Abstract: A power supply device including vehicle connecting portions, a load connecting portion, a power supply portion, a memory portion for storing the number of charges and discharges for each storage-battery-equipped vehicle, and a supply control portion for performing control such that the power supply portion performs a discharge operation only on a selected supply vehicle. The supply control portion selects as the supply vehicle one of the storage-battery-equipped vehicles that satisfies a first condition that an SOC of a storage battery is greater than or equal to a prescribed value and a second condition that the number of charges and discharges is not the highest among the storage-battery-equipped vehicles.

Abstract: Provided is a charging system that causes usage conditions of chargers to be more equalized than before. A charging system includes a plurality of chargers. A controller of a first charger requests second chargers to output assistance power to a power sharing cable based on second charger information regarding the second charger when charge request from an electrically-powered vehicle connected to a charging port of the first charger exceeds output power capacity of a charging portion.

Abstract: A charging apparatus includes a plurality of charging ports; a charging portion configured to output charge current to the charging ports; an input portion configured to receive selection of a user among a plurality of charge patterns prepared in advance including a charge-history-dependent charge pattern to determine the charge current based on charge history information regarding a charge history of the electrically-powered vehicle; a selection result storing portion configured to store a result of the selection; a history information storing portion configured to store the charge history information of the electrically-powered vehicles connected to any of the charging ports; and a controller configured to refer to the selection result storing portion, control the charging portion in accordance with a selected charge pattern, the controller configured to determine priorities of the electrically-powered vehicles based on the charge history information when the charge-history-dependent charge pattern is selec

Abstract: Provided is a power supply device capable of switching power sources and thereby continuously supplying electricity to a load. Included are vehicle connecting portions 1-1, 1-2, and 1-3, a load connecting portion 2, a power supply portion 3, a memory portion 12 for storing the number of charges and discharges for each storage-battery-equipped vehicle, A, B, or C, and a supply control portion 13 for performing control such that the power supply portion 3 performs a discharge operation only on a selected supply vehicle. The supply control portion 13 selects as the supply vehicle one of the storage-battery-equipped vehicles A to C that satisfies a first condition that an SOC of a storage battery is greater than or equal to a prescribed value and a second condition that the number of charges and discharges is not the highest among the storage-battery-equipped vehicles.

Abstract: A charging apparatus includes a plurality of charging ports; a charging portion configured to output charge current to the charging ports; an input portion configured to receive selection of a user among a plurality of charge patterns prepared in advance including a charge-history-dependent charge pattern to determine the charge current based on charge history information regarding a charge history of the electrically-powered vehicle; a selection result storing portion configured to store a result of the selection; a history information storing portion configured to store the charge history information of the electrically-powered vehicles connected to any of the charging ports; and a controller configured to refer to the selection result storing portion, control the charging portion in accordance with a selected charge pattern, the controller configured to determine priorities of the electrically-powered vehicles based on the charge history information when the charge-history-dependent charge pattern is selec

Abstract: Provided is a charging system that causes usage conditions of chargers to be more equalized than before. A charging system includes a plurality of chargers. A controller of a first charger requests second chargers to output assistance power to a power sharing cable based on second charger information regarding the second charger when charge request from an electrically-powered vehicle connected to a charging port of the first charger exceeds output power capacity of a charging portion.

Abstract: The present invention addresses the problem of providing a charging device capable of precisely outputting charging power to a battery or the like within a broad voltage range of tens-to-hundreds of volts. This charging device comprises: a converter unit that outputs a charging voltage to a battery and a control unit that outputs a control signal of a pulse width determined on the basis of the voltage value of the charging voltage to a switching element of the converter unit, thereby setting the switching element to a conducting state for only a time corresponding to the pulse width. The control unit changes the output interval for the control signal in accordance with the output interval for the control signal as the voltage value of the charging voltage decreases.

Abstract: A stationary charging system that is capable of battery charging even when a charging unit has a fault is mounted in a vehicle and includes a power unit for generating direct-current charging power, a plurality of charging units (CHG1 to CHG9) that constitute the power unit, a control unit (MCU), and a first CAN communication line for allowing data exchange between the control unit the charging units, the charging units create charging unit status data concerning results of fault diagnosis on themselves, and transmit the data to the control unit, and the control unit classifies the charging units into a plurality of charging unit groups 4-1, 4-2, and 4-3, and changes output statuses of the charging units for each of the charging unit groups upon reception of charging unit status data indicative of a fault.

Abstract: A stationary charging system for charging a battery mounted in a vehicle using direct-current charging power includes a power unit for generating direct-current charging power, a plurality of charging units (CHG1 to CHG9) that constitute the power unit, a control unit (MCU), and a first CAN communication line for allowing data exchange between the control unit and the charging units, each of the charging units receives control command data transmitted by the control unit, and creates charging unit status data, and the control unit, and creates charging unit status data, and the control unit divides the charging units into charging unit groups 4-1, 4-2, and 4-3, and transmits the control command data at varying times, whereby the charging unit status data is received at varying times.

Abstract: A stationary charging system for charging a battery mounted in a vehicle using direct-current charging power includes a power unit for generating direct-current charging power, a plurality of charging units (CHG1 to CHG9) that constitute the power unit, a control unit (MCU), and a first CAN communication line for allowing data exchange between the control unit and the charging units, each of the charging units receives control command data transmitted by the control unit, and creates charging unit status data, and the control unit, and creates charging unit status data, and the control unit divides the charging units into charging unit groups 4-1, 4-2, and 4-3, and transmits the control command data at varying times, whereby the charging unit status data is received at varying times.

