A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. An electrophotographic developing member characterized in that its surface layer satisfies the following expressions to where the average crosslinking density in each region of up to 100 nm in depth, from 100 nm to 200 nm in depth and from 200 nm to 300 nm in depth from the surface of the surface layer is represented by C1, C2 and C3, respectively:C3<C2<C1;\u2003\u2003C3\xd71. Accordingly, a separate transceiver module is not provided for the purpose of performing communication between a transmitting end and a receiving end, and a reception environment is automatically detected, thus enabling wireless power to be transmitted in an optimal wireless power transmission state. The engine torque control module controls engine torque during the torque phase of the transmission upshift based on the engine torque request. When the pressured fluid is introduced to the forward introduction port, it is clamped by a one-way movement of the piston. The plug member also has a leading end that lies in sealing engagement with the first end of the spout member when the plug member is received in the passageway.