Abstract: A cooling apparatus of vehicle driving apparatuses of the invention controls flow of cooling water so as to cool engine cooling water by at least two radiators when a requested ability of cooling an internal combustion engine, is equal to or larger than a requested ability of cooling a hybrid device. The number of the radiators used for cooling the engine cooling water is larger than the number of the remaining radiator(s). The cooling apparatus controls the flow of the cooling water so as to cool device cooling water at least two radiators when the requested ability of cooling the hybrid device, is larger than the requested ability of cooling the internal combustion engine. The number of the radiators used for cooling the device cooling water is larger than the number of the remaining radiator(s).

Abstract: A cooling apparatus of vehicle driving apparatuses of the invention controls flow of cooling water so as to cool engine cooling water by at least two radiators when a requested ability of cooling an internal combustion engine, is equal to or larger than a requested ability of cooling a hybrid device. The number of the radiators used for cooling the engine cooling water is larger than the number of the remaining radiator(s). The cooling apparatus controls the flow of the cooling water so as to cool device cooling water at least two radiators when the requested ability of cooling the hybrid device, is larger than the requested ability of cooling the internal combustion engine. The number of the radiators used for cooling the device cooling water is larger than the number of the remaining radiator(s).

Abstract: An ECU avoids engine stall by putting a compressor into a stationary state in a case where the rotation speed of a crankshaft is equal to or less than a predetermined speed during an idle operation of an internal combustion engine. During the idle operation, the ECU calculates a total load torque applied to the crankshaft by the compressor and an alternator. The ECU calculates the maximum torque of the internal combustion engine during the idle operation based on a target speed during the idle operation. Then, the ECU raises the predetermined speed in a case where the value obtained by subtracting the load torque from the maximum torque is equal to or less than a predetermined value.

Abstract: The cooling apparatus of the engine according to the invention supplies the cooling water directly to the cylinder block water passage from the cylinder head water passage when the engine temperature is between first and second temperatures, and a supply of the cooling water to the heat exchanger is not requested. The first and second temperatures are lower than the engine completely-warmed temperature. The apparatus supplies the cooling water discharged from the cylinder block and head water passages, to the water passages through the heat exchanger when the engine temperature is between the second temperature and the engine completely-warmed temperature, and the supply of the cooling water to the heat exchanger is not requested.

Abstract: A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.

Abstract: A cooling system includes: a first coolant passage; a second coolant passage; a pump; a radiator; a third coolant passage; a connection switching mechanism that switches between a forward flow connection state and a reverse flow connection state; a fourth coolant passage; a fifth coolant passage; and a shutoff valve configured to open/shut off the fifth coolant passage. The radiator is disposed at a location at which coolant flowing from a second end of the first coolant passage into a fourth end of the second coolant passage is not cooled in the reverse flow connection state, and coolant flowing out from the second end of the first coolant passage and the fourth end of the second coolant passage is cooled in the forward flow connection state.

Abstract: A semiconductor substrate according to the present invention includes a nitride semiconductor layer 203, an amorphous semiconductor layer 205 formed on one main surface side of the nitride semiconductor layer 203, a high-roughness layer 206 which is a semiconductor layer formed on the amorphous semiconductor layer 205 and has a surface roughness larger than the amorphous semiconductor layer 205, and a diamond layer 207 formed on the high-roughness layer 206. Damage to the nitride semiconductor layer can be reduced in forming the diamond layer on the nitride semiconductor layer and adhesion between the layers can be increased.

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.

Abstract: An EGR cooler in the disclosure includes: a gas path configured to allow an EGR gas to flow; a refrigerant path configured to perform heat exchange between the EGR gas circulating along the gas path and a refrigerant; an exothermic body containing portion configured such that an exothermic body to generate heat by adsorbing a predetermined working gas is contained within the EGR cooler and at least a part of the exothermic body contacts with a wall surface of the gas path; a working gas tank in which the working gas is stored; and a gas moving apparatus configured to move the working gas stored in the working gas tank, from the working gas tank to the exothermic body containing portion.

Abstract: The cooling apparatus of the engine according to the invention supplies the cooling water directly to the cylinder block water passage from the cylinder head water passage when the engine temperature is between first and second temperatures, and a supply of the cooling water to the heat exchanger is not requested. The first and second temperatures are lower than the engine completely-warmed temperature. The apparatus supplies the cooling water discharged from the cylinder block and head water passages, to the water passages through the heat exchanger when the engine temperature is between the second temperature and the engine completely-warmed temperature, and the supply of the cooling water to the heat exchanger is not requested.

