying oil discharged from an electric oil pump to a first motor, a second motor, an inverter, and a lubrication-required part, and the oil circulating circuit includes: a first circuit supplying the oil that is discharged from the electric oil pump, and is cooled by an HV radiator to the inverter, the first motor, and the second motor; and a second circuit supplying the oil that is discharged from the electric oil pump without being cooled by the HV radiator to the lubrication-required part.

Growing community of inventors

Susono, Japan

Daisuke Tokozakura