Abstract: A fuel cell system is provided which can extend the time during which a high-potential avoidance control is performed as much as possible, thereby reducing deterioration of a fuel cell. The fuel cell system includes: a fuel cell that generates electric power upon a supply of a reaction gas; a power storage device that is charged with at least a part of power generated by the fuel cell; and a controller that controls an output voltage of the fuel cell with, as an upper limit, a high-potential avoidance voltage lower than an open end voltage thereof. The controller variably sets the high-potential avoidance voltage in accordance with the amount of charge SOC of the power storage device.

Abstract: A fuel cell system including a fuel cell for generating 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.

Abstract: A fuel cell system comprising a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas, and a control portion that controls amount of electricity generation at a time of starting the fuel cell, characterized in that the control portion has voltage drop control means for controlling speed of dropping a starting voltage of the fuel cell from an open-circuit voltage to a high-potential-avoiding voltage according to an initial voltage of the fuel cell and to a pre-determined threshold voltage that is lower than the high-potential-avoiding voltage, when the starting voltage of the fuel cell is dropped from the open-circuit voltage to the high-potential-avoiding voltage.

Abstract: A driving belt comprising plate elements juxtaposed in its thickness direction and a flat ring fastening the elements annularly. The elements includes at least one adjuster element configured to adjust an endplay as a total of clearances between the adjacent elements in the elements fastened annularly by the ring. The adjuster element comprises an insertion groove opening toward the endplay, and an inserting member inserted into the insertion groove and configured to protrude partially from the insertion groove thereby adjusting the endplay.

Abstract: A belt-driven continuously variable transmission adapted to prevent a tilting motion of a sheave under high temperature. The belt-driven continuously variable transmission is comprised of a pair of pulleys individually comprised of a fixed sheave rotated integrally with a rotary shaft and a movable sheave fitted onto the rotary shaft while being allowed to reciprocate thereon, and a driving belt applied to the pulleys to transmit power therebetween. a stopper member is disposed on an outer circumferential side and in a side where the driving belt is not contacted with the movable sheave so as to prevent the movable sheave from being tilted to widen a width between the fixed sheave and the movable sheave holding the driving belt by a load from the driving belt.

Abstract: A hydraulic control system for preventing shortage of lubricant and coolant during charging of an accumulator is disclosed. The hydraulic control system is comprised of: a hydraulic pump; an accumulator for storing fluid from the pump; and a constant delivery site which is connected to the pump in parallel with the accumulator, and which requires hydraulic fluid constantly during activation of the hydraulic pump. A pressure level of the fluid discharged from the pump is regulated to a level possible to be delivered to the accumulator, and the fluid resulting from the pressure regulation is delivered to the constant delivery site. Meanwhile, a pressure higher than that required by the constant delivery site is stored in the accumulator. The hydraulic control system is characterized by a fluid increasing means that delivers additional fluid to the constant delivery site together with the fluid resulting from said pressure regulation, when delivering the fluid discharged from the pump to the accumulator.

Abstract: Provided is a vehicle skid control device that avoids a skid erroneous judgment in a high revolution range of a motor. The vehicle skid control device detects the number of revolutions of the motor. When the number of revolutions of the motor is equal to or larger than a predetermined threshold value Nm, the vehicle skid control device prohibits a skid judgment. When the number of revolutions of the motor is smaller than the predetermined threshold value Nm, the vehicle skid control device permits the skid judgment. When the number of revolutions of the motor is equal to or larger than the threshold value Nm, the skid judgment is prohibited. Accordingly, it is possible to avoid the skid erroneous judgment in the high revolution range with the number of revolutions equal to or larger than Nm.

Abstract: In a lubricating device, as a clutch engagement pressure increases, the degree of opening of a flow rate adjusting valve is mechanically increased. Thus, as the clutch engagement pressure increases, the flow rate of an oil sucked from an oil pan to a suction portion of a jet pump is increased. Therefore, as the clutch engagement pressure increases, the flow rate of the oil ejected from an ejection portion of the jet pump is increased. That is, as the clutch engagement pressure increases, the flow rate of the oil for lubricating a lubrication portion of a friction clutch is increased. Accordingly, even if a torque/oil flow rate conversion mechanism, for example, a torque sensor is not used, the flow rate of the oil ejected from the jet pump can be changed only by a flow rate adjusting valve.

Abstract: A fuel battery system which can suppress unexpected variation of a target power during execution of a high potential avoidance control operation. The fuel battery system sets a high potential avoidance target voltage value, converts the high potential avoidance target voltage value into a target power value on the basis of the voltage-power property map of a fuel battery, limits the target power value within a range between a predetermined upper limit value and a predetermined lower limit value, and controls the operation of the fuel battery on the basis of the target power value while limiting the output voltage of the fuel battery to a value which is not larger than the high potential avoidance target voltage. This can suppress the unexpected variation of the target power value resulting from the erroneous estimation of output properties caused by the momentary drop of the high potential avoidance target voltage.

Abstract: The oxidizing gas supply is stopped during the catalyst activation treatment, and the output voltage of the fuel cell is linearly decreased toward the reduction target voltage. Once the interruption condition of the activation treatment has been satisfied, a voltage command value of the converter is returned to a standby voltage and, after waiting till the output voltage of the fuel cell returns to the vicinity of the standby voltage, the compressor is operated to start the supply of the oxidizing gas, and the catalyst activation treatment is completed. As a result, overcharging of the battery caused by rapid increase in the output power of the fuel cell is avoided.

