Abstract: When the rotation speed is zero, the current value is specified to monotonically increase with an increase in depression amount of an accelerator pedal in a range of a depression amount from 0% to a predetermined amount P2. The current value is fixed to a limit value Ith irrespective of the depression amount in a range of the depression amount from the predetermined amount P2 to 100%.

Abstract: A fuel cell system comprising: a power generation controller that controls a value subject to control, which is a value exhibiting a power generating state by a fuel cell and is a value that is affected by alternating current applied to the fuel cell, to approach a target value; a dead zone setter that sets a dead zone with the target value as a reference; and, a stopper that stops the control by the power generation controller when the value subject to control is contained in the dead zone.

Abstract: A vehicle includes: a fuel cell that receives supply of fuel gas and generates electric power; a motor that is driven by the generated electric power of the fuel cell; an electric power consuming auxiliary machine; a mechanical brake; a secondary cell, and a deceleration control unit. The deceleration control unit limits the regenerative braking force to be obtained by the regenerative control, to an upper limit regenerative braking force corresponding to the maximum consumed electric power that the electric power consuming auxiliary machine is capable of consuming such that regenerative electric power associated with regenerative braking is consumed by the electric power consuming auxiliary machine, and when the electric power consuming auxiliary machine is incapable of consuming the regenerative electric power to the maximum consumed electric power, the residual regenerative electric power is consumed by charge of the secondary cell.

Abstract: A fuel cell system installed in a vehicle includes a fuel cell that supplies power to a motor that drives the vehicle, a pump that supplies oxygen to the fuel cell, an accelerator position detector that detects an accelerator depression amount of the vehicle, and a controller that calculates required generated power of the fuel cell and required driving power of the pump, based on the accelerator depression amount. When a preset condition of causing a sharp drop in the calculated required generated power is satisfied, the controller calculates the required driving power in such a manner that a drop rate of the required driving power becomes higher than a drop rate of the calculated required generated power, sets a lower limit to the calculated required driving power, and drives the pump in accordance with the lower limit when the required driving power is lower than the lower limit.

Abstract: 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.

Abstract: A fuel cell system mounted in a vehicle includes a fuel cell supplying electric power to a motor driving the vehicle, a pump supplying oxygen to the fuel cell, an accelerator position detection unit detecting an accelerator depression amount of the vehicle, and a control unit calculating electric power required to be generated by the fuel cell and electric power required for driving of the pump based on the accelerator depression amount and controlling the pump based on the electric power required for the driving, in which the control unit calculates the electric power required for the driving such that a rate of increase in the electric power required for the driving exceeds a rate of increase in the electric power required to be generated when the calculated electric power required to be generated increases.

Abstract: An object is to provide a technique of reducing a potential failure to start a fuel cell system due to a temperature decrease in a vehicle with the fuel cell system mounted thereon. There is provided a vehicle that comprises a fuel cell system, a battery, a motor, and a determiner configured to determine that the fuel cell system has a frozen part when temperature measured by a temperature measurement unit is equal to or lower than a predetermined first temperature and at least one of conditions (1) to (3) is satisfied: (1) no purging process is performed after a change from an on state of the vehicle to an off state of the vehicle; (2) ambient temperature decreases to or below a predetermined second temperature in the off state of the vehicle and no purging process is performed; and (3) an inclination of the vehicle is equal to or greater than a predetermined inclination at a time of change from the off state of the vehicle to the on state of the vehicle.

Abstract: A fuel cell system, comprising: a compressor that is placed in a supply flow path arranged to supply a cathode gas to a fuel cell; a first motor-operated valve that is placed between the fuel cell and the compressor in the supply flow path; a first stepping motor that is provided in the first motor-operated valve; a second motor-operated valve that is placed in a discharge flow path arranged to discharge the cathode gas from the fuel cell; a second stepping motor that is provided in the second motor-operated valve; and a controller that is configured to control power generation by the fuel cell and to input drive pulses into the first stepping motor and the second stepping motor, so as to open the first motor-operated valve and the second motor-operated valve at a start of the fuel cell and close the first motor-operated valve and the second motor-operated valve at a stop of the fuel cell, wherein the first stepping motor is driven by input of the drive pulse to generate a torque to open and close the first m

Abstract: There is provided a method of controlling a fuel cell system comprising a fuel cell, a tank that is configured to store a fuel gas filled through a filler port of fuel gas provided in an outer plate of a vehicle, and a main stop valve that is configured to change over between opening and closing to open and close a fuel passage arranged from the tank to the fuel cell. The method comprises controlling the main stop valve to change over from opening to closing in response to detection of an operation for gas filling to fill the fuel gas into the tank, when a control accompanied with opening of the main stop valve is performed during a stop of the vehicle.

Abstract: A vehicle which includes a fuel cell, a receptacle, a lid, and a fixing pin, and which stores a detection of the open state during a period from a time point of a latest end of operation of the vehicle to a time point of input acceptance of a start-up instruction. If a detection of an open state has been stored in a memory at a time point of input acceptance of a start-up instruction, then the vehicle executes a retry operation of temporarily moving the fixing pin of the fixed position to the released position and thereafter moving the fixing pin again to the fixed position during an operating period of the vehicle from the time point of input acceptance of the start-up instruction.

