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 is equipped with a fuel cell and a secondary battery. This fuel cell system is equipped with a recordation unit that records a charge-discharge history of the secondary battery, a prediction unit that predicts restriction on an output of the secondary battery based on the charge-discharge history recorded by the recordation unit, and an output control unit that starts power generation by the fuel cell prior to a timing of restriction on the output of the secondary battery, when the prediction unit predicts restriction on the output of the secondary battery and the fuel cell is in an intermittent operation state.

Abstract: On a start of a fuel cell system, (i) when the temperature of a high-voltage secondary battery obtained from a temperature sensor is higher than a predetermined reference value, a controller of the fuel cell system is configured to set an output voltage on a step-down side of a DC-DC converter to a higher voltage than a voltage of a low-voltage secondary battery and subsequently start an FC auxiliary machine using electric power from the high-voltage secondary battery. (ii) When the temperature of the high-voltage secondary battery obtained from the temperature sensor is equal to or lower than the predetermined reference value, on the other hand, the controller of the fuel cell system is configured to set the output voltage on the step-down side of the DC-DC converter to a lower voltage than the voltage of the low-voltage secondary battery and subsequently start the FC auxiliary machine using the electric power from the high-voltage secondary battery.

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 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.

Abstract: A vehicle comprises a fuel cell that is configured to receive supply of a fuel gas and generate electric power and a motor that is configured to be driven with the electric power generated by the fuel cell. 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 vehicle changes the drive mode from the deceleration enhanced mode to the ordinary mode.

Abstract: A voltage control system includes a converter device, and a controller configured to set a duty ratio according to a current target value so as to cause the converter device to repeatedly perform a boost operation according to the duty ratio. The controller is configured to set the duty ratio by use of a basic term including a feedforward term, and an additional term, the feedforward term being derived by use of a measured value of a magnitude of an input of a reactor provided in the converter device and a measured value of a magnitude of an output of the reactor or by use of respective target values of the magnitude of the input and the magnitude of the output in the reactor, the additional term being derived by use of the variation of the current target value during one cycle.

Abstract: If a required voltage which corresponds to a required power has reached a boundary voltage, which is an oxidation-reduction potential of platinum, which constitutes a catalyst of a fuel cell, the fuel cell system performs crossover-avoidance control that holds an FC instruction voltage for the fuel cell at the boundary voltage, and absorbs the gap between the required voltage and the FC instruction voltage by using a secondary battery.

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 mariner 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: 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 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 fuel cell system includes a fuel cell containing a unit cell with an anode and a cathode included therein, a hydrogen supply unit that supplies hydrogen gas to the anode, a circulation pump that supplies an anode exhaust gas containing hydrogen that has not been used for power generation by the fuel cell and is discharged from the anode, once again to the anode to circulate the anode exhaust gas, and a controller that controls supply quantity of the hydrogen gas by the hydrogen supply unit as well as rotating speed of the circulation pump. The controller drives the circulation pump so that the rotating speed of the circulation pump approaches an optimum rotating speed of the circulation pump at which a total hydrogen loss quantity becomes a minimum under a specified current value, the total hydrogen loss quantity being a sum of a hydrogen quantity corresponding to an electric power necessary for driving the circulation pump and a hydrogen quantity passing from anode side to cathode side of the fuel cell.

Abstract: A method for controlling an external electric power supply system supplying electric power from a fuel cell and a secondary battery mounted on a vehicle to an external load, the method including controlling electric power from the fuel cell and the secondary battery such that externally supplied electric power supplied to the external load is equal to or less than supply allowed electric power, and setting the supply allowed electric power to be equal to or less than a smaller one of an upper limit value of electric power which the secondary battery is charged with set in accordance with a temperature, and an electric power storage amount of the secondary battery and an upper limit value of electric power discharged from the secondary battery set in accordance with the temperature and the electric power storage amount of the secondary battery.

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: A fuel cell system includes an air compressor that supplies oxidant gas to a fuel cell installed in a fuel cell vehicle, a measured rotational speed acquirer that acquires a measured value of rotational speed of the air compressor, and a controller that calculates a rotational speed command value of the air compressor based on required generated power of the fuel cell, calculates a torque command value of the air compressor based on the calculated rotational speed command value and current rotational speed of the air compressor, and controls rotational speed of the air compressor based on the calculated torque command value. The controller estimates the current rotational speed of the air compressor baaed on the measured value of the rotational speed acquired by the measured rotational speed acquirer and a history of the calculated torque command value, and calculates the torque command value by using the estimated rotational speed.

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 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 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.