Abstract: A power transmission belt low in cost and preventing work precision from being lowered and life expectancy of a metal press working mold from being decreased and a method of producing such a power transmission belt are provided. The power transmission belt includes endless band-like rings, and a plurality of elements bonded into an annular shape by the endless band-like rings. Each of the elements has both side end surface portions pressed between pulleys in the belt width direction, a rocking edge portion serving as a fulcrum when rocked in the state that the elements are partly wound around the pulleys, and a concave-convex portion engageable in concave-convex engagement with the concave-convex portions of a pair of neighboring elements. Each of the elements is formed with a curved inclination surface between the rocking edge portion and the concave-convex portion to have an inclination angle reduced toward the concave-convex portion.

Abstract: A fuel cell system capable of providing a suitable power distribution is provided. A fuel cell system includes: a fuel cell that generates electric power through an electrochemical reaction between a fuel gas and an oxidant gas; a motor that can be driven upon the supply of electric power and can generate regenerative power; a power storage unit which can be charged with power generated from the fuel cell and regenerative power of the motor and can discharge charge power to the motor; an auxiliary apparatus used for operating at least the fuel cell; and a control unit that controls a power distribution between the above components.

Abstract: A fuel cell system is equipped with a fuel cell, a DC/DC converter that is electrically connected to the fuel cell, and a control unit that controls the supply of a fuel gas and an oxidizing gas to the fuel cell and issues a voltage command to and drives the DC/DC converter to perform high potential avoidance control of restraining an output voltage of the fuel cell from exceeding a high potential avoidance voltage lower than an open circuit voltage. The control unit continues to drive the DC/DC converter so as to perform the high potential avoidance control for a predetermined time after stopping supplying the fuel cell with hydrogen and air in response to the inputting of a system operation stop command.

Abstract: In order to more rapidly warm up a battery device in a power supply equipped with a fuel cell and a battery device, a fuel-cell-mounted vehicle driving system for driving and controlling a rotating electric machine installed on a vehicle comprises an inverter connected to the rotating electric machine; a power supply circuit having a battery device, a voltage converter, and a fuel cell; and a power supply control device for controlling the power supply circuit. The power supply control device includes an FC output voltage setting module for setting the output voltage of the fuel cell, an OCV avoidance module for, when an FC output voltage is set, avoiding a voltage around an OCV, a battery warm-up control determination module for determining whether the battery device is under warm-up control or not, and an OCV avoidance release module for, when the battery device is under the warm-up control, releasing the OCV avoidance.

Abstract: There is provided a fuel cell system capable of suppressing the increase of a control error of a motor. The system includes a fuel cell which generates a power by an electrochemical reaction between a fuel gas and an oxidizing gas, a motor driven by the generated power of the fuel cell, and a control unit which controls the generation state of the fuel cell. The control unit performs high-potential avoiding control to prevent the total voltage of the fuel cell from exceeding a predetermined high-potential avoiding voltage threshold value. In a vehicle velocity region where the control switching of the traction motor is caused, the high-potential avoiding volume is inhibited.

Abstract: During an intermittent operation of the fuel cell, a demanded FC voltage calculation portion calculates a predetermined voltage that is below a heightened potential avoidance threshold voltage as a demanded FC voltage, and outputs the voltage to a converter. When during the intermittent operation of the fuel cell, a deviation obtained by subtracting a generated power of the fuel cell from a system's allowable power that is allowable in the fuel cell system becomes less than or equal to a value 0, the demanded FC voltage correction portion corrects a command value provided for the converter so that the deviation becomes equal to the value 0.

Abstract: A fuel cell system is provided which can accurately detect an insulation resistance even during a high-potential prevention control. The fuel cell system includes: a fuel cell that generates electric power through an electrochemical reaction between a fuel gas and an oxidant gas; an insulation resistance measurement unit that measures an insulation resistance between the fuel cell and an outer conductor; and a control unit that controls a power generation state of the fuel cell, and the control unit carries out a high-potential prevention control that avoids a voltage of the fuel cell becoming equal to or higher than a predetermined high-potential prevention voltage threshold lower than an open circuit voltage of the fuel cell, and changes the high-potential prevention voltage threshold during an insulation resistance detection performed by the insulation resistance measurement unit.

Abstract: A hydraulic control unit provided with oil pumps includes a first oil discharging outlet and a second oil discharging outlet, a high pressure route connected with the first oil discharging outlet, a medium pressure route with an oil pressure therein being lower than that in the high pressure route, a low pressure route with an oil pressure therein being lower than that in the medium pressure route, and a connection mode switching mechanism for selectively connecting a second oil discharging outlet with the high pressure route, the medium pressure route or the low pressure route. The connection mode switching mechanism includes a changeover valve selectively connecting the second oil discharging outlet with the medium pressure route or the low pressure route; and a changeover valve controlling device connecting the second oil discharging outlet with any of the medium pressure route and the low pressure route. The hydraulic control unit can minimize drive loss of an oil pump.

Abstract: To assemble a belt including a plurality of elements and a ring for fastening the element efficiently. A belt assembling apparatus for fastening a plurality of plate-like elements being juxtaposed in a same orientation annularly by a ring includes a load applying mechanism, which applies a load to the ring or to the elements which have already been fastened by the ring during a process of fastening the elements sequentially by the ring, thereby widening a clearance in an array of the elements being fastened by the ring. Therefore, the clearance to which the last piece of the element to be fastened by the ring is inserted can be widened relatively so that the element is allowed to be inserted into the clearance easily.

Abstract: When a request power for a fuel cell is smaller than a predetermined value, a fuel cell system stops the supply of an oxidizing gas to the fuel cell and lowers the output voltage of the fuel cell from a use upper limit voltage to a reduction voltage to perform catalyst activation processing. When the output voltage of the fuel cell lowers to an air blow voltage because of the shortage of the oxidizing gas, the fuel cell system resupplies the oxidizing gas to recover the output voltage of the fuel cell.