In a saddle-riding-type electric vehicle fuel cell stack fixation structure, a vehicle body frame includes: a pair of right and left main frames that extend rearward from a head pipe and that are arranged on an outer side in a vehicle width direction of a fuel cell stack; a pair of right and left downward frames that extend rearward from the head pipe and that are arranged below the pair of right and left main frames; and a cross member that bridges a space in a vehicle width direction between at least the right and left downward frames and that fixes the fuel cell stack.

In a saddle-riding-type electric vehicle fuel cell stack fixation structure, a vehicle body frame includes: a pair of right and left main frames that extend rearward from a head pipe and that are arranged on an outer side in a vehicle width direction of a fuel cell stack; a pair of right and left downward frames that extend rearward from the head pipe and that are arranged below the pair of right and left main frames; and a cross member that bridges a space in a vehicle width direction between at least the right and left downward frames and that fixes the fuel cell stack.

A fuel cell vehicle comprising: a hydrogen tank which is mounted on the vehicle so as to have a center axis generally parallel to a front/rear direction of the vehicle; a high-voltage electric component which is positioned either forward or rearward of the hydrogen tank and which operates on high voltage; an aftercooler placed between the hydrogen tank and the high-voltage electric component to cool compressed air; and a fuel cell stack which is supplied with the cooled compressed air.

A fuel cell system includes: a first temperature sensor that measures the temperature of cooling water on the side of a cooling water outlet of a fuel cell; a second temperature sensor that measures the temperature of the cooling water on the side of a cooling water inlet of a water heater for heating the cooling water; a third temperature sensor that measures the temperature of the cooling water on the side of a cooling water outlet of the water heater; a cooling water pump that circulates the cooling water; and a control device. The control device is configured to determine that there is a cooling water leakage when the condition: measurement temperature T1 measured by the first temperature sensormeasurement temperature T2 measured by the second temperature sensor or the condition no temperature difference T between measurement temperature T2 and measurement temperature T3 measured by the third temperature sensor is met.

A vehicle fuel cell stack includes a stacked body, a stack case, and a cover member. The stack case accommodating the stacked body therein. The stack case includes an upper wall, a lower wall, and a vent opening. The lower wall is opposite to and below the upper wall in a height direction of a vehicle. The lower wall includes an upper surface and a lower surface opposite to and below the upper surface in the height direction. The vent opening passes through the bottom wall in the height direction. The cover member is disposed on the lower surface of the bottom wall to cover the vent opening when viewed in the height direction and to have an opening between the cover member and the lower surface of the bottom wall when viewed along the lower surface.

A vehicle fuel cell stack includes a stacked body, a stack case, and a cover member. The stack case accommodating the stacked body therein. The stack case includes an upper wall, a lower wall, and a vent opening. The lower wall is opposite to and below the upper wall in a height direction of a vehicle. The lower wall includes an upper surface and a lower surface opposite to and below the upper surface in the height direction. The vent opening passes through the bottom wall in the height direction. The cover member is disposed on the lower surface of the bottom wall to cover the vent opening when viewed in the height direction and to have an opening between the cover member and the lower surface of the bottom wall when viewed along the lower surface.

The disclosure relates to a method for increasing a temperature of a vehicle interior of a vehicle from a low temperature value to an increased temperature value, wherein the vehicle has a fuel cell system with a fuel cell stack and a compressor connected with the fuel cell stack at the cathode side, comprising: drawing in cathode gas via the compressor, and compressing and heating the drawn-in cathode gas. At least a portion of a cathode gas mass flow of the heated cathode gas is directed into the vehicle interior, and the temperature of the vehicle interior is raised to the increased temperature value. Moreover, the disclosure relates to a vehicle for implementing the method.

A two-wheeled motor vehicle includes: a vehicle body frame; a rear wheel unit swingably supported on the vehicle body frame; a fuel cell unit supported on the vehicle body frame; a fuel tank extending rearwardly from the fuel cell unit over the rear wheel unit; and a secondary cell that is charged with electric power from the fuel cell unit and disposed below the fuel cell unit and the fuel tank.

A two-wheeled motor vehicle includes: a vehicle body frame; a rear wheel unit swingably supported on the vehicle body frame; a fuel cell unit supported on the vehicle body frame; a fuel tank extending rearwardly from the fuel cell unit over the rear wheel unit; and a secondary cell that is charged with electric power from the fuel cell unit and disposed below the fuel cell unit and the fuel tank.

There is provided a fuel cell system comprising a first fuel stack, a first temperature gauge configured to measure a first temperature value, a power generation voltage meter configured to measure a power generation voltage, a cell voltage meter and a controller configured to control a temperature regulating mechanism such as to perform a temperature rise of the fuel cell stack. The controller is further configured to start the temperature rise of the fuel cell stack when a cell voltage is lower than a predetermined voltage value. When at least one of a plurality of time measurement conditions is satisfied after the first temperature value has reached a first reference temperature after a start of the temperature rise, the controller measures a time duration during which a voltage difference by subtracting the cell voltage from an average voltage of cells is maintained to be not greater than a predetermined voltage difference. When the measured time duration has reached a first reference time, the controller terminates the temperature rise. The plurality of time measurement conditions are conditions that predetermined time periods have elapsed since termination of a warm-up operation, since termination of an intermittent operation, since termination of regenerative braking and since a shift of the state of the fuel cell stack to a power generation capable state.