Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.

Abstract: A fuel cell system according to one aspect of the invention is operated in an ordinary mode and in a gas leakage detection mode. The fuel cell system includes fuel cells, a fuel gas supplier configured to supply a fuel gas to the fuel cells, a shutoff valve provided in a flow path for leading a flow of the fuel gas supply from the fuel gas supplier to the fuel cells and configured to shut off the fuel gas supply, and a variable pressure regulator provided in the flow path between the shutoff valve and the fuel cells to regulate a pressure of the fuel gas in a downstream in a flow direction of the fuel gas supply to a variable pressure value. In the ordinary mode, the fuel cell system sets the pressure value of the variable pressure regulator to an ordinary power generation pressure value for ordinary power generation.

Abstract: A multi-cylinder internal combustion engine in which pistons provided in a plurality of cylinders are coupled to a crankshaft by connecting rods, an oil pan for storing oil is mounted below a crankcase, and a balancer device which has a balancer shaft driven to rotate in accordance with rotation of the crankshaft and a balancer housing for accommodating the balancer shaft is housed between the crankcase and the oil pan, the multi-cylinder internal combustion engine having a heat transfer member that is provided between the balancer housing and the oil pan and below the balancer shaft, and comes into contact with the balancer housing and the crankcase.

Abstract: According to the present invention, when a target braking/driving force and a vehicle target yaw moment required to a vehicle cannot be achieved through a control of a braking/driving forces of wheels, in a rectangular coordinate of the braking/driving force and the yaw moment, a polygon indicating the maximum range of the braking/driving force and the yaw moment attainable by the braking/driving forces of the wheels, and an ellipse that crosses each side of the polygon and has a major axis and a minor axis aligning with the coordinate axis of the rectangular coordinate are set, for example.

Abstract: In an apparatus for supplying powder coating material, when a given supply rate Qm of powder coating material F and a carrier air flow rate Qt are inputted, whether learned data of a suction air pressure Pfm with respect to the inputted given supply rate Qm is stored in a memory or not is determined. If the data is stored, the learned data of the suction air pressure Pfm is read, and a pressure regulator for suction air is instantaneously operated to be adjusted to have the value of the read learned data. After that, the apparatus moves to PID control with the given supply rate Qm being the target value. The value of the suction air pressure Pfm when the actual supply rate equals the given supply rate Qm is stored in the memory as learned data.