Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Aisin Aw Co., Ltd.

Nippon Soken, Inc.

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Takashi Yamada

Hiroyuki Imanishi

Mitsuhiro Nada

Tsuyoshi Maruo

Yohei Okamoto

Shingo Hashimoto

Atsushi Watanabe

Keigo Suematsu

Yuji Ishikawa

Ikuyasu Kato

Yoshiyuki Kawasaki

Hiroyuki Suzuki

Takashi Yamamoto

Yoshiaki Naganuma

Masashi Toida

Kiyotaka Koga

Tetsuya Bono

Kazuo Ishikawa

Yuichi Sakajo

Takaki Ogawa

Masakatsu Suzuki

Manabu Kitamura

Hikohito Yamazaki

Yoshihiko Hiya

Shinichiro Hirayama

Ayuki Koishi

Kitamura Manabu

Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicleincluding an external power-feeding device, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cellor a failure of a driving device to supply fuel to the fuel celloccurs during external power feeding, warning is issued to outside of the vehiclebefore the fuel cellstops power generation.

Method for controlling fuel cell vehicles and fuel cell vehicles

A switching circuit may include first and second switching elements that are connected in parallel with each other. A controller may be configured to selectively perform either a first switching control to drive the first switching element or a second switching control to drive the second switching element. The first switching element may be constituted mainly of a first semiconductor material, and the second switching element may be constituted mainly of a second semiconductor material having a narrower band gap than the first semiconductor material. The second switching element may be larger in size than the first switching element. The controller may be configured to switch to the second switching control when an instruction value and/or an actual value of the current exceeds a predetermined threshold value while performing the first switching control.

Power converter

An insulated wire has a conductor, and an insulating film including a first insulating layer covering the conductor and a second insulating layer covering the first insulating layer. The second insulating layer contains a polyimide or a polyamideimide as a main component. The first insulating layer contains a reaction product of a carboxylic acid dianhydride and a diamine as an adhesive component and a component that is the same as the main component in the second insulating layer. At least one of the carboxylic acid dianhydride and the diamine has a carbonyl group.

Insulated wire

Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel cell stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicleincluding an external power-feeding device, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cellor a failure of a driving device to supply fuel to the fuel celloccurs during external power feeding, warning is issued to outside of the vehiclebefore the fuel cellstops power generation.

The present invention is to prevent the temperature of an electric heater from being higher than or equal to a temperature at which control to reduce power consumption is started to prevent an abrupt decrease in the power consumption of the electric heater in order to secure a power consuming destination of a fuel cell. A fuel cell systemincludes: a fuel cellthat receives the supply of reactant gas to generate power; a fuel cell cooling systemfor circulating a coolant through the fuel cellto cool the fuel cell; an electric heateroperated to consume power of the fuel celland driven to decrease power consumption abruptly at a temperature lower than a decomposition temperature of the coolant; and a heater cooling systemfor circulating the coolant around the electric heaterto cool the electric heater. In a control method therefor, when the temperature of the coolant in the heater cooling systemfalls within a temperature range where the power consumption of the electric heaterchanges abruptly, the coolant is circulated from the fuel cell cooling systeminto the heater cooling systemto cool the electric heater

Fuel cell system and control method for fuel cell system

A fuel cell system comprises: a fuel cell; a cooling system circuit including a cooling liquid supply path configured to supply a cooling liquid to the fuel cell, a radiator configured to cool down the cooling liquid, a radiator fan, and a cooling liquid pump provided in the cooling liquid supply path to feed the cooling liquid to the fuel cell; a controller; and a speedometer configured to obtain a speed of the fuel cell vehicle, wherein the controller is capable of performing a first cooling control that sets an upper limit value of driving amount of the radiator fan according to the speed of the fuel cell vehicle and regulates a flow rate of the cooling liquid pump or the driving amount of the radiator fan under the upper limit value of the driving amount of the radiator, so as to cool down the fuel cell.

Fuel cell system, fuel cell vehicle and control method of fuel cell system

A fuel cell system comprises: a fuel cell; a cooling liquid supply flow path for supplying cooling liquid to the fuel cell; a radiator for cooling the cooling liquid; a first temperature sensor, provided at an outlet of the radiator, for measuring a temperature of the cooling liquid; an ambient temperature sensor; and a controller. The controller executes: estimating a temperature of the cooling liquid inside the cooling liquid supply flow path based on an ambient temperature measured by the ambient temperature sensor; acquiring a temperature of the cooling liquid inside the cooling liquid supply flow path based on the temperature measured by the first temperature sensor after it is determined that the cooling liquid within the radiator has reached the first temperature sensor; and adjusting a flow rate of the cooling liquid based on the estimated temperature or the acquired temperature of the cooling liquid.