Abstract: An object is to provide a technology capable of suppressing a crack of a crystalline nitride layer which is generated due to a stress caused by difference in thermal expansion coefficients between a crystalline nitride and diamond. A semiconductor device includes a crystalline nitride layer, a structure containing silicon, and a diamond layer. The structure is disposed on a first main surface of the crystalline nitride layer. The diamond layer is disposed at least on a lateral portion of the structure and has a void between the diamond layer and the first main surface of the crystalline nitride layer. The void is a stress absorbing space, for example.

Abstract: In a semiconductor device including a crystalline nitride layer, in which diamond is used for heat dissipation thereof, it is an object of the present invention to suppress cracking of the crystalline nitride layer. The semiconductor device includes a layered body and a heat dissipation layer. The layered body includes a crystalline nitride layer and a composite layer. The composite layer includes a non-inhibiting portion which does not inhibit diamond growth on a surface thereof and an inhibiting portion which inhibits the diamond growth on the surface. A layered body main surface of the layered body has a first region in which the non-inhibiting portion is exposed and a second region in which the inhibiting portion is exposed. The heat dissipation layer is made of diamond, opposed to the main surface, adhered to the first region, and separated from the second region with a void interposed therebetween.

Abstract: A cooling apparatus of an internal combustion engine according to the invention controls an activation of a flow rate changing valve such that a block water flow rate proportion when an engine output is relatively large in a range of the engine output equal to or larger than a predetermine engine output, is larger than the block water flow rate proportion when the engine output is relatively small in the range of the engine output equal to or larger than a predetermine engine output.

Abstract: A vehicle heat management device includes a first circulator section, a second circulator section, and a flow rate change section. The first circulator section is provided at a first flow path of a first circulation path, and circulates a first heat exchange medium in the first circulation path, the first flow path passing a first heat exchanger, a second flow path passing a first expansion valve and a second heat exchanger, a third flow path passing a second expansion valve and a heat absorption section. The second circulator section circulates a second heat exchange medium in a second circulation path configured by a fourth flow path passing a heat generating body, a fifth flow path passing a radiator, and a sixth flow path passing a heat dissipating section and the first heat exchanger. The flow rate change section increases a flow rate of the second heat exchange medium.

Abstract: A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.

Abstract: The cooling apparatus of the engine sets the first shut-off valve to the closed position, sets the second shut-off valve to the open position, and performs the opposite flow connection operation to supplies the cooling water directly to the cylinder block water passage from the cylinder head water passage without flowing the cooling water through the radiator and to the heat exchanger from the cylinder head water block when the engine temperature is lower than the completely-warmed temperature, and the cooling water is requested to be supplied to the heat exchanger.

Abstract: A cooling system includes: a first coolant passage; a second coolant passage; a pump; a radiator; a third coolant passage; a connection switching mechanism that switches between a forward flow connection state and a reverse flow connection state; a fourth coolant passage; a fifth coolant passage; and a shutoff valve configured to open/shut off the fifth coolant passage. The radiator is disposed at a location at which coolant flowing from a second end of the first coolant passage into a fourth end of the second coolant passage is not cooled in the reverse flow connection state, and coolant flowing out from the second end of the first coolant passage and the fourth end of the second coolant passage is cooled in the forward flow connection state.

Abstract: An MBT ignition time and a knock ignition time are acquired from an engine rotation speed and engine load, and an ignition time on a delay angle side, out of these ignition times, is set as the most advance angle ignition time. An ignition time on the delay angle side only by the KCS learning value with respect to the most advance angle ignition time is set as a required ignition time, and when an actual ignition time set by a knock control system exceeds a predetermined amount and is positioned on the delay angle side with respect to the required ignition time, it is determined that abnormality occurs in an oil jet. Fail-safe processing to the effect that the opening degrees of a throttle valve are corrected to a closed side is executed in response to the abnormality determination.

Abstract: An ECU avoids engine stall by putting a compressor into a stationary state in a case where the rotation speed of a crankshaft is equal to or less than a predetermined speed during an idle operation of an internal combustion engine. During the idle operation, the ECU calculates a total load torque applied to the crankshaft by the compressor and an alternator. The ECU calculates the maximum torque of the internal combustion engine during the idle operation based on a target speed during the idle operation. Then, the ECU raises the predetermined speed in a case where the value obtained by subtracting the load torque from the maximum torque is equal to or less than a predetermined value.

Abstract: In a control device for an internal combustion engine, when a fuel-supply cutoff process ends and fuel injection restarts, an increase ratio based on which a base injection amount is increased is set such that the increase ratio when a duration of the fuel-supply cutoff process is long is higher than the increase ratio when a duration of the fuel-supply cutoff process is short. In addition, the increase ratio is decreased with a lapse of time after fuel injection restarts. Further, a decrease rate that is an amount by which the increase ratio is decreased within a prescribed period of time is set such that the decrease rate in the case where the duration of the fuel-supply cutoff process is long is higher than the decrease rate in the case where the duration of the fuel-supply cutoff process is short.