Patent application number | Description | Published |
20090155652 | FUEL CELL SYSTEM - A basic injection time of an injector is obtained from an FC current detected in step S | 06-18-2009 |
20090169936 | Fuel Cell System and Vehicle - The present invention relates to a fuel cell system including a fuel cell, a hydrogen gas piping system for supplying a hydrogen gas to the fuel cell, an injector which adjusts a gas state on an upstream side of the hydrogen gas piping system to supply the gas to a downstream side, and a control device which drives and controls the injector in a predetermined driving period, wherein a driving characteristic of the injector is learnt, and a driving parameter of the injector can be set based on a result of the learning. In the present invention, during an operation of the fuel cell, a supply pressure of the hydrogen gas can appropriately be changed in accordance with an operation state. In addition, even when the pressure is broadly varied, a satisfactory pressure response property can be secured regardless of fluctuations due to aging and individual difference of the injector. | 07-02-2009 |
20090169937 | Fuel Cell System and Mobile Body - In a mobile body, an intermittent operation to temporarily halt a cell operation is performed at a time when a request for power generation with respect to a fuel cell stack is less than a predetermined value, and recovery processing of a cell voltage is performed at a time when a cell voltage recovery processing executing condition is satisfied during the intermittent operation. When the mobile body is moving, a threshold voltage Vth | 07-02-2009 |
20100055521 | FUEL CELL SYSTEM - To provide a fuel cell system that can both improve power generation efficiency of a fuel cell and maintain durability of the fuel cell. A fuel cell system performs control such that when a power requirement for the fuel cell is lower than a predetermined value, a supply of a reaction gas to a fuel cell is stopped to keep an output voltage from the fuel cell equal to a high-potential avoidance voltage that is lower than an open end voltage. The fuel cell system further controls the output voltage from the fuel cell with the high-potential avoidance voltage set to be an upper limit when the power requirement for the fuel cell is equal to or higher than a predetermined value. By setting the upper limit of the output voltage of the fuel cell to be the high-potential avoidance voltage, which is lower than the open end voltage, the catalyst can be inhibited from being degraded by an increase in the output voltage from the fuel cell up to the open end voltage. | 03-04-2010 |
Patent application number | Description | Published |
20100248054 | FUEL CELL SYSTEM - Electric power generation is properly controlled during a high potential avoidance operation. A fuel cell system comprises a fuel cell for generating an electric power upon receiving supply of a reactant gas and a controller for performing control for high potential avoidance with the upper limit of the output voltage of the fuel cell as a high potential avoidance voltage lower than the open end voltage thereof. The controller computes a larger system requirement power out of a system requirement power calculated from a load requirement and a system requirement power calculated from the high potential avoidance voltage as a system requirement power for the fuel cell. To compute the system requirement power for the fuel cell, not only the system requirement power calculated from the load requirement but also the system requirement power calculated from the high potential avoidance voltage are taken into account, and therefore the electric power can be stably generated without causing fuel shortage. The amount of the electric power to be generated can be properly controlled, and hence battery overcharging can be thus prevented. | 09-30-2010 |
20100273071 | FUEL CELL SYSTEM AND FUEL CELL DEGRADATION JUDGMENT METHOD - Provided is a fuel cell system which can measure an air blow interval and consider an exceptional condition such as a high-potential-avoiding operation, thereby enabling an accurate judgment of degradation of an electrolyte. An actual air blow time interval is measured while estimating a theoretical air blow time interval when an increase of a hydrogen consumption amount corresponding to a cell voltage in the high-potential-avoiding operation according to an output current by using a relationship table which contains a record of a relationship between a hydrogen consumption amount consumed for maintaining the function of a fuel cell and the air supply time interval varying with the increase of the hydrogen consumption amount. The degradation of the electrolyte of the fuel cell is judged according to whether the measured actual air blow time interval is shorter than the theoretical air blow time interval corresponding to the hydrogen consumption amount. | 10-28-2010 |