Abstract: The present invention addresses the problem of providing a charging device capable of precisely outputting charging power to a battery or the like within a broad voltage range of tens-to-hundreds of volts. This charging device comprises: a converter unit that outputs a charging voltage to a battery and a control unit that outputs a control signal of a pulse width determined on the basis of the voltage value of the charging voltage to a switching element of the converter unit, thereby setting the switching element to a conducting state for only a time corresponding to the pulse width. The control unit changes the output interval for the control signal in accordance with the output interval for the control signal as the voltage value of the charging voltage decreases.

Abstract: A stationary charging system that is capable of battery charging even when a charging unit has a fault is mounted in a vehicle and includes a power unit for generating direct-current charging power, a plurality of charging units (CHG1 to CHG9) that constitute the power unit, a control unit (MCU), and a first CAN communication line for allowing data exchange between the control unit and the charging units, the charging units create charging unit status data concerning results of fault diagnosis on themselves, and transmit the data to the control unit, and the control unit classifies the charging units into a plurality of charging unit groups 4-1, 4-2, and 4-3, and changes output statuses of the charging units for each of the charging unit groups upon reception of charging unit status data indicative of a fault.

Abstract: A deterioration diagnosis system for an air fuel sensor mounted to an exhaust pipe of an internal combustion engine. The air fuel sensor determines a mixture ratio of air and fuel fed into the internal combustion engine. In the system, an inclination of an output signal of the air-fuel ratio sensor is calculated; variance of the inclination is calculated; deterioration of the air-fuel ratio sensor is determined based on the variance of the inclination.

Abstract: Factors affecting the response time of a transfer system from the combustion of injected fuel to the detection of its oxygen concentration include a stroke delay time due to an engine speed, the dependence of an LAF sensor response time on an exhaust gas flow rate, a response time change of the LAF sensor due to its deterioration with time, and the like. If a hyperplane of the sliding mode is fixed without considering the above-mentioned factors affecting the response time of the transfer system, an overshoot or oscillation of a feedback system may occur at low speeds of the engine even if preferable feedback responsiveness can be achieved, for example, at high speeds of the engine. This results in aggravated exhaust emissions, degraded drivability due to torque fluctuations, and fluctuations in idle speed.

Abstract: A deterioration diagnosis system for an air fuel sensor mounted to an exhaust pipe of an internal combustion engine. The air fuel sensor determines a mixture ratio of air and fuel fed into the internal combustion engine. In the system, an inclination of an output signal of the air-fuel ratio sensor is calculated; variance of the inclination is calculated; deterioration of the air-fuel ratio sensor is determined based on the variance of the inclination.

Abstract: An air fuel ratio control system includes an exhaust gas sensor to sense an oxygen concentration in an exhaust passage of an internal combustion engine, and a controller. The controller is configured to judge that the exhaust gas sensor is in an active state, by monitoring a decrease of an output of the exhaust gas sensor from a level greater than a first predetermined value, to a level smaller than or equal to the predetermined first predetermined value, and to allow the air fuel ratio control when the exhaust gas sensor is judged to be in the active state.

Abstract: An air fuel ratio control system includes an exhaust gas sensor to sense an oxygen concentration in an exhaust passage of an internal combustion engine, and a controller. The controller is configured to judge that the exhaust gas sensor is in an active state, by monitoring a decrease of an output of the exhaust gas sensor from a level greater than a first predetermined value, to a level smaller than or equal to the predetermined first predetermined value, and to allow the air fuel ratio control when the exhaust gas sensor is judged to be in the active state.

Abstract: A device according to the present invention is provided with element temperature measurement voltage application circuit for temporarily applying a predetermined voltage for element temperature measurement to a sensor element of an air-fuel ratio sensor equipped to an exhaust system of an internal combustion engine, first sensor output reading circuit for reading in a sensor output just before applied with the voltage, and second sensor output reading circuit for reading in a sensor output being applied with the voltage, wherein the element temperature of the air-fuel ratio sensor is estimated based on the sensor output just before applied with the voltage and the sensor output being applied with the voltage. Further, during internal resistance measurement of the sensor element of the air-fuel ratio sensor equipped to the exhaust system of the internal combustion engine, a voltage applied to the heater for heating the sensor element is maintained to be constant.

Abstract: When an internal combustion engine is in a low load and low rotation operation, and also an elapsed time after the starting of engine operation is less than a predetermined period of time, a heater heating an air-fuel ratio sensor is turned OFF, to stop an air-fuel ratio feedback control. When the internal combustion engine is in the low load and low rotation operation after the predetermined period of time has elapsed, a low voltage is applied to the heater and also a gain is lowered, to perform the air-fuel ratio feedback control.

Abstract: In a low rotation speed and low load operation region of an internal combustion engine, the heating of an air-fuel ratio sensor by a heater is stopped, and also an air-fuel ratio feedback control is stopped, and just after the heating of the air-fuel ratio sensor by the heater and the air-fuel ratio feedback control are started, a smoothing degree of a detection signal of the air-fuel ratio sensor is set to be small, to perform the air-fuel ratio feedback control based on the smoothed detection signal.