Fuel cell system, fuel cell mountable vehicle and method of controlling fuel cell system

An object is to suppress drying of a fuel cell during continuous operation with high load. There is provided a fuel cell system including a fuel cell. The fuel cell system comprises an impedance detector that is configured to detect an impedance of the fuel cell; and a current limiter that is configured to limit an output current of the fuel cell with a limiting rate. The current limiter changes the limiting rate, based on the detected impedance.

Fuel cell system and control method thereof

A fuel cell cooling system includes an air temperature estimating unit, an air temperature sensor and an abnormality determining unit. The air temperature sensor senses an air detection temperature of the air that flows out of the air cooler and is supplied to the fuel cell. The air temperature estimating unit estimates an air estimation temperature of the air, based on a temperature of a refrigerant flowing into the air cooler, a power supply quantity of a power supplied to the circulation pump, a temperature of the air flowing into the air cooler and a flow volume of the air. The abnormality determining unit determines that a circulation flow volume of the refrigerant is in an abnormal state when the air detection temperature is higher than the air estimation temperature by a value greater than or equal to a predetermined value.

Fuel cell cooling system

A fuel cell system includes a control unit configured to perform air-conditioning-system preparation control, wherein, under the air-conditioning-system preparation control, when an air conditioning system is not requested to heat air, it is determined whether or not a coolant within a coolant circulation passage is capable of being supplied to an air conditioning circuit, when the coolant within the coolant circulation passage is not capable of being supplied to the air conditioning circuit, the heater is operated to maintain a first predetermined temperature or higher of the coolant within the air conditioning circuit, and when the coolant within the coolant circulation passage is capable of being supplied to the air conditioning circuit, the air-conditioning water pump is operated to draw the coolant from the coolant circulation passage into the air conditioning circuit and to maintain the first predetermined temperature or higher of the coolant within the air conditioning circuit.

Fuel cell system

A flow control valvecan adjust the percentage of the flow rate of cooling water to a radiatorto a predetermined value (50%) or smaller. When the temperature of the cooling water in a fuel cellis determined to be a predetermined temperature (0&#xb0; C.) or higher after the cooling water is supplied to the fuel cellwith the percentage of the flow rate of the cooling water to the radiatorset to the predetermined value (50%) or larger, a controllerperforms a predetermined percentage supply operation for controlling the flow control valveand a pumpto supply the cooling water to the fuel cellwith the percentage of the flow rate of the cooling water to the radiatorset to the predetermined value (50%) or larger.

A fuel cell system includes: a fuel cell; a coolant circulation passage; a radiator; a water pump; a flow dividing valve; a fan; and a controller that, when a first prescribed period elapses in a state where a temperature of a coolant is equal to or more than a first prescribed temperature and an opening degree of the flow dividing valve makes the flow rate of the coolant flowing into the radiator equal to or more than a prescribed flow rate, gives a priority to the rise in a driving voltage of the fan over the increase in a flow rate by the water pump, and when a second prescribed period elapses in a state where the temperature of the coolant is equal to or more than a second prescribed temperature after the driving voltage of the fan is raised, increases the flow rate by the water pump.

An object is to perform a purge at an appropriate timing. There is provided a fuel cell system mounted on a vehicle. The fuel cell system comprises a gas supplier that is configured to supply a purge gas into a fuel cell; and a controller that is configured to control the gas supplier and perform a purge with the purge as at a stop time of the vehicle. The controller obtains an ambient temperature in a driving state of the vehicle a plurality of times. In a case where an ambient temperature obtained last time among the ambient temperatures obtained in the driving state is lower than a predetermined reference value, the controller performs the purge with enhancing a purging capacity, compared with a case where the ambient temperature obtained last time is higher than the predetermined reference value.

When an actual output value is less than an output command value, a current command value is increased. When the actual output value is equal to or greater than the output command value, whether the actual output value is within a range of a dead band is determined. When the actual output value is outside the range of the dead band, the current command value is decreased. When the actual output value is within the range of the dead band, the current command value is maintained.

There is provided a technique to suppress water from remaining in a fuel cell and auxiliary machines after a stop of operation of a fuel cell system. A fuel cell systemincludes a controller, a fuel cell, a cathode gas supply discharge systemand an anode gas supply discharge circulation system. The controllerserves as a termination process controllerto control a termination process that is performed when operation of the fuel cellis to be stopped. In the termination process, the termination process controllerperforms a quick warm-up operation to quickly increase the temperature of the fuel cell, subsequently performs a standard warm-up operation that has a lower temperature rise rate of the fuel cellthan that in the quick warm-up operation, and then performs a purging process to purge the fuel cell

Growing community of inventors

Hekinan, Japan

Takashi Yamada