20110187298 | FUEL CELL SYSTEM AND MOTOR DRIVING METHOD - A motor can be driven while reducing the power loss of the entire system where a plurality of devices that causes power losses exists. The system is provided with an inverter connected to a motor, a first converter that is connected between a fuel cell and the inverter and sets an output voltage of the fuel cell, a second converter that is connected between a power storage device and the inverter and sets an input voltage Vin of the inverter, and a controller that controls the first converter and the second converter. Under the operating condition (torque, number of revolutions) required for the motor, an input voltage of the inverter which minimizes a power loss of at least one of the motor, the first converter, the second converter and the inverter is determined, and the determined input voltage is output as a necessary voltage for the inverter. | 08-04-2011 |
20120015268 | FUEL CELL SYSTEM, CONTROL METHOD FOR THE FUEL CELL SYSTEM, AND ELECTRIC VEHICLE EQUIPPED WITH THE FUEL CELL SYSTEM - A fuel cell system that includes a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas, and a control portion that determines whether there is leakage of the fuel gas. The control portion has start means for starting the fuel cell by raising the voltage of the fuel cell from a starting voltage to an operation voltage that is lower than an open-circuit voltage, and leakage determination means for determining whether there is leakage of the fuel gas before the voltage of the fuel cell reaches the operation voltage when the fuel cell is started. | 01-19-2012 |
20120020128 | FUEL CELL SYSTEM - A fuel cell system FCS includes a fuel cell FC, a motor ES | 01-26-2012 |
20120083940 | FUEL CELL SYSTEM AND POWER CONTROL METHOD THEREFOR - There are provided a fuel cell system capable of reducing power consumption by inhibiting an unnecessary operation of a DC-DC converter, and a power control method therefor. The fuel cell system having an inverter which is connected to a load device, a first converter which is connected between a fuel cell and the inverter and sets an output voltage of the fuel cell, and a second converter which is connected between a power storage device and the inverter and sets an input voltage of the inverter includes fuel cell required output voltage calculation means for calculating a required output voltage of the fuel cell, inverter required input voltage calculation means for calculating a required input voltage of the inverter, comparison means for comparing the required output voltage of the fuel cell and the required input voltage of the inverter, and converter operation control means for causing the operation of the first converter to be suspended when judgment is made that the required output voltage of the fuel cell is not less than the required input voltage of the inverter. | 04-05-2012 |
20120107709 | FUEL CELL SYSTEM AND CONTROL METHOD THEREOF - A fuel cell system including a fuel cell, and a converter which is connected between the fuel cell and a high voltage system and which sets an output ceiling voltage of the fuel cell, the fuel cell system comprising fuel gas supply stopping means for stopping the supply of fuel gas to the fuel cell in an intermittent operation mode, remaining fuel gas amount determination means for determining whether fuel gas in at least an amount capable of generating power remains in the fuel cell, converter driving means for driving the converter so that, when it is determined that fuel gas in at least the amount capable of generating power remains in the fuel cell, the output ceiling voltage of the fuel cell becomes a first voltage capable of preventing deterioration of the fuel cell, and converter stopping means for stopping the converter when it is determined that fuel gas in at least the amount capable of generating power does not remain in the fuel cell. | 05-03-2012 |
20120109444 | FUEL CELL SYSTEM AND CONTROL METHOD OF SAME - Provided are a fuel cell system and a control method thereof capable of inhibiting the occurrence of problems caused by surplus electrical power even in cases where the torque able to be generated by the motor is limited due to a low motor drive voltage. A fuel cell system provided with a fuel cell and a motor is further provided with required output torque calculation means for calculating a required output torque based on an output requirement, torque upper limit value calculation means for calculating a torque upper limit value of torque able to be generated by the motor based on a drive voltage of the motor, required motor torque calculation means for calculating a required motor torque based on the required output torque and the torque upper limit value, required motor power calculation means for calculating a required motor power-based on the required motor torque, and required generated power calculation means forcalculating a required generated power of the fuel cell based on the required motor power. | 05-03-2012 |