Abstract: In a vehicle including a fuel cell system, an electronic control unit is configured to perform first processing in which a rotation speed of an air pump is controlled based on a torque command value and a rotation speed command value, and to perform, in the first processing, at least one of second processing in which the torque command value is set to be larger than the calculated torque command value when at least one of values of an accelerator position, required electric power, and the rotation speed command value or a change rate thereof is increased by a prescribed first value or more, and third processing in which the torque command value is set to be smaller than the calculated torque command value when at least one of the values or the change rate thereof is decreased by a prescribed second value or more.

Abstract: A valve control apparatus controls a valve for adjusting a pressure of a reaction gas supplied to a fuel cell. The valve control apparatus includes: an estimation portion that estimates a valve effective cross-sectional area of the valve; and an opening adjustment portion that adjusts opening degree of the valve with control amount corrected based on the valve effective cross-sectional area estimated by the estimation portion.

Abstract: A fuel cell system to be installed on a vehicle includes a fuel cell, a secondary battery, an SOC detector that detects a temperature and a state of charge of the secondary battery, an accelerator position detector that detects an accelerator depressed amount, and a controller that controls power to be generated by the fuel cell. The controller includes: a required generation power calculator that calculates required generation power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery; and a maximum required power calculator that calculates maximum required power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery. The maximum required power includes allowable charging power correlated with a maximum value of charging power.

Abstract: A braking force (BF) control system includes: a first required BF calculator that calculates, based on a position of the brake pedal, a first required friction BF allocated to the friction brake and a first required regenerative BF allocated to regenerative control of the drive motor; a second required BF calculator that calculates, based on a position of the acceleration pedal, a second required friction BF allocated to the friction brake and a second required regenerative BF allocated to the regenerative control; a regenerative total BF calculation/execution portion that calculates a regenerative total BF based on the first and second required regenerative BFs and performs the regenerative control based on the regenerative total BF; and a friction total BF calculation/execution portion that calculates a friction total BF based on the first and second required friction BFs and controls the friction brake based on the friction total BF.

Abstract: A fuel cell system mounted on a vehicle, includes: a tank that stores a reactive gas which is to be supplied to a fuel cell; a filling port that fills the reactive gas into the tank and is connected with a supply tube that supplies the reactive gas; a lid that closes the filling port; an open-close sensor that detects open/closed position of the lid; a recorder unit that records a travel history which indicates the fact that the vehicle moves; and a controller unit that controls the vehicle. Upon satisfaction of conditions that the vehicle is in a drivable state, that the recorder unit has no travel history since activation of the fuel cell system and that the open/closed position of the lid detected by the open-close sensor indicates an open position, the controller unit sets the vehicle to a non-drivable state.

Abstract: A fuel cell system to be installed on a vehicle includes a fuel cell, a secondary battery, an SOC detector that detects a temperature and a state of charge of the secondary battery, an accelerator position detector that detects an accelerator depressed amount, and a controller that controls power to be generated by the fuel cell. The controller includes: a required generation power calculator that calculates required generation power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery; and a maximum required power calculator that calculates maximum required power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery. The maximum required power includes allowable charging power correlated with a maximum value of charging power.

Abstract: There is provided a control method of a flow regulating valve of an oxidizing gas in a fuel cell. In a load disconnected state that the fuel cell is electrically disconnected from a load, the control method gradually opens the flow regulating valve that is configured to supply the oxidizing gas to a cathode of the fuel cell by a predetermined valve opening each time from a full-close position or gradually closes the flow regulating valve by a predetermined valve opening each time from a full-open position, so as to gradually change a supply amount of the oxidizing gas introduced to the cathode and cause hydrogen transmitted from an anode to the cathode in the fuel cell to be oxidized.

Abstract: A vehicle driven by an electric motor, includes: an accelerator operation amount detection unit that detects an accelerator operation amount; a speed detection unit that detects a vehicle speed; and a control unit configured to calculate a required torque of the electric motor on a basis of the accelerator operation amount and the vehicle speed, calculate a torque increase rate, which is a required rate at which an effective torque for driving the electric motor is increased, on a basis of the required torque, and control the electric motor on a basis of the calculated torque increase rate. The control unit is configured to control the electric motor to operate at a predetermined torque increase rate until the effective torque reaches a predetermined threshold torque, and to reduce the torque increase rate below the predetermined torque increase rate after the effective torque reaches the predetermined threshold torque.

Abstract: A fuel cell system to be installed on a vehicle includes a fuel cell, a secondary battery, an SOC detector that detects a temperature and a state of charge of the secondary battery, an accelerator position detector that detects an accelerator depressed amount, and a controller that controls power to be generated by the fuel cell. The controller includes: a required generation power calculator that calculates required generation power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery; and a maximum required power calculator that calculates maximum required power based on the accelerator depressed amount and the temperature and the state of charge of the secondary battery. The maximum required power includes allowable charging power correlated with a maximum value of charging power.

Abstract: A vehicle capable of regenerative braking includes a motor that is configured to be driven with electric power. The vehicle selectively sets a drive mode of the vehicle in an accelerator-off state between an ordinary mode and a deceleration enhanced mode that decelerates the vehicle with higher deceleration force than deceleration force in the ordinary mode. The vehicle performs regenerative control of the motor in the ordinary mode or performs deceleration control of generating the deceleration force in the deceleration enhanced mode, in order to decelerate the vehicle in the set drive mode. When an accelerator stroke based on a driver's depression of an accelerator becomes higher than a cancellation threshold in the drive mode set to the deceleration enhanced mode, the cancellation threshold being determined in advance corresponding to the accelerator stroke being greater than zero, the vehicle changes the drive mode from the deceleration enhanced mode to the ordinary mode.