Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Aisin Seiki Kabushiki Kaisha

Ryo Michikawauchi

Yuji Miyoshi

Tomohiro Shinagawa

Kunihiko Hayashi

Hidefumi Aikawa

Yu Ofune

Yoshio Hasegawa

Yasushi Ito

Takuya Hirai

Yoichi Ogura

Masatoshi Yano

Yoshiharu Hirata

Hiroshi Watanabe

Hideo Kobayashi

Kenichi Yamada

Katuhiko Arisawa

Naoki Kato

Satoshi Ito

Toshihisa Sugiyama

Hiroyuki Sugihara

Kazuki Iwatani

Naoto Yumisashi

Shiro Tanno

Kenichi Kubota

Tatsuhito Matsumoto

Masanari Numata

A system includes: a low-temperature circuit having a chiller and in which a cooling water circulates therethrough; a heat dissipation unit for dissipating heat to an air; a refrigeration circuit in which a refrigerant circulates and for absorbing heat from the cooling water to the refrigerant at the chiller and dissipating heat from the refrigerant at the heat dissipation unit; a ratio adjusting device for adjusting a heat dissipation unit passing ratio; and a controller for controlling an heat transfer amount adjusting apparatus capable of adjusting the heat transfer amount in the refrigeration circuit and the ratio adjusting device. If it is predicted that the temperature of the cooling water decreases, the controller controls the apparatus so that the heat transfer amount is increased and controls the ratio adjusting device so that the ratio is decreased, before the temperature of the cooling water flowing through the chiller decreases.

In-vehicle temperature control system

A thermal management system includes a five-way valve configured to switch a first circuit mode in which a chiller and a battery are thermally connected and a second circuit mode in which the chiller and an LT radiator are thermally connected, and an ECU configured to control a compressor based on a chiller temperature and a radiator temperature. The ECU is configured to, in a case where switching between the first circuit mode and the second circuit mode is performed by controlling the five-way valve during a heating operation of a refrigeration cycle, control the compressor to reduce a temperature difference between the chiller temperature and the radiator temperature prior to the switching.

Thermal management system, vehicle including the same, and control method for thermal management circuit

A cooling apparatus of a vehicle driving system for driving a vehicle according to the invention activates a heat pump to cool a hybrid system by cooling medium and flows an engine cooling water in an engine water circulation passage through a condenser to cool the cooling medium by the engine cooling water at the condenser when an engine water circulation condition is satisfied. The engine water circulation condition is a condition that a heat pump activation condition is satisfied, and an engine cooling condition is not satisfied. The heat pump activation condition is a condition that a process of cooling the hybrid system by the cooling medium of the heat pump is requested. The engine cooling condition is a condition that a process of cooling an internal combustion engine by the engine cooling water is requested.

Cooling apparatus of vehicle driving system

A cooling apparatus of a vehicle driving system of the invention connects an engine water circulation passage to a hybrid system water circulation passage and flows cooling water in the engine water circulation passage and the hybrid system water circulation passage to cool a first hybrid system component by the cooling water cooled by an engine radiator and cool a second hybrid system component by the cooling water cooled by a hybrid system radiator when an engine cooling process is not requested, a first hybrid system cooling process is requested, a second hybrid system cooling process is requested, and a connection condition is satisfied. The connection condition is satisfied when the engine cooling process is not requested, and the cooling water flowing into the hybrid system water circulation passage from the engine water circulation passage, can cool the first hybrid system component.

A heat radiation amount from the cooling water in the radiator is adjusted so that the temperature of the cooling water is less than a prescribed temperature that is a temperature higher than the threshold value if a load exerted on the internal combustion engine is not less than a predetermined load, while the heat radiation amount from the cooling water in the radiator is adjusted so that the heat radiation amount from the cooling water in the radiator is increased if the load exerted on the internal combustion engine is less than the predetermined load as compared with if the load exerted on the internal combustion engine is not less than the predetermined load.

Cooling system for internal combustion engine

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.

Cooling apparatus of internal combustion engine

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.

A change in a valve opening degree from an opening degree (a) to an opening degree (d) is caused by a decrease in a radiator outlet water temperature, and at such time a flow rate through a radiator enters a boiling region. Therefore, when such entry is predicted, a target engine outlet water temperature is forcedly changed from 105&#xb0; C. to 100&#xb0; C. Thereupon, the valve opening degree is changed from the opening degree (a) to an opening degree (f). The flow rate through the radiator when the valve opening degree is the opening degree (f) is greater than the flow rate through the radiator when the valve opening degree is the opening degree (d), and furthermore, the flow rate through the radiator does not enter the boiling region while the valve opening degree is changing from the opening degree (a) to the opening degree (f).

Cooling apparatus for internal combustion engine

In order to shift a rotation angle of a rotor to a region of a normal mode (for example, a region c) from a region of a heater cut mode (for example, a region e), the rotation angle needs to pass through a region where a flow rate of a refrigerant which is caused to flow through all branch channels becomes zero (a region d). When the refrigerant has a high temperature, there is a possibility of the refrigerant being not cooled, and boiling. Therefore, when a request to switch a normal mode and a heater cut mode is issued, permission/non-permission of switch of the mode is determined by comparison of a temperature of the refrigerant detected by the temperature sensorand an upper limit temperature of the refrigerant.

Refrigerant circulation system

An oil pan structure () includes a lower structure () fixed to a lower portion of an engine block, a main oil pan () provided under an engine block with the lower structure being between the main oil pan and the engine block, a sub oil pan () that is provided in the main oil pan () and forms a first chamber () and a second chamber () inside the main oil pan (). The sub oil pan () is separated into an upper body () and a lower body (). The upper body () is formed together with the lower structure () by injection molding.

Oil pan structure

The control device of an internal combustion engine of the present invention is a control device of an internal combustion engine in which a bypass channel () for bypassing a throttle valve () of an engine intake system () via an evaporated fuel adsorption device is provided as a fuel emission path to an evaporated fuel adsorption device () for adsorbing evaporated fuel in a fuel tank (), and exhaust gas recirculation is implemented for recirculating exhaust gas via an exhaust gas recirculation passage () connected upstream of the entrance of the bypass channel of the engine intake system. An exhaust control valve () is disposed in the exhaust gas recirculation passage, intake control valves () are disposed in the bypass channel, and when the opening degree of the exhaust control valve is greater than a set opening degree, either the intake control valve is fully closed or the opening degree of the intake control valve is reduced in comparison with times when the opening degree of the exhaust control valve is equal to or less than the set opening degree.

Control device of internal combustion engine

An ammonia burning internal combustion engine can feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber. When the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the operating parameters of the internal combustion engine are controlled so the air-fuel mixture fed into the combustion chamber is made easier to burn. As a result, an ammonia burning internal combustion engine designed to suppress a drop in combustibility of auxiliary fuel due to ammonia, can be provided.

Ammonia burning internal combustion engine

An internal combustion engine suppressing trouble in a fuel feed system or lubrication system even when using ammonia as fuel. The internal combustion engine is able to be fed ammonia as fuel and is provided with a fuel tank storing ammonia in a liquid state, a fuel injector injecting ammonia in a gaseous state into a combustion chamber or intake port, and a fuel passage connected to the fuel tank and fuel injector. Inside the fuel tank or fuel passage, there is arranged a substance that can absorb or adsorb water and cannot absorb and adsorb ammonia.

Growing community of inventors

Numazu, Japan

Ryo Michikawauchi