20120146421 | FUEL CELL SYSTEM - An output of a fuel cell is appropriately controlled. A required electric power generation amount calculation unit calculates and adds: an amount of electric power to be supplied to a traction motor; an amount of electric power to be supplied to an auxiliary apparatus; and an amount of electric power to be supplied to a battery and the traction motor in accordance with the charging and discharging of the battery, to calculate a required electric power generation amount. A lost electric power amount calculation unit calculates a lost electric power amount with reference to a lost electric power amount map based on: the required electric power generation amount; and a voltage increase ratio, output voltage and temperature in an FC converter. A lost electric power amount addition unit corrects the required electric power generation amount by adding the lost electric power amount to the required electric power generation amount. An electric power generation request unit outputs an instruction requesting power generation such that the electric power is generated in the required electric power generation amount after being corrected. | 06-14-2012 |
Patent application number | Description | Published |
20120234735 | SIEVING DEVICE, SIEVING DEVICE FOR DEVELOPING DEVICE, AND POWDER-CHARGING DEVICE - A sieving device including a hollow cylindrical body, a filter disposed at a bottom portion of the hollow cylindrical body, and a blade configured to rotate in close proximity to the filter around a rotation axis thereof crossing the filter to thereby stir powder supplied to the hollow cylindrical body. | 09-20-2012 |
20120285540 | FLUID TRANSFERER, FLUID FILLING APPARATUS AND FLUID TRANSFER METHOD - A fluid transferer, including a volume changing part; a reciprocating member configured to reciprocate to expand a volume of the volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure; and a drive controller configured to control reciprocation of the reciprocating member such that a time for compressing the volume of the volume changing part is longer than a time for expanding the volume thereof. | 11-15-2012 |
20130319913 | SIEVING SYSTEM, AND METHODS OF NOTIFYING INFORMATION, DRIVING AND FEEDING - A sieving system includes a filter; a blade stirring a powder accumulated on the filter; a driver driving the blade; a notifier notifying predetermined information of a status of the filter, based on a load of the driver while driving the blade. | 12-05-2013 |
Patent application number | Description | Published |
20090314989 | Fluorescent substance composite glass, fluorescent substance composite glass green sheet, and process for producing fluorescent substance composite glass - The present invention is to provide a fluorescent substance composite glass which is chemically stable, has a large size, is reduced in wall thickness, has a uniform thickness and therefore has a high energy conversion efficiency, a fluorescent substance composite glass green sheet and a process for producing the fluorescent substance composite glass. The fluorescent substance composite glass of the present invention is produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, in which the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied. | 12-24-2009 |
20100136314 | DOPANT HOST AND PROCESS FOR PRODUCING THE DOPANT HOST - A dopant host containing, in terms of mole %, 20 to 50% SiO | 06-03-2010 |
20100155666 | PHOSPHOR COMPOSITE MATERIAL AND PHOSPHOR COMPOSITE MEMBER - Disclosed is a phosphor composite material which can be fired at low temperatures and enables to obtain a phosphor composite member which is excellent in weather resistance and reduced in deterioration after long use. Also disclosed is a phosphor composite member obtained by firing such a phosphor composite material. Specifically disclosed is a phosphor composite material composed of a glass powder and a phosphor powder, which is characterized in that the glass powder is composed of SnO—P | 06-24-2010 |
20120319060 | LIGHT REFLECTIVE SUBSTRATE AND LIGHT EMITTING DEVICE USING THE SAME - An object of the present invention is to provide a light reflective substrate capable of achieving high optical reflectance even though fine particles are not used as a material, and a light emitting device using the same. The light reflective substrate according to the present invention comprises: a glass matrix; and RNb2O6 crystal and/or R4Nb2O9 crystal (R is at least one of Mg, Ca, Sr and Ba) in the glass matrix. | 12-20-